P0017

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 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 more 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).
* DTC P0016 and P0017 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 more than 12 degrees advanced in relationship to the crankshaft.
- A camshaft is more 12 degrees retarded in relationship to the crankshaft.

* The condition exists for more than 4 seconds or a cumulative of 50 seconds.

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.

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 parameter value with a scan tool. The engine oil pressure must be at or above the minimum hot oil pressure values. Refer to Engine Mechanical Specifications.

• 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 after completing the diagnostic procedure. Verification Tests

* Camshaft Position Sensor Replacement - Exhaust
* Camshaft Position Sensor Replacement - Intake
* Crankshaft Position Sensor Replacement
* Timing Chain, Sprockets, and/or Tensioner Replacement