Diagnostic Instructions
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 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 is a Type B DTC. |
| • | The CMP actuator is commanded to the home or parked position. |
Conditions for Clearing the MIL/DTC
DTC P0016 is a Type B DTC.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Important: The supply of clean pressurized engine oil to the CMP actuator is essential to CMP actuator performance.
- Observe the engine oil level. The engine oil level should be within operating range. Refer to
Approximate Fluid Capacities.
- Ensure that the vehicle has the correct engine oil and is not old, burnt or contains additives. Refer to Checking Things Under the Hood in Service and Appearance Care within the Owner's Manual.
| ⇒ | If the vehicle has the incorrect engine oil, is old, burnt, or contains additives, change the oil and filter. |
- Test the engine oil pressure for correct operation. Refer to
Oil Pressure Diagnosis and Testing.
- Allow the engine to reach operating temperature.
- Set the parking brake and place the vehicle in Park for automatic, or Neutral for manual.
- Observe the CMP variance parameter. 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 0 degrees.
Important: The engine will run rough and may require throttle input to keep running.
- Command the CMP actuator to 20 degrees. The Desired CMP parameter should match the CMP Angle parameter.
Circuit/System Testing
| • | Inspect the engine or review the service history of the vehicle for any recent repairs involving the timing chain, camshaft, or crankshaft. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Camshaft Timing Chain and Sprocket Replacement for timing chain, sprockets, CMP actuator filter screen, and CMP actuator replacement
