Error Code P0654: What It Means & What To Do?

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The P0654 trouble code would appearing when the PCM would detect a voltage reading from the engine RPM output circuit which is not acceptable as per the parameters set by the manufacturer.

The P0654 fault code can be defined as Engine RPM Output Circuit Malfunction.

Want to learn something more about this fault code?

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 RPM Output Circuit Malfunction?

• Malfunctioning crankshaft or camshaft sensor
• The powertrain control module might be inaccurate
• Inoperative instrument cluster
• There can be an open or shorted instrument cluster harness
• Damaged tachometer

1. Fuel Injection Harness/Wiring - OBD Code P0654 can appear because of faulty Fuel Injection Harness/Wiring.
2. Fuel Injector - There can be some issues with the Fuel Injector due to which you may see P0654 code appearing over and over again. Visit us to buy best quality Fuel Injector online.
3. Powertrain Control Module - Are you facing some faults in your Powertrain Control Module? Don’t worry and get them replaced or else P0654 code can turn up.
4. Engine Control Module - Common cause behind this P0654 error code can be some fault in Engine Control Module. So, it will be a good decision to replace them now.
5. Throttle Body - Engine Control Module is perfectly fine but still but having that trouble code P0654 flashing? In such a situation your Throttle Body might be faulty. Why don’t you think of getting that replaced?

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0654 here:

Common Symptoms

• Check engine light can start flashing up
• There can be an inoperative or erratic tachometer
• Car engine might not start at all

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 P0654:

• If there are any faults in the system circuitry, then it should be repaired properly
• You can always replace the loose, corroded, or broken electrical components
• The defective instrument cluster should be replaced
• Make sure to repair an open or shorted instrument cluster harness
• Restore a faulty tachometer
• Quirky crankshaft or camshaft sensor should be repaired or replaced as per the need
• It is very important to replace the flawed powertrain control module

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

• If you want to diagnose the P0654 code, the mechanic should start by verifying the code with an OBD-II scanner
• After the code has been fully verified, then a visual inspection of all electrical components, such as wiring and connectors should be performed by the car mechanic
• The most common reason behind the triggering up of this error code are the defective electrical components, that is the reason why there is a need for a proper examination
• Repair the loose, corroded, or defective components and after that the codes should be cleared from the powertrain control module
• Then you must retest the entire system
• Now if you notice that the code is appearing even after the repair, then it means that a more complex issue within the engine RPM output circuit or related components has been diagnosed by the mechanic
• You will require a specialized scanner to pinpoint the exact area which is causing issues
• The technician should carefully inspect each component for voltage readings, comparing those to the manufacturer’s specifications unless and until he has discovered the part which is not functioning properly

Common Mistakes When Diagnosing The P0654 Code

• Many a times the mechanic might blame the tachometer to be defective, but in reality it is the PCM driver which actually has some faults

P0655 - Engine Hot Lamp Output Control Circuit Malfunction