Guide To P2655 OBD Error Code Solutions

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See the error code P2655 flashing? Here we have listed all that you need to know about this OBD error code. The rocker arm actuator is under the command of the engine control module (ECM) to control the oil hydraulic circuit. To adjust the engine’s valve timing, oil flows through the rocker arm actuator to the variable valve timing system.

The variable valve timing (VVT) system is used to bring about improvement in engine’s performance, fuel economy or emissions. The rocker arm actuator circuit is regulated by the ECM. The ECM also sets OBD-II when the ‘A’ rocker arm actuator circuit is out of factory qualifications.

What causes this problem with the Rocker Arm Actuator Control Circuit/Open Bank 2?

• Wrong engine oil type
• Engine oil is either overfilled or low
• Faulty ‘A’ rocker arm actuator
• Open or damaged ‘A’ rocker arm actuator harness
• Powerless electrical connection running in the ‘A’ rocker arm actuator circuit

1. Engine Control Module - Rough idling? Engine sputtering? Yes, all this happens only after there is a fault in the engine control module. Now get yours delivered right at your doorstep with Parts Avatar now!
2. Rocker Arm - Facing the error code P2655? An inferior quality rocker arm can always be hazardous for the system also it is one of the primal causes behind the occurring of the error code P2655. Tune into Parts Avatar for supreme quality rocker arm at economical prices.
3. Variable Valve Timing Unit Gasket - It is through the variable valve timing unit gasket the efficiency of the engine operating speeds is monitored. We advise you to get it changed or repaired if it is malfunctioning. Now get your variable valve timing unit gasket delivered right at your doorstep with Parts Avatar.
4. Engine Wiring Connectors - Corroded or loose engine wiring connectors can be troublesome. They not only invite the error code P2655 but also lead to problems like decrease in power and acceleration. Mend or restore them as soon as possible.
5. Powertrain Control Module - It is due to a defect in the powertrain control module, downward emissions are likely to follow besides other issues like a sluggish engine crank, failure in the emission system etc. We advise you to get your faulty PCM changed now by simply logging into Parts Avatar.

If you are facing OBD error code P2655, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better:

Common Symptoms

• Bad engine performance
• Rise in fuel consumption 

It is very important to fix the fault code P2655. So here are some ways with which you can correct this issue:

• Repair or replace a defective ‘A’ rocker arm actuator
• Amendments should be performed to mend or restore damaged ‘A’ rocker arm actuator harness
• Fix a weak electrical connection running in the ‘A’ rocker arm actuator circuit
• Make sure you check the engine oil type and the quantity of the engine oil present. Perform changes accordingly

To do all this, you will need few high-quality auto parts such as engine control module, rocker arm, valve timing, VVT, engine valve timing, wiring and so on. From where will you get them? From your local store? Well, why go there when you can order quality parts with us while sitting in the comfort of your home. So, just browse through our website and order your needed parts today.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

The electromagnetic sensors regulate the crankshaft and camshaft positions. The sensors make use of the relief holes present in the camshaft and crankshaft drive gears to offer signal interruption of the electromagnetic field. You can observe that the interruptions in the electromagnetic field are seen by the PCM as square waveform patterns. These denote varying degrees of voltage. Using the electromagnetic resistance in the 5-volt circuit, variations in voltage. Numerous crankshaft sensors are utilized to feed separate data streams to the PCM. These data streams supply input for engine ignition and fuel injection timing. A camshaft sensor for each camshaft is utilized by engines that are equipped with multiple camshafts. Various manufacturer’s utilize notches cut into shafts or nodules that are permanently linked to interrupt the electromagnetic field. One can locate these notches or nodules near the rear or middle of the shaft, depending upon sensor placement. Manufacturer’ at times, even positions the crankshaft sensor on top of the transmission bell-housing and reads crankshaft position from interrupter holes in the flex plate. Start a proper diagnosis with making sure that all engine timing indicators are properly integrated.

Now, that you have made sure that timing marks are aligned, the belt or chain deflection should be tested using manufacturer's provisions. Test the VVT or VCT solenoids and circuitry if timing components prove to be properly aligned and function in order. In rare case, there maybe a PCM failure. It should be noted that the electrical wiring and connectors are more inclined to fail than sensors where oil or other corrosive fluids are present. A number of tools will be instrumental in successfully diagnosing this code. Perform a successful diagnosis using a suitable OBD-II scanner (or code reader), a digital volt/ohmmeter, and an oscilloscope. It is essential to use a manufacturer's service manual (or the equivalent). Perform a visual inspection of all wiring and connectors. All the damaged, open, shorted or corroded wiring, connectors and parts should be repaired or replaced as necessary. Perform a retest of the system after repairs are completed to ensure success.

If in case all system wiring, connectors and electrical parts (including fuses) are functioning in normal working order, the scanner (or code reader) should be connected to the diagnostic connector to record all stored codes and freeze frame data. Record this information as it can be extremely helpful in treating intermittent conditions that may added to the code. Next, continue by clearing the codes and starting the vehicle to see if it returns. This further helps in determining whether or not the problem is intermittent. Now that you have cleared the codes, test drive the vehicle to see if the code returns. In case, the code fails to immediately return, you may have an intermittent condition. It is notable that these intermittent conditions can prove to be very challenging to diagnose and in extreme cases may have to be allowed to worsen before a correct diagnosis can be made. Next, the connectors should be disconnected from the affected sensor, to check for a reference voltage signal (usually 5-volts) and a ground at the connector end (key on/engine off). If no reference voltage and/or ground are detected, the connector should be disconnected from the PCM. Test all circuits for resistance and continuity. Refer to the manufacturer's service manual for wiring diagrams, technical service bulletins, and/or flow charts. All the circuits, connectors, or components should be repaired or replaced that fail to collate with manufacturer's specifications. After the repairs have been performed, clear codes and test drive the vehicle to make sure that the repair has been successful. In the presence of reference voltage and ground signals, the sensor should be reconnected and use the oscilloscope to monitor live data waveform patterns. Search for discrepancies in the waveform and replace the sensor if present.

After repairs and replacements have been performed, clear the codes and test drive the vehicle to make sure that your repair has been performed successfully. If wave for patterns are normal, a defective PCM should be blamed. A PCM failure is rare, and therefore replacements will require reprogramming too. Specific applications require camshaft and crankshaft sensor replacement in sets. Refer to the service manual for particular instructions.

Common Mistakes When Diagnosing the P2655 Code

• Here we have listed a few common mistakes that should be avoided while performing the diagnosis:
• Powertrain control module malfunction
• Failed variable valve lift controller assembly failure
• Wiring defects