Conditions Which Generate This Code:
The signal for the primary engine speed/timing sensor is intermittent or lost for less than one second.
System Response:
The Electronic Control Module (ECM) will use the secondary engine speed/timing sensor in order to determine engine speed. The ECM will log the diagnostic code.
There may be a slight change in engine response when the ECM is switched to the secondary engine speed/timing sensor.
Test Step 1. Perform the following diagnostic procedure: Engine Speed/Timing Sensor Circuit – Test
Results:
- OK – STOP