Code 42, Crank Angle Sensor Circuit, No Signal For 3 Seconds: Notes

ECM receives a signal from Crank Angle Sensor (CAS) in distributor. This CAS signal is used to control spark advance. If CAS signal is lost, ignition timing will be fixed. Code 42 will set if CAS signal is not present with engine cranking, or if signal is lost after engine is started.

1. Checks to see if problem is in crank angle sensor and its wiring, or faulty ECM.
2. Checks for an open in White wire.
3. Checks for an open in Blue/Black wire.
4. Checks for poor ground connection and open Black/Green wire, or misadjusted or faulty crank angle sensor.