The engine control module (ECM) uses the crankshaft position (CKP) sensor and the intake and exhaust camshaft position (CMP) sensor information to monitor the correlation between the crankshaft, intake, and exhaust camshaft position.

The ECM detects that the CMP sensor pulses occur less than 9 or more than 12 crankshaft degrees outside of the normal position for 24 out of 30 engine cycles.

DTCs P0016 and P0017 are Type B DTCs.

DTCs P0016 and P0017 are Type B DTCs.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Note: The scan tool control of the CMP actuator is inhibited when DTC P0016 or P0017 sets.

1. Command each CMP actuator to 25 percent. The CMP actuator angle desired parameter should match the CMP actuator actual parameter.
2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Note: Incorrect engine oil viscosity, aftermarket engine oil additives, or engine oil that is overdue for changing, can greatly affect the performance of the camshaft actuator.

1. Ignition OFF, inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications.
2. Remove the CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement.
3. Connect a fused jumper wire between the CMP actuator high control circuit terminal A at the solenoid and B+. Connect a jumper wire to the CMP actuator low reference circuit terminal B at the solenoid. Momentarily touch the jumper wire to ground. Observe the spool valve inside the CMP actuator. The spool valve should move from fully closed to fully opened position.

⇒	If the spool valve inside the CMP actuator solenoid does not move, replace the CMP actuator solenoid.

4. Inspect the CMP actuator for binding or being stuck.
5. Inspect the engine for the following conditions:

•	An incorrectly installed camshaft sensor

•	An incorrectly installed crankshaft sensor

•	An incorrectly installed camshaft actuator

•	Incorrect valve timing

•	A loose camshaft reluctor wheel

•	A loose crankshaft reluctor wheel

•	Excessive crankshaft end play

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.