P0016

DTC P0016 or P0017

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0016
- Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation

DTC P0017
- Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation

Circuit/System Description

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.

Conditions for Running the DTC

* DTCs P0335, P0336, P0340, P0341, P0365, P0366, P0641, and P0651 are not set.
* The engine is cranking or running.
* The engine speed is less than 1,200 RPM and the CMP actuator is commanded to the home or parked position.
* These DTCs run continuously when the above conditions are met.

Conditions for Setting the DTC

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.

Action Taken When the DTC Sets

DTCs P0016 and P0017 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0016 and P0017 are Type B DTCs.

Diagnostic Aids

Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, crankshaft, or timing chain can cause this DTC to set.

Circuit/System Verification

1. Operate the vehicle at idle and at various engine speeds and load ranges while observing the CMP Variance, Desired CMP, and CMP Angle parameters with a scan tool.
2. The CMP variance should remain less than or equal to 1 degree unless the CMP actuator is being commanded. If the CMP actuator is commanded, the CMP variance will rise for 1-2 seconds until the CMP Angle parameter matches the Desired CMP parameter. The CMP variance should again return to less than or equal to 1 degree.

^ If the CMP variance remains more than 1 degree for more than 3 seconds, continue with the Circuit/System Testing.

Circuit/System Testing

1. Ignition OFF, inspect the crankshaft balancer bolt for the proper torque.

^ If the crankshaft balancer bolt is not at the proper torque, refer to Crankshaft Balancer Replacement.

2. Remove the CMP actuator solenoid.
3. Connect a jumper wire between the CMP actuator low reference circuit at the solenoid and a good ground. Connect a fused jumper wire to the CMP actuator high control circuit at the solenoid. Momentarily touch the fused jumper to B+. 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 correct valve timing.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Camshaft Position Actuator Solenoid Valve Replacement
* Camshaft Position Exhaust Actuator Replacement
* Camshaft Position Intake Actuator Replacement