Honda fault code p2646. What are the common causes of code .
Honda fault code p2646 May 1, 2024 · The rocker arm oil pressure switch is a crucial component in an internal combustion engine’s lubrication system. May 21, 2020 · So my '06 EX-L started an engine light and VSA light. Feb 12, 2023 · If you experience a check engine light and see the code P2646 on your Honda, there are some common causes! We will tell you what it means and how to fix it. Feb 28, 2018 · Having repeated Check Engine light with P2646 code and occasionally the VSA trips as well but the VSA resets itself. Introduction Some 2018 – 2019 model year C-HR (equipped with a 3ZR-FAE engine) and 2020 model year Corolla (equipped with a 2ZR-FAE engine) vehicles may exhibit a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs): 2003 Honda Element P2646 Code: Rocker Arm Actuator Issue Explained Element owners often face VTEC system faults and rocker arm actuator sticking causing performance drops. But before jumping into specifics, let’s go over some background information. It was 8:55pm and I was leaving Phoenix for Flagstaff work in the am, 150miles away. Transmission issues may arise if torque converter or mounts are worn. Nov 16, 2019 · Honda Prelude, Lamborghini Temerario, Ford Maverick 300T, Lightning Trouble - AutoGuide Show Ep 95 Jan 17, 2022 · When VTEC is on: VTEC SOL = ON, 12v on GRN/YEL wire, VTEC PRESS SW = OFF, 12v on BLU/BLK wire. Know about symptoms like decreased performance and common causes such as low oil levels or PCM failure. Symptoms included, Jerking, Poor Performance, as well as the continuous illumination of the Check Engine Understanding the P2646 Code in Your Honda Accord - Causes and Solutions If you own a Honda Accord and your check engine light has come on, pulling the diagnostic trouble code (DTC) might show P2646. 4L engine. 37 V or more when the APP sensor A voltage is 0. 2007 Honda pilot. Apr 17, 2006 · While I wait for my parts, came across this Service news bulletin from Honda that discusses the trouble codes (P2646, P2647) and repair strategy. The frequency increased so I pulled the VCM solenoid and replaced both gaskets. Sep 22, 2018 · Hi, my CEL just came on and I had it read at Auto Zone. A P2646 diagnostic trouble code is an OBD code created by the Engine Control Module (ECM). . Check engine was on and code was P2646. Recommend making sure engine oil system is as clean as possible, and good oil pressure is being built by the Learn how to resolve the P2646 error code on your Honda Accord with expert tips. Start by scanning all related modules Feb 4, 2019 · So, two months ago I replaced the VTEC oil pressure switch on the spool as it had failed and gave a P2646 code. They May 12, 2018 · Hello everyone! Bought 2003 element. com If you have a Honda with a P2646 OBDII error code, the ECM does not see the rocker arm oil switch working when the rocker arm oil control solenoid is switched on. Overview of a P2646 engine error code on a Honda Element. There is a basic troubleshooting guide in one of these threads that tells you how to check it via a multimeter. 4 Odyessy, Accord, Element, CRV. Our mobile mechanics can diagnose and fix your P2646 trouble code in your driveway. Code P2646 indicates a problem with the Variable Valve Timing (VVT) system, often linked to the VTEC oil control solenoid. It will detect whether the “A” rocker arm actuator control circuit is not functioning properly or is Jan 7, 2020 · P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Civic. New oil and filter, still throwing code Jan 26, 2025 · Symptoms Associated with P2646 When a Honda vehicle experiences the P2646 error, drivers may notice: Illuminated Check Engine Light Reduced engine performance Limited RPM range (usually capped around 3000-4000 RPM) Poor fuel economy Rough idling or stalling Diagnosing P2646 To properly diagnose the P2646 code: Check the engine oil level and HONDA ERROR CODE P2646 - VTEC 2. A subreddit for Honda Element enthusiasts! The Honda Element was a compact crossover SUV based on a modified CR-V platform, manufactured in East Liberty, Ohio and offered in front-wheel and all-wheel drive formats in the United States and Canada from model years 2003 through 2011. What codes were setting in the stability control module? The P2646 code relates to the engine's variable valve timing system. It came up P2646. This mod bypasses your vtec oil pressure switch and convinces the ECU that vtec is working correctly. Let’s break down what this code means, symptoms to look for, mostly likely causes, and how to address the problem in a step-by-step manner. Aug 19, 2024 · How to repair P2647 Honda — Rocker Arm Oil Pressure Switch Circuit High Voltage Definition meaning and fixes for a Honda P2647 engine code: “A” Rocker Arm Actuator System Stuck On Diagnostic Trouble Code Honda VTEC allows for higher performance at high RPM, and lower fuel Dec 4, 2024 · Discover the Honda Element P2646 code, its meaning, and potential causes. RE: 2237 fault code. I understand that it has to do with the vtec oil pressure switch, and some people have had luck with replacing the switch, VTC solenoid, and/or spool valve assembly, (considering the mileage and abuse, its about time something broke on this engine!) Out of curiosity, I disconnected the battery to clear the Feb 1, 2018 · I have a touring 2006, almost 200k miles, start the car for few second the VSA and triangle, engine lights on. Definition meaning and fixes for a Honda P1009: Variable Valve Timing Control Advance Malfunction Diagnostic Trouble Code Causes of a Honda P1009 DTC: Low or Dirty Engine Oil Variable Valve Timing Popular Honda Odyssey fault codes along with an explanation of their meanings. Some vehicles, such as the Honda Civic, feature a Variable Timing and Lift (VTEC) system. Get expert tips on repairs and maintenance to keep your Honda Element running smoothly. Learn what triggers this code and how to fix this issue in a step by step manner. Learn how to diagnose and fix the P2646 code in your Honda Accord with this comprehensive guide. Learn about the common symptoms, potential causes, and effective troubleshooting methods to resolve this issue and ensure your vehicle runs smoothly. I did an oil change since I Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. What are the common causes of code Jan 1, 2011 · Repair Information for P2646 Honda code. Problem solved. I've reviewed the postings for this particular issue and have followed several fixes but still having issue. ” It’s a generic OBD-II powertrain code supported by a variety of makes and models. Apr 23, 2025 · Got a code scanner and I got a p2646. in this video I'm gonna share with you how to diagnose and fix a Honda Element that loses Power and Surges, this vehicle had code P2646 & P2647 trouble code in the Engine Computer, Follow along as 2003 Honda Element with P2646 code. Read here for more information: https://www. This code can cause confusion and worry for many car owners. Throwing random parts just wastes money and causes frustration. Apr 13, 2021 · Honda Prelude, Lamborghini Temerario, Ford Maverick 300T, Lightning Trouble - AutoGuide Show Ep 95 Free Download honda fault codes list pdf honda fault code p2646 Honda-fault-code Free Download finch13 , 12-22-2008 01:00 PM. Learn how to address the P2646 error code in your Honda CR-V with expert tips from Mavyn. Jan 7, 2020 · P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Odyssey. 4L (EASY FIX AND LESS THAN $5) 2003 - 2007 Honda Accord Stalling Surging and Bucking? P2646 or P2647 VTEC Spool Valve - Innova 5610 May 15, 2024 · Owning a Honda Element comes with all kinds of wonderful things, but encountering the P2646 and/or P2647 codes sure isn’t one of them. Jan 7, 2020 · P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Pilot. Get your car running smoothly again. Jun 23, 2025 · This code specifically affects vehicles with variable valve timing systems (especially Honda/Acura’s popular VTEC technology). Dec 21, 2021 · Also, the first thing that should be checked on a P2646 and P2647 error code is the rocker arm pressure switch which is the most common problem with both of those codes. 2007 Ody Touring 121k Oil has been changed regularly with 5W-20 synthetic but last change did run longer than planned I suspect there is some sludge for the extend oil change Jul 20, 2024 · The P2646 error code is one issue that has been known to affect the performance of Honda vehicles, including those with J-series, K-series, and R18 engines alike. Service history is pretty good. This switch is responsible for monitoring the oil pressure in the rocker arm assembly, which helps control the variable valve timing system. Jan 1, 2011 · The P2646 Honda code indicates a problem with the Rocker Arm Oil Pressure Switch Circuit, specifically that the voltage is too low. Mine were leaking and dripping directly onto the oil pressure switch and vtec assembly, fried out multiple switches and went through an unreasonable amount of bullshit before I figured it out. Learn what triggers P2649, how to fix it, and how to prevent it, ensuring your Honda runs smoothly and efficiently. There is no single method to fix the P2646 code since there are a few potential causes that can trigger it. It is specifically related to the “A” rocker arm actuator control circuit. backgournd: 2008 honda element ~150K miles, no other issues or codes, change oil every 5k with specified Jan 7, 2020 · P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Ridgeline. Traveled 800 miles in 2 days and on highway code popped up again. Been Around A Long Time Member. May 23, 2023 · Fault code p2646 Jump to Latest 2. If an oil change solved it, I assume likely a oil pressure or oil filter inlay issue. This has happened before, but quite a while ago. Mechanic's Assistant: How old is the transmission? Have you checked the brake switch? Customer: It a 2007 civic had a defected engine block Jan 24, 2019 · Repair Information for P2646 code. Ran the codes and came back with a P2646: VTEC OIL PRESSURE SWITCH CIRCUIT MALFUNCTION Idles fine, and runs fine as long as you keep the RPM low. Find out the most popular Honda fault codes along with what they mean. By doing so, it ensures proper lubrication and functioning of the engine’s valvetrain. Make: Honda Code: P2138 Definition: APP Sensor A/B or 1/2 (Throttle Position (TP) Sensor D/E) Incorrect Voltage Correlation (Includes Hybrid Models) Description: With the ignition ON (II) one of these conditions must be met for at least 300 milliseconds: (1) APP sensor B voltage exceeds the range from 0 V or less to 0. Dec 17, 2024 · Discover the meaning behind Honda Code P2646, which indicates a problem with the VTEC system. Reset the code and went for a drive and the code came back again. Error code P2646 rocker arm actuator system performance or stuck off bank one. Don’t fret; let’s dive deeper into understanding and troubleshooting this persistent issue. Come along as I will show you how to repair a surging or bucking on this 2006 Honda CRV with code P2647 or 2646 pressure switch circuit voltage high or low . Oct 19, 2019 · Honda Civic 2001-2005 (VTEC Solenoid) Honda Civic SI 2002-2005 (VTEC Solenoid) Honda Civic 1996-2000 (VTEC Solenoid) Honda Odyssey 2005-2007 (VTEC Solenoid) Honda Pilot 2008 (VTEC Solenoid) Instructions for Replacing the VTEC Solenoid Here is the aftermarket VTEC solenoid I purchased and installed. Get OBD-II code P2646: "A" Rocker Arm Actuator issues. Jul 20, 2024 · What Does The Honda P2646 Error Code Mean? Like all ‘P’ codes, this code is set by the Powertrain Control Module (PCM). May 26, 2025 · Learn all about the P2646 code, what causes "A" rocker arm actuator system performance issues, and how to diagnose and fix common problems to maintain optimal engine performance. I did an oil change since I Dec 27, 2024 · Discover the meaning behind the Honda Element error code P2646. I ordered a non-OEM pressure Nov 6, 2025 · While I wait for my parts, came across this Service news bulletin from Honda that discusses the trouble codes (P2646, P2647) and repair strategy. The car cranked up to 3000rp. The VTEC system is one of the many Honda inventions and P2647 is a trouble code indicating a problem with the way the VTEC system is working. The resulting “limp mode” can ruin any drive. If you experience P2646 code issues which is related to the rocker arm oil pressure switch Mar 28, 2017 · If the ECM detects that the system isn’t working properly, it will set a DTC (diagnostic trouble code) and illuminate the MIL (malfunction indicator lamp). If this video is helpful, give it a "thumbs up" and consider subscribing to our channel. No change. The P2646 code indicates a problem with the rocker arm actuator system on bank one. This is a problem on most Honda car and Jan 7, 2020 · P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Fit. Anyway, I read the codes the truck was putting out and one of the codes was: P2646 Mod $11 A Rockerarm ActuatorControl System Performance / Stuck Off (bank 1) Confirmed Does Feb 1, 2020 · In this video, young mechanic Aiman discusses P2646, which is an OBD-II generic code for the engine control module (ECM) detecting the 'A' rocker arm actuator control circuit for bank 1 has a Feb 15, 2025 · I bought a computer Vtec solenoid assembly from Honda and my p2647 problems went away before the p2646 popped up. Nothing too earth shattering, but interesting for basic documentations sake. I replaced the VTEC solenoid gasket set, both the one with the screen and the one inside the solenoid. I go through what could be the cause of the fault code and how the terminal connections may be I had p2646/47 codes for a long time, finally spliced on a new connector and replaced the fried oil pressure switch. HDS = Honda Diagnostic System aka a high end code scanner (a few thousand $ to put a system together). Jan 30, 2024 · The P2646 code is for the rocker arm actuator system, and since this is a non-VTEC engine, all the rocker arm actuator system controls is engaging VCM. Replaced Vtec assembly and cleaned screen. there was some sludge build up a few oil changes ago. The car didn’t want to go over 3500 rev. The P2646 code indicates a problem with the rocker arm actuator system on bank 1, often due to stuck or malfunctioning VTEC solenoids. It’s always code p2646 Mechanic's Assistant: What's the make, model, and year of your car? Customer: 2007 Honda pilot Mechanic's Assistant: Is there anything else the Pilot Here's how to fix a P1009 or P2646 code for a stuck camshaft position on a Honda i-VTEC engine. If your vtec CEL code is actually caused by low oil pressure or blocked oil passage ways and screens, this may hurt your motor! Jun 10, 2021 · Diagnose and fix Honda P2647 code, along with a P2646, P2651, and P2652 The Variable Timing/Lift Control (VTEC) oil pressure switch is located on the back of the cylinder block near the oil filter. Find out what you can do next to solve the problem you are experiencing. Jan 7, 2020 · P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Element. This switch is responsible for monitoring the oil pressure in the VTEC (Variable Valve Timing and Lift Electronic Control) system. Scanned the code and it came up with P2646. Mar 2, 2020 · Trouble with P2646 Honda code? Learn about the VTEC Oil Pressure Switch Circuit and Honda's service bulletin to address the issue. One service was about 5k km late but spotless other than that. The 'A' rocker arm actuator is a component of the VVT system Dec 26, 2022 · When people say 2003 honda element code p2646, 2004 honda element p2646, 2005 honda element p2646, or 2006 honda element p2646, they prefer the same P2646 Code. I did the scan at autozone. Tracking down the issue can be a daunting experience. Learn about its symptoms, potential causes, and effective solutions to diagnose and resolve this issue, ensuring optimal engine performance. Browse through 14 models of Honda available on site now. People in different forums mentioned about replacing the Oil Pressure switch which is located at the back of the engine. Customer: P2646 fault code as well as p2649 I've changed the VTC solenoid engine has a vibration when cold not so much after its warm but still has vibs Its like a low rumble vibration in gear or out. Also, variable cylinder management system stuck in the off position. (2) APP sensor B Popular Honda Civic fault codes along with an explanation of their meanings. I swapped the switch from my old part to the new assembly and the p2646 code went away. Jan 4, 2009 · The Diagnostic Trouble Code (DTC) was P2646: VTEC Oil Pressure Switch Circuit Low Voltage. The P1009 code is often caused by a sticking Variable Timing C Mechanic for Honda: Aziz Essentially, the fault code P2646 indicates an issue with the “A” Rocker Arm Actuator System Performance/Stuck Off. This guide covers potential causes, symptoms, and solutions for this diagnostic trouble code (DTC Sep 26, 2019 · Learn how to fix ERROR CODE P2646 on your HONDA with the 2. 3K views 5 replies 3 participants last post by K. Ensure optimal engine performance by understanding this diagnostic trouble code and how to address it. It came with a new gasket as well. 4L (EASY FIX AND LESS THAN $5) VTEC Repair P2647 Or 2646 (Pressure Circuit Voltage High Or Low) 2003 - 2007 Honda Accord Stalling Surging and Bucking? After some investigation and researching the error code translated to “Rocker Arm Oil Pressure Switch Circuit Low Voltage”. Following are the possible solutions to mitigate this error: Repair and replace the wiring apparatus or connector to the actuator Use the required oil, clean air and oil filter for suitable viscosity; Flush the engine passages There shouldn’t be any sludge in the engine oil passage Aug 15, 2021 · For example, DTC = diagnostic troubleshooting code aka the number code than a scanner spits out (like P2646, or 61-1). Has any one seen this before? Where would I start looking for Customer: VSA light code P2646 Mechanic's Assistant: Is the VSA light blinking or flashing, or is it solid? When did you first notice it? Customer: It only comes on sometimes, but stays on and limits my rpms to 3k. The codes for the traction control system may have set due to the engine code, or there may be other issues. In this Video, we show how we successfully diagnosed and fixed a Fault in the Honda CRV. in this video I'm gonna share with you how to diagnose and fix a Honda Element that Loses Power and Surges, this vehicle had a P2646 Trouble code in the Engi The P2646 code indicates a problem with the rocker arm actuator system on bank one. Symptoms include limited speed and poor acceleration. DTC P2237: Rear A/F Sensor (Bank 1, Sensor 1) IP Line High Voltage honda fault codes list pdf honda fault code p2646 honda fault code p1157 Sep 19, 2018 — Accord P0171 Code Defined The code is thrown when the May 13, 2019 · This video is about Honda P2646 P2647 engine check code fix I-Vtec 2. Engine light Code: P2646 Hello, So recently I had my engine light come on my 2004 Honda Accord Ex and when I went to emissions it said because of my Catalytic converter, I dish out the money and get that fixed ($1600). This code indicates that there is an issue with rocker arm oil pressure switch. Make: Honda Code: P2646 Definition: Rocker Arm Oil Control Valve A Stuck ON/OFF Description: With the engine running at operating temperature, and the vehicle speed is a minimum of 12 mph (18 km/h) or more with the engine speed between 900-3,000 rpm the following conditions occur for 2 seconds or more. Sep 13, 2024 · The diagnostic trouble code P2646 indicates a problem with the 'A' Rocker Arm Actuator System Performance or that it is stuck off in Bank 1. 2007 Honda CR-V P2646 Code Limits Speed to 35 MPH CR-V users often face variable valve timing errors and reduced engine power under load conditions. It started throwing this code occasionally when driving in rain 2006 Honda Odyssey P2646 Code: Causes and Fixes Explained Odyssey models often face variable valve timing issues and oxygen sensor faults causing engine performance drops. Code P2646 indicates a problem with the Variable Valve Timing (VVT) system, specifically the VVT solenoid or actuator. Jan 24, 2019 · The P2646 diagnostic trouble code for Honda vehicles indicates an issue with the Rocker Arm Oil Pressure Switch Circuit having low voltage. Feb 22, 2024 · The P2647 code is a diagnostic trouble code that indicates an issue with the rocker arm actuator system. See full list on hondatheotherside. backyardmechanic. Do you have a scan tool available? Check engine light is on and I have error code p2646 on my standard 2004 Honda civic ex. Learn how to diagnose and fix the P2646 code in your Honda Accord with this step-by-step guide, turning you from a novice to a pro. Popular Honda CR-V fault codes along with an explanation of their meanings. P2647 is the code, I changed the rocker arm oil pressure switch, still have the same problem . The P2646 code indicates the VTEC system is stuck off or Definition Meaning and Fixes for a Honda P2646 engine Diagnostic Trouble Code: ‘A’ Rocker Arm Actuator System Performance / Stuck Off Bank 1 "Rocker Arm Oil May 27, 2024 · What Does the P2646 Code Mean? Diagnostic Trouble Code (DTC) P2646 code stands for “A” Rocker Arm Actuator System Performance/ Stuck Off (Bank 1). How how do I test the 2006 Honda Odyssey VSA Light On with Trouble Code P2646 Odyssey often faces VSA light activation and engine hesitation related to variable valve timing issues. P2646 is vtec pressure switch circuit LOW, which means that the computer was expecting 12v on the wire, but got 0V on wire. 5L and the scanner is marking misfire on all cylinders and I also have the code P2646? May 1, 2024 · Explore our comprehensive guide on understanding the Honda P2649 diagnostic trouble code. It said Rocker arm oil pressure switch (VTEC Oil pressure switch) circuit low voltage. HONDA ERROR CODE P2646 - VTEC 2. A Honda CRV with a P2646 error code is having an issue with the oil pressure. a Discussion starter Dec 7, 2024 · Discover the common issues related to the P2646 code in the 2006 Honda Odyssey, including its symptoms, causes, and effective solutions. a May 24, 2023 K. The car cuts out when it Oct 4, 2021 · The reason so many people have trouble repairing this code is usually because they do not know how it is caused and do not do any testing. Customer: Code P2646 indicated the PCM detected that the variable cylinder management system was stuck in the Off position. Description: The VTEC system activates the VTEC solenoid valve from the engine control module (ECM)/powertrain control module (PCM) and it charges/discharges the hydraulic circuit of the VTEC mechanism that switches valve timing between Low and High. Hi everyone, My 2005 Honda Odyssey is getting the fault code: P2646: Rocker Arm Oil Pressure Switch Circuit – Low Voltage A bit of background on the vehicle: I bought it with about 115k km on and it's just had its 175k km service. What do I purchase? Mechanic's Assistant: Just to clarify, what's the exact code? And have you tried to reset it? Customer: P2646 and it's been reset twice and the car keeps pulsing when I try to accelerate past 2. A P2646 code in a Honda can have various symptoms, such as stalling or going into Limp Mode. Apr 10, 2024 · The fault code currently is P2646 (Powertrain A Rocker Arm Actuator Performance or Stuck Off Bank 1). But I would want to make sure that oil pressure is good, just in case. Check the VTEC oil pressure switch wiring and connectors for faults despite recent replacement. 37 V. Inspect the VSA module and wheel speed sensors for errors triggering the warning and power loss. I replaced the spool valve assembly again, this time with genuine Honda part number 15810-RAA-A03 (last time I used whatever they had in stock at AutoZone). please help me. It can happen to a lot of honda models. P2646 means the system is stuck off, aka VCM is unable to engage, which ends up working in your favor anyway. ” Honda, Acura, and a couple other automakers use this definition. 1/2 mile down the street was an autozone. Jan 7, 2020 · P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Accord. Was able to limp it home and now the troubleshooting begins. Jul 15, 2025 · Scan showing a P2647 code? Your VTEC system has a problem. To say it in a different way, if we ever have a situation where VTEC SOL=ON and VTEC PRESS SW=ON, that means a P2646 code will May 1, 2023 · 2007 Honda Odyssey EX-L - engine is J35A7 – VCM I started getting the CEL with P2646 and the VSA and "!" lights would eventually appear, limiting the engine to 3500 rpm. MIL Comes ON with DTC P2646/P2651 or P2647/P2652 (Supersedes 13-021, dated February 28, 2013, to revise the information highlighted in yellow) So getting the P2646 trouble code means that the electronic control module of your vehicle has detected some problem in getting feedback from the rocker arm actuator. May 31, 2023 · The P2646 is a "A' Rocker Arm Actuator System Performance / Stuck Off Bank 1" DTC, means there is an too low oil pressure, either the oil pressure switch has a mal function, or the VTEC system or the oil filter inlay is stuck. 5 rpm Mechanic's Assistant: What is the model/year of your . Learn how to diagnose and troubleshoot issues related to this engine error, ensuring optimal performance and longevity for your vehicle. Learn what Rocker Arm Oil Pressure Switch Circuit Low Voltage means, location and how to repair. Learn what 'A' Rocker Arm Actuator System Performance/Stuck Off Bank 1 means, location and how to repair. org/causmore P2646 means a problem with the ‘A’ Rocker Arm Actuator. P2647 Honda – VTEC rocker arm oil pressure switch high voltage P2647 is a Honda-only trouble code. I replaced screens on solenoids and one extra under the lid. DTC P2646 is defined as “Rocker Arm Actuator A, Bank 1, Performance or Stuck Off. It serves the purpose of monitoring and regulating the oil pressure within the rocker arm assembly. How to fix P2646 Code: "A" Rocker Arm Actuator Control System Performance/Stuck Off (Bank 1)A P2646 code is set when the computer (ECM/PCM) does not receive May 21, 2020 · So my '06 EX-L started an engine light and VSA light. Jan 4, 2024 · Hi, new to forum and really appreciate all the tech folks that help out here. Dec 27, 2015 · I recently experienced the infamous "Flashing D" problem in my 2010 RT, which is another problem for another thread. Check your windshield wiper nozzles. 4L (EASY FIX AND LESS THAN $5) 2007-2013 Acura MDX Oil pump resealing / replacement VTEC Repair P2647 Or 2646 (Pressure Circuit Voltage High Or Low) The P2646 code relates to the rocker arm actuator system, causing engine shaking under load. I have a 2006 Honda Odyssey 3. Start by inspecting the oil control valve (OCV) for clogging or electrical faults. This code is typically found in vehicles with variable valve timing (VVT) systems, which are responsible for adjusting the timing of the opening and closing of the intake and exhaust valves. Cleared it with OBDII scanner and Dec 19, 2024 · Discover the meaning of the P2646 code for Honda Accord vehicles, which indicates a problem with the VTEC oil pressure switch. Feb 13, 2024 · IF, AFTER ALL OF THAT, YOU STILL HAVE A RETURNING P2646/47 CODE, THEN YOU MAY CONSIDER PROCEEDING WITH THIS BYPASS. jzrnarwmjqyftfectcderyqvadrotjzufhkpvjtndatdduvedbwdsfpfrveqhbpjzuymhqw