P0016

DTC P0016

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 DESCRIPTOR

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

CIRCUIT/SYSTEM DESCRIPTION
The engine control module (ECM) uses the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor pulses to monitor the correlation between the crankshaft and camshaft position. The crankshaft reluctor wheel consists of a 60-tooth pattern with 2 teeth missing for a reference gap. Each tooth is evenly spaced 6 degrees apart, except for the reference gap. The camshaft reluctor wheel has 4 teeth, 2 narrow and 2 wide. The 4 trailing edges of each tooth are evenly spaced 90 camshaft degrees apart. As the crankshaft rotates with the CMP actuator in the home or parked position, the ECM expects CMP sensor pulses to occur 36 crankshaft degrees before top dead center (BTDC) at cylinder number 1, and every 90 camshaft degrees thereafter.

CONDITIONS FOR RUNNING THE DTC
- DTC P0335, P0336, P0340, P0341, P0641, or P0651 is not set.
- The engine is running.
- The engine speed is less than 1,200 RPM and the CMP Actuator is commanded to the home or parked position.
- The DTC runs continuously when the above conditions are met.

CONDITIONS FOR SETTING THE DTC
The ECM detects that the CMP sensor pulses occur less than or more than 9 crankshaft degrees outside of the normal position for 25 out of 35 engine cycles.

ACTION TAKEN WHEN THE DTC SETS
DTC P0016 are Type B DTCs.
The CMP actuator is commanded to the home or parked position.

CONDITIONS FOR CLEARING THE MIL/DTC
DTC P0016 are Type B DTCs.

CIRCUIT/SYSTEM VERIFICATION
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
3. Allow the engine to idle.
4. Observe the DTC information with a scan tool.
- If the scan tool indicates P0016 has failed this ignition cycle, continue with the Circuit/System Testing.
- If the vehicle passes the Circuit/System Verification Test, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

CIRCUIT/SYSTEM TESTING
1. With the ignition OFF, inspect the engine or review the service history of the vehicle for any recent repairs involving the timing chain, camshaft, or crankshaft.
- If recent repairs were made, refer to Timing Chain and Sprockets Replacement and inspect the timing chain and sprockets for proper alignment.
2. Remove the engine front cover, refer to Engine Front Cover Replacement and inspect the timing chain, tensioner, and sprockets for wear or damage
- If any parts are worn or damaged, replace as necessary.
- If everything else tests normal, replace the CMP actuator.

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