When is a rocker arm actuator stuck on?
If the PCM detects a level of resistance from the rocker arm actuator circuit indicating that it is stuck in the on (valve open) position, a code P2647 will be stored and a malfunction indicator lamp may be illuminated. What are the common causes of code P2647? What are the symptoms of code P2647? How do you troubleshoot code P2647?
What is the pressure switch on a Honda p2647?
P2647 HONDA | Rocker Arm Oil Pressure Switch Circuit High Voltage | The VTEC system activates the rocker arm oil control solenoid (VTEC solenoid valve) by command from the engine control module (ECM)/powertrain control
What does p2647 mean in engine control module?
P2647 Meaning The Engine Control Module (ECM) commands the Rocker Arm Actuator to control the oil hydraulic circuit. Oil flows through the Rocker Arm Actuator to the variable valve timing system to adjust the engine’s valve timing. The variable valve timing (VVT) system is used to improve engine’s performance, fuel economy or emissions.
What is the p2647 error code for Honda Accord?
The check-engine-light came on and gave a P2647 error code. This post walks step-by-step through the easy fix. I hope you find this helpful! The vehicle I am working on here is a 2004 Honda Accord (4-cyl).
If the PCM detects a level of resistance from the rocker arm actuator circuit indicating that it is stuck in the on (valve open) position, a code P2647 will be stored and a malfunction indicator lamp may be illuminated. What are the common causes of code P2647? What are the symptoms of code P2647? How do you troubleshoot code P2647?
P2647 HONDA | Rocker Arm Oil Pressure Switch Circuit High Voltage | The VTEC system activates the rocker arm oil control solenoid (VTEC solenoid valve) by command from the engine control module (ECM)/powertrain control
P2647 Meaning The Engine Control Module (ECM) commands the Rocker Arm Actuator to control the oil hydraulic circuit. Oil flows through the Rocker Arm Actuator to the variable valve timing system to adjust the engine’s valve timing. The variable valve timing (VVT) system is used to improve engine’s performance, fuel economy or emissions.
The check-engine-light came on and gave a P2647 error code. This post walks step-by-step through the easy fix. I hope you find this helpful! The vehicle I am working on here is a 2004 Honda Accord (4-cyl).
What does code p2647 on OBD-II mean?
What Does Code P2647 Mean? When an OBD-II equipped vehicle has stored a code P02647, it means that the powertrain control module (PCM) has detected a valve train (rocker arm) malfunction for engine bank one. Bank 1 denotes that the problem has occurred in the bank of the engine which contains the number one cylinder.
How does the VTEC system control the rocker arm?
The VTEC system controls the rocker arm control solenoid through the powertrain control module (PCM). The PCM uses the rocker arm oil pressure switch to monitor and verify the oil pressure so the variable timing mechanism can be properly activated.
What is the OBD code for the rocker arm?
If the PCM does not receive the correct voltage signal back from the rocker arm oil pressure switch, it may set code P2646. The “A” in this OBD code’s definition indicates the intake camshaft.
What Does Code P2647 Mean? When an OBD-II equipped vehicle has stored a code P02647, it means that the powertrain control module (PCM) has detected a valve train (rocker arm) malfunction for engine bank one. Bank 1 denotes that the problem has occurred in the bank of the engine which contains the number one cylinder.
The VTEC system controls the rocker arm control solenoid through the powertrain control module (PCM). The PCM uses the rocker arm oil pressure switch to monitor and verify the oil pressure so the variable timing mechanism can be properly activated.
If the PCM does not receive the correct voltage signal back from the rocker arm oil pressure switch, it may set code P2646. The “A” in this OBD code’s definition indicates the intake camshaft.
What does DTC stand for in rocker arm actuator?
DTC P2646 is defined as “Rocker Arm Actuator A, Bank 1, Performance or Stuck Off.” Honda, Acura, and a couple other automakers use this definition.
What is the rocker arm actuator on a Honda?
The electronic control module regulates various actuators on the internal combustion engine and one of the actuators that ECM regulates is the rocker arm actuator. A rocket arm actuator system is a switch that controls the flow and pressure of oil in the engine and it also consists of oil passages. What causes the P2646 trouble code?
What does Bank 1 mean on Honda trouble code?
Bank 1 in the definition indicates the engine side where the cylinder 1 is present and the letter ‘A’ indicates the Intake camshaft. 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.
What does it mean when your rocker arm is stuck?
P2647 – Rocker Arm Actuator Control System Stuck On P2646 – Rocker Arm Actuator System Performance/Stuck Off Bank 1 These errors relate to the VTEC solenoid. This is a really interesting mechanism! Read more details on the VTEC system.
What is the diagnostic trouble code for rocker arm?
P2646 is a diagnostic trouble code (DTC) for “‘A’ Rocker Arm Actuator System Performance / Stuck Off Bank 1”.
Why is my DTC p2646 rocker arm not working?
Depending on year, make, and model, DTC P2646 may have number of causes. Here are some of the most common. Oil Problems – Low oil level, incorrect oil viscosity, or thinned oil can all cause problems with the VTEC system.
What causes the rocker arm actuator to be clogged?
The oil passages are clogged or the oil pressure is not up to specifications. The rocker arm actuator is clogged with sludge or is sticking intermittently. The engine may have excessive sludge binding the rockers from moving or the oil is too thick.
The P2646 code indicates the problem with the rocker arm actuator which means either the actuator is not working properly or it is stuck in the off position. Bank 1 in the definition indicates the engine side where the cylinder 1 is present and the letter ‘A’ indicates the Intake camshaft.
What can I do to fix the p2646 code?
What repairs can fix the P2646 code? 1 Replacing the ‘A’ rocker arm actuator 2 Repairing the wiring harness or connector to the actuator 3 Changing the oil and filter to the correct viscosity oil 4 Flush the engine passages of sludge from lack of oil changes
What is the p2647 error code for Honda?
As soon as the tachometer touched 2700 rpm, the car bucked and the check engine light (CEL) came on! Luckily I had my trusty engine code reader handy, so I pulled over and read the error code. The error was P2647. A related error is P2646. P2647 – Rocker Arm Actuator Control System Stuck On
Is there an easy fix for the p2647 error code?
It is a relatively inexpensive method to help clear sludge from your engine and has been known to eliminate the P2647 issue. No signal getting to the VTEC – Vehicle feels ‘gutless’ at high RPM
How does the ECM monitor the rocker arm actuator?
The ECM monitors the Rocker Arm Actuator circuit and sets the OBDII when the ‘A’ Rocker Arm Actuator circuit is out of factory specifications. Need more information on how to fix the P2646 code?
What is trouble code for rocker arm actuator?
The definition of this code is ” ‘A’ Rocker Arm Actuator System Performance/ Stuck off Bank 1″. So as you can see, it is very difficult to understand anything about this code with just this definition so in case you are getting this trouble code this article will be very informative to you.
The ECM monitors the Rocker Arm Actuator circuit and sets the OBDII when the ‘A’ Rocker Arm Actuator circuit is out of factory specifications. Need more information on how to fix the P2646 code?
How much does it cost to repair a rocker arm?
Most auto repair shops charge between $75 and $150 per hour. The Engine Control Module ( ECM) commands the Rocker Arm Actuator to control the oil hydraulic circuit. Oil flows through the Rocker Arm Actuator to the variable valve timing system to adjust the engine’s valve timing.
What to do if your rocker arm is stuck?
Replacing the VTEC oil pressure switch usually fixes the problem. If it doesn’t, then press on with normal troubleshooting. Took it to the shop, $150 later for VTEC oil pressure switch and everything is fine. Thank you everyone for your help! I have the same symptoms with my Honda CRV 2005.
DTC P2646 is defined as “Rocker Arm Actuator A, Bank 1, Performance or Stuck Off.” Honda, Acura, and a couple other automakers use this definition.
Replacing the VTEC oil pressure switch usually fixes the problem. If it doesn’t, then press on with normal troubleshooting. Took it to the shop, $150 later for VTEC oil pressure switch and everything is fine. Thank you everyone for your help! I have the same symptoms with my Honda CRV 2005.