Communication Error

When starting a diagnostic test or accessing Parameter Identification (PIDs) data, it is possible to receive a communication error from the scan tool. A communication error may be caused by operator error, vehicle wiring malfunction, connector problem, PCM malfunction, or other vehicle control modules. The scan tool may display a 2 digit number identifying a communication error code. The scan tool may also display a 2 digit code to a normal (valid) request (these codes require no action). If the scan tool displays an error code, check scan tool connections and verify proper entry of vehicle data. Follow equipment manufacturers instructions to remedy an error code.