It gives me the code p2649

What can be the problem for my Honda pilot it gives me the code p2649 and it said that it can b the rocker arm valve can someone please help me

My car has 210457 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello, thank you for writing in. The vehicle has rocker arms that control the valves where the fuel and air enter the engine, and the valves that channel the exhaust gasses out of the engine. With these rocker arms are actuators that push the rocker arms based on mechanical lobes on the camshaft that are responsible for the valve timing. The actuators can become clogged, stick, and restrict the function of the rocker arm, which on your vehicle is monitored electronically. The code you are receiving is letting you know this is the case, and you need to take corrective action. You may only need an oil and oil filter change, or there may be a more serious issue going on. Only further inspection will tell, and you should have it looked as ASAP. For more help, contact our service department to schedule an appointment.

How to Identify and Fix Common car Problems ?

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P2649, which is specific to Honda vehicles, is one of these DTCs. It indicates a problem with the performance of bank 1 of the rocker arm actuator control system. Oil flow to the rocker`s arm is controlled by a solenoid valve called a valve lifter or rocker arm oil control solenoid valve.
The ECM detects a problem in the rocker arm system for bank 1. 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.
OBD-II Code P2649 is defined as a “A” Rocker Arm Actuator Control Circuit High. The Rocker Arm Control Solenoid supplies hydraulic pressure to the Variable Timing mechanism. This allows the Variable Timing System to adjust valve timing as needed.
What the P2649 code mean. P2649 is an OBD-II code for the engine control module (ECM) detecting the `A` rocker arm actuator control circuit for bank 1 has voltage is high. This indicates a short to power in the actuator circuit.
P1259 code indicates VTEC System Malfunction.
The rocker arm actuator is an oil pressure switch which controls the flow of oil to critical upper engine cylinder head components.
The importance of correct Honda valve clearances can`t be over-stressed, as it can directly effect the performance and life of the engine. If the valve clearances are excessive, then the efficiency of the engine is reduced because the valves open later and close earlier than they were designed to.
Can I Still Drive with a P2646 Code? Since the P2646 code can cause the variable valve timing system in your engine to potentially cease working altogether, driving for prolonged periods is not recommended by qualified technicians.
The trouble code P2645 can be elucidated as A Rocker Arm Actuator Control Circuit/Open Bank 1. If this error code would start appearing, then it would mean that there is an open circuit or a short which has been detected in the rocker arm actuator control circuit for the exhaust A camshaft in engine bank 1.
What does OBD-II fault code P2642 mean? The Transmission Control Module and the engine computer (PCM) constantly talk to each other to ensure that they are working together to produce the desired power output. If the two modules fail to communicate with each other, code P2642 is set.
P2648 code definition

The P2648 code refers to a short or open electrical circuit in the rocker arm actuator control circuit for intake “A.”

In vehicles equipped with VTEC systems, the rocker arm control solenoid supplies hydraulic pressure to the variable timing and lift mechanism. This allows the VTEC system to adjust valve timing and lift as needed, and the ECM uses the rocker arm oil pressure switch to monitor and verify the oil pressure.
The exhaust valve control solenoid is part of the variable valve timing system. P0084 code is set when the ECU tries to control the exhaust valve timing on bank 2 and detects a fault. This fault triggers a Check Engine Light to be seen on the dashboard and a failsafe mode to be activated.
The exhaust valve control solenoid is part of the variable valve timing system. P0084 code is set when the ECU tries to control the exhaust valve timing on bank 2 and detects a fault. This fault triggers a Check Engine Light to be seen on the dashboard and a failsafe mode to be activated.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

I have a Code P0601 on the PCM. I replaced the PCM, and now I have a code P0118, code P0123, and code P0193.
ANSWER : Hi there, the short answer to your question is no . A PCM with a P0601 (which is a memory module error in the PCM) cannot reliably retrieve codes for the codes you list (P0118 – coolant temp sensor, P0123 – throttle position sensor, P0193 – fuel rail pressure sensor.

Most likely, the P0601 prevents the PCM from getting any codes from the engine sensors. The memory module error may cause in data corruption for collected sensor values, lose of data over multiple sampling periods, or failure of the data collection to work at all. Replacing the PCM was a necessary expense.

If you need assistance with the "new" codes, I would recommend having a Check Engine Light inspection completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose the new error codes and get an accurate assessment of the repairs needed.

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Can i retrieve CEL code from car … forgot what code it hade in my car .. put headgasket sealer and i erase the code ..
ANSWER : Once a trouble code is erased, it cannot be retrieved. The engine controller does not have a "recycle bin" like they have on Windows. If the car still has a problem, the code will come back up after some driving. However, the controller will not turn on the CEL until it has seen the malfunction on two separate "trips." A "trip" is a driving cycle where the car is started cold, driven until it is fully warm and through a certain number of accelerations, and shut down. So you might not see the CEL for a couple of days. As for the "head gasket sealer," I wouldn’t hold out too much hope of that solving a problem. At the very best it might put off the symptoms for a short while. If you need help interpreting codes that come up, or solving a head gasket issue, contact Your Mechanic. They can send a technician to your home or office to read the codes on your car and help you decide what to do.

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It threw a code 21 , throttle position sensor bad code. i replaced it and the code went away but i still have no spark.
ANSWER : Hello and thank you for contacting YourMechanic. The problems that you are encountering with your vehicle, could be caused by the harness to the Throttle Position Sensor (TPS) or the computer itself.

Check the harness to the TPS for any debris or any corrosion. Hook up a paperclip to the harness and turn on the key. Use a multimeter and check for voltage at the pins of the harness. Make sure that the ground on the sensor is grounded and has no resistance. If you find that the harness is having too much resistance, then I recommend having the main engine harness replaced. If you have replaced the harness and still have the same problems, then the computer will need to be flashed or replaced.

I recommend having a professional, like one from YourMechanic, come to your home to diagnose your car’s no start condition before replacing any parts.

Read Full Q/A … : It gives me the code p2649

Check Engine Light codes. 2006 Mercedes Benz E55 AMG
ANSWER : Since you are getting many different codes from different areas of the engine, you may need to have the system hooked up to a factory scanner since most of these generic codes do not cross over in my repair software. I would also check with the local dealer to see if any service campaigns are open on the vehicle since there are over 30 possible campaigns that could pertain to this vehicle and some of the problems you are having with the secondary air system. This may be the cause of some of the codes and supercharger disabling. If you’d like to have this checked elsewhere, a qualified pro from YourMechanic can come to your car’s location to go through each Check Engine Light code firsthand and have them resolved.

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Service engine warning, MAF code and O2 sensor code, along with check suspension light are turned on
ANSWER : Hello, it sounds like you have quite a few things going on. I am going to do my best to break them down for you.

First if the engine is very loud when idling and the belt has already been replaced, there may be an issue with the tensioner or idler pulley.
Next, the Navigator is known for needing service to the air suspension system as it gets up in miles, the most common causes of these are the air struts themselves have failed, or one of the air lines has a leak.
Lastly, if the O2 sensor and MAF are continually coming back after the sensors have been replaced, the most common cause would be either an exhaust leak or a vacuum leak.

Qualified technicians such as the ones at YourMechanic will be able to diagnose these issues and recommend the best path to repair, starting with a diagnosis of your warning lights.

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EGR code, Cylinder 4 misfire code 0304 detected.
ANSWER : Hi there. The Exhaust Gas Recirculation (EGR) valve may be not designed for the emissions requirements for U.S. standards. If the EGR is pulling from cylinder number 4 and after replacing the EGR and the computer detects a misfire, then the EGR is malfunctioning and not responding. When you close off the tube to the EGR and the EGR light comes on and the misfire light goes out, then the EGR is not responding to your emissions system. I recommend replacing the EGR with the OEM specified part for the engine and all of the issues should go away. If you need further assistance with your misfire and EGR, then seek out a professional, such as one from Your Mechanic, to help you.

Read Full Q/A … : It gives me the code p2649

It gives me the code p2649
ANSWER : Hello, thank you for writing in. The vehicle has rocker arms that control the valves where the fuel and air enter the engine, and the valves that channel the exhaust gasses out of the engine. With these rocker arms are actuators that push the rocker arms based on mechanical lobes on the camshaft that are responsible for the valve timing. The actuators can become clogged, stick, and restrict the function of the rocker arm, which on your vehicle is monitored electronically. The code you are receiving is letting you know this is the case, and you need to take corrective action. You may only need an oil and oil filter change, or there may be a more serious issue going on. Only further inspection will tell, and you should have it looked as ASAP. For more help, contact our service department to schedule an appointment.

Read Full Q/A … : It gives me the code p2649

My truck is giving codes P0171 & P0174
ANSWER : Hi there. If the engine is running lean, then there could be a plugged fuel filter or a faulty fuel pump with loss of pressure. If the pressure is dropping after 20 to 25 minutes, then there could be a problem with the fuel pump check valve. When the pressure is at 0, having a pressure gauge on the fuel rail, check for the pressure to increase as the fuel pump is turned on when the key is turned on.

If the pressure takes some time before it stops, then the check valve in the pump is sticking open. This means the fuel pump should be replaced. If the fuel pressure is measured very quickly, then replace the fuel pressure regulator on the fuel rail. If you need further assistance troubleshooting your vehicle, then seek out a certified technician, such as one from YourMechanic, who can come to your location to determine why the engine is running at a lean condition and suggest the necessary repairs.

Read Full Q/A … : It gives me the code p2649