There is a communication error in the PCM serial data link.
Have this diagnosed before driving further
Informational only. Consult a qualified mechanic.
Have the PCM and its wiring inspected by a professional.
The P0600 OBD-II diagnostic trouble code (DTC) indicates: serial communication link. This is a high-severity powertrain code that your vehicle's onboard diagnostics system triggers when there is a communication error in the pcm serial data link. If your check engine light is on with this code, you should have the vehicle inspected immediately before driving further.
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