P0016
DTC P0016 or P0017
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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 camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshafts while the engine is operating. The CMP actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the CMP actuator solenoid duty cycle by controlling the amount of solenoid ON time. The CMP actuator solenoid controls the advance or the retard of each camshaft. The CMP actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.
Ignition voltage is supplied directly to the CMP actuator solenoid. The ECM controls the solenoid by grounding the control circuit with a solid state device called a driver. The ECM compares the camshaft position or the camshaft angle, to the position of the crankshaft.
Conditions for Running the DTC
* Before the ECM can report DTC P0016 or P0017 failed, DTCs P0010, P0011, P0013, P0014, P0335, P0336, P0338, P0341, P0342, P0343, P0366, P0367, P0368, P2088, P2089, P2090, and P2091 must run and pass.
* The engine is operating for greater than 50 seconds.
* The engine coolant temperature is between 0-95°C (32-203°F).
* The calculated engine oil temperature is less than 120°C (248°F).
* The DTCs run continuously once the above conditions are met for approximately 10 minutes.
Conditions for Setting the DTC
* The ECM detects one of the following conditions:
- The ECM detects a deviation in the relationship between a camshaft and the crankshaft.
- A camshaft is greater than 9.9 degrees advanced in relationship to the crankshaft.
- A camshaft is greater than 9.9 degrees retarded in relationship to the crankshaft.
* The DTCs are set when the above conditions are met for greater than 4 seconds or a cumulative of 50 seconds.
* The ECM detects the difference between an actual intake camshaft angle and the locked position angle is greater than 15 degrees.
* The ECM detects the difference between an actual exhaust camshaft angle and the locked position angle is greater than 21 degrees.
Action Taken When the DTC Sets
DTCs P0016 and P0017 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0016 and P0017 are Type B DTCs.
Diagnostic Aids
* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, camshaft sensor, crankshaft sensor, or timing chain can cause this DTC to set.
* An actuator that is in the full advance or retard position can cause this DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
3. Allow the engine to idle.
4. With a scan tool, monitor the Desired CMP, CMP Angle, and the CMP Variance parameters. All 3 parameters should display less than 1 degree.
5. Using the scan tool output control function, command the CMP actuator to 25 degrees. The Desired CMP and the CMP Angle parameter should display 25 degrees. The CMP Variance Angle will rise for 2-3 seconds until the Desired and Actual parameters values match, then the CMP Variance parameter should return to zero degrees.
• If the vehicle passes the Circuit/System Verification Test, then 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
Important: 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. Monitor the Engine Oil Pressure Switch parameter value with a scan tool. The Engine Oil Pressure Switch parameter should display OK.
• If the engine oil pressure is low, correct the cause of the low oil pressure condition first.
2. Idle the engine at normal operating temperature for 10 minutes. DTCs P0016 or P0017 should not set.
• If a DTC sets, inspect for the following:
* Incorrect installation of the camshaft sensors
* Incorrect installation of the crankshaft sensor
* A timing chain tensioner condition
* An incorrectly installed timing chain
* Excessive play in the timing chain
* A timing chain that jumped teeth
* A crankshaft reluctor wheel that has moved in relationship to top dead center (TDC) on the crankshaft
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Camshaft Position Sensor Replacement - Exhaust (Service and Repair)
* Camshaft Position Sensor Replacement - Intake (Service and Repair)
* Crankshaft Position Sensor Replacement (Service and Repair)
* Camshaft Timing Chain, Sprocket, and Tensioner Replacement (Service and Repair)