P0655 OBD Error Code: Problem & Solutions

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P0655 fault code can be defined as Engine Hot Lamp Output Control Circuit Malfunction. If the powertrain control module would detect an abnormal voltage reading coming from the engine hot lamp output circuit, then the P0655 trouble code would start appearing.

This fault code indicates that the circuitry which is meant to relay a pending engine overheats has started facing some issues related to the voltage. It would mean that there is some fault in the circuitry that operates this system. This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

What causes this problem with the Engine Hot Lamp Output Control Circuit Malfunction?

• There can be some defects in the circuitry in the system due to corroded, broken or loose wiring or connections between the PCM and the sensor
• Some quirks in the engine temperature sensor
• The powertrain control module might be faulty
• Malfunction in the engine over temp indicator bulb

1. Powertrain Control Module - The P0655 code can also arise due to some issues in Powertrain Control Module. So, it is advised to replace them as soon as possible.
2. Engine Control Module - Do you remember when was the last time you got your car engine control module checked up? A damaged engine control module can cause a lot of issues like displaying P0655 code.
3. ABS System Parts - ABS System Parts should never be neglected. May be there is some fault ABS System Parts due to which P0655 code may start flashing.
4. Electronic Control Unit - Is your Electronic Control Unit damaged or broken? Don’t worry as we have solutions for all your problems.
5. Automatic Transmission Sensor - Defective car Automatic Transmission Sensor can be a major reason why P0655 code depicts. So, make sure to replace it online so that you don’t have to face any further issues.

Willing to know some common symptoms of OBD Trouble Code P0655? Your wish is our demand. Have a look at them below:

Common Symptoms

• Illumination of the check engine light
• The engine temperature indicator can start triggering up

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0655:

• You must begin by checking the code by using a scanner and after that reset the code
• Then the next step would be to road test the vehicle
• All the electrical connections should be visually inspected
• Make sure to repair and reinstall the defective, disconnected or corroded components, wires, or connectors
• The defective PCM should be replaced

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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 error code P0655 can be diagnosed by using an OBD-II scanner
• Just make sure to pay attention to other codes relating to engine temperature which may have been stored before the P0655 trouble code
• Then the next step is to record the freeze frame data and then the vehicle should be taken out for a road test
• After that the wiring and connections should be visually inspected
• Replace or repair the components, fuses, wiring and connectors as per the requirement
• The issue can be identified by retesting the system and utilizing the freeze frame data as well as codes
• You can always replace the parts as per the requirement
• The powertrain control module should be reprogrammed
• If there are any open or shorted circuits, then you must repair them properly

Common Mistakes When Diagnosing The P0655 Code

Diagnostic errors tend to occur when a mechanic does not compare their findings against a manufacturer's reference values. Additionally, it is important to perform a close visual exam to find any loose connectors that cause such codes as the P0655 to be stored. A common misdiagnosis is to replace the engine coolant temperature sensor though it is the PCM driver that is causing the problem.

P0654 - Engine RPM Output Circuit Malfunction