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P0602 is a diagnostic trouble code (DTC) for "Control Module Programming Error". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
When the Powertrain Control Module stores a P0602 trouble code, it usually indicates a programming error in one of the control modules, including the transmission control module, the antilock brake control module, the anti-theft module, the body control module, the climate control module, the cruise control module, the fuel injection control module, the instrument panel control module, proximity alert module, the traction control module, and the turbo control module. Additional, related codes include P0601, P0603, P0604, and P0605.
A P0602 trouble code signifies problems with a control module, in addition to a programming error within the one of the control modules. The mechanic should keep in mind that some vehicles require multiple drive cycles, upwards of eight, before the check engine light is lit, though the PCM still stores the code upon first occurrence.
A poor electrical connection or defective driver in the PCM are the most likely causes for this code to be stored. Additionally, corroded, damaged, or faulty wiring or connectors within the Control Area Network (CAN) Bus harness or a loose or broken wire or ground strap can also cause this code. A defective CAN Bus is also sometimes to blame.
Symptoms of a P0602 trouble code include problems driving and shifting, engine stalls, and rough idling. In addition to these symptoms, cars with this stored code also suffer from poor acceleration and a decrease in the vehicle's fuel economy.
To diagnose a P0602 trouble code, the mechanic needs to complete the following steps while using an appropriate OBD-II scanner and a digital volt/ohmmeter:
Common mistakes by mechanics when diagnosing a P0602 trouble code include mistaking another code, such as codes dealing with engine misfires, lean exhaust, or the fuel injector, as the cause of the vehicle's problems. This misdiagnosis can lead to an unsuccessful repair and a return of the code. Mechanics can avoid this misdiagnosis by repairing and clearing all trouble codes in the order they were stored on the PCM.
In addition to decreases in vehicle performance, such as acceleration, shifting, and idling, a P0602 trouble code can also affect fuel mileage, making the vehicle less efficient.
Once the mechanic has diagnosed the problem, they should set about repairing the vehicle and trying to clear the P0602 trouble code. This process includes making the following repairs if needed:
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.