Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Engine may not start

Possible Causes

- Short in Park and Neutral Position (PNP) switch assembly circuit - Park and Neutral Position (PNP) switch assembly - Ignition switch - ECM

When Detected

If the vehicle is being driven and the ECM detects the starter control signal (STA), the ECM concludes that the starter control circuit is malfunctioning. The ECM will turn on the MIL and will set a DTC.

Description

While the engine is being cranked, the battery positive voltage is applied to starter terminal of the ECM.