The mechanic should install some sort of memory saving device or run the risk of having to reprogram the PCM and other control modules if a probe is misplaced.The mechanic should test any circuitry while the vehicle is in operation for best results. Otherwise, the diagnostic process can become time consuming and cost prohibitive for the mechanic. If the code returns, the mechanic should connect a specialized scanner, such as one from Autohex or Tech 2, to try and determine the cause of the code storage more quickly.The mechanic should clear the code and then test drive the vehicle to see if the code returns.This information can come in handy when trying to determine the order in which the trouble codes were stored. Download any freeze frame data and stored trouble codes.

Inspect all wiring, connectors, and components, looking for any loose connections or damage.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: How does a mechanic diagnose the P0602 code? In addition to these symptoms, cars with this stored code also suffer from poor acceleration and a decrease in the vehicle's fuel economy. Symptoms of a P0602 trouble code include problems driving and shifting, engine stalls, and rough idling.

A defective CAN Bus is also sometimes to blame. 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. What causes the P0602 code?Ī poor electrical connection or defective driver in the PCM are the most likely causes for this code to be stored. 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. What the P0602 code meansĪ P0602 trouble code signifies problems with a control module, in addition to a programming error within the one of the control modules. 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.

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