P0659 OBD Error Code: Problem & Solutions

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Error code P0659 can be identified as Actuator Supply Voltage "A" Circuit High.

The P0659 trouble code indicates that there is some fault in the vehicle’s actuator supply voltage “A” circuit. This fault can be detected by the powertrain control module.

There can be some other control modules as well which might detect this fault code like instrument panel control module, the anti-lock brake control module, the traction control module, the fuel injection control module and many others.

Do you want to know 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 Actuator Supply Voltage "A" Circuit High?

• Wiring and connectors between control modules or powertrain control module input circuitry might be shorted, open or defective
• Flaws in the powertrain control module

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2. Powertrain Control Module - A broken Powertrain Control Module can cause a lot of issues. It would be nice if you get it replaced on time.
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It is vital 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 P0659 here:

Common Symptoms

• The overall fuel efficiency might start diminishing
• Issue of engine misfire
• There can be lack of electrical power in the vehicle
• Flashing up of the check engine light on the dashboard of the vehicle

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• Firstly, you should replace the powertrain control module
• The supporting control module should be repaired or replaced
• Restore the defective connections between control modules
• Make sure to replace the missing or damaged wires surrounding “A” area of circuit

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Here are some steps which you should follow in order to diagnose this fault code:

• You must use an OBD-II scanner to easily diagnose the P0659 error code. Just make sure to pay attention to other codes relating to engine temperature which may have been stored before the P0659 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 P0659 Code

While the main cause of the P0659 code that is accurately stored is an issue with the vehicle’s actuator supply voltage “A,” the code may have been improperly or inaccurately stored due to a malfunction within the powertrain control module system. Because of this, any qualified mechanic will attempt repairs within the actuator supply voltage system and interior wiring before considering an issue with the powertrain control module (unless, of course this code comes in simultaneously with other powertrain control module issues.)