P0016

DTC P0016

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of diagnostic approach.
* Diagnostic Procedure Instructions (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 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.

Diagnostic Aids

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

Reference Information
Schematic Reference

Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

* Camshaft Actuator System Description (Camshaft Actuator System)
* Electronic Ignition System Description (Electronic Ignition System Description)

Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition ON, observe the DTC information with a scan tool. Verify that DTCs P0010, P0011, P0335, P0336, P0340, or P0341 are not set.

• If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.

2. Idle the engine at normal operating temperature. DTCs P0016 should not set.

• If a DTC sets, inspect for the following and repair as necessary:

* The correct installation of the camshaft sensor
* The correct 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 camshaft position actuator filter for being restricted or plugged
* A mechanical cam actuator that is stuck

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Repair Instructions

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

* Camshaft Position Actuator Cleaning and Inspection (50. Camshaft Position Actuator Cleaning and Inspection)
* Camshaft Timing Chain and Sprocket Cleaning and Inspection (48. Camshaft Timing Chain and Sprocket Cleaning and Inspection)
* Camshaft Timing Chain and Sprocket Replacement (Service and Repair) for timing chain, sprockets, CMP actuator filter screen, and CMP actuator replacement