Possible Causes

Malfunction is detected when:

Either CMP sensor signal is not sent to ECM for the first few seconds during engine cranking.
Either CMP sensor signal is not sent to ECM often enough when engine is running at a specified speed.
Relation between 2 CMP sensor signals is not in the normal range when engine is running at a specified speed.

Possible causes are:

CMP sensor circuit is open or shorted.
Defective CMP sensor.
Defective starter motor.
Faulty starting system circuit.
Dead (weak) battery.

NOTE: Perform the following DTC confirmation tests in order. If a DTC confirmation test has been previously performed, turn ignition off and wait at least 5 seconds before performing next DTC confirmation test.

NOTE: Before proceeding, ensure battery voltage is more than 10.5 volts at idle.