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 the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptor
DTC P0016
- Crankshaft Position - Camshaft Position Not Plausible

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 the camshaft position. The CKP sensor works in conjunction with a 58X reluctor wheel that is attached to the crankshaft. Each tooth on the reluctor wheel is spaced 6 degrees apart with one span having a 12 degree space. The ECM uses the 12 degree space to determine top dead center (TDC) for cylinders 1 and 6. The camshaft reluctor wheel has 4 teeth, 2 narrow, and 2 wide. The 4 trailing edges of each tooth are evenly spaced at 90 degrees apart around the circumference of the camshaft sprocket. With the engine running, and the CMP actuator in the parked position - if equipped, the ECM expects the camshaft signal pulses to occur 36 crankshaft degrees before top dead center (BTDC) for cylinder number 1, and every 90 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.
* The crankshaft and camshaft position signals are synchronized.
* The camshaft position actuator is commanded to the parked position - If equipped.
* DTC P0016 runs continuously when the above conditions are met.

Conditions for Setting the DTC

The ECM detects the camshaft to crankshaft misalignment by monitoring the camshaft position sensor pulses. The ECM detects one of the following conditions:

* The ECM detects that the CMP sensor pulses occur greater than 11 degrees before or after the nominal position for 4 out of 5 camshaft revolutions while the starter is engaged.
* The ECM detects that the CMP sensor pulses occur greater than 11 degrees before or after the nominal position for 24 out of 30 camshaft revolutions while the engine is operating.

Action Taken When the DTC Sets

DTC P0016 is a Type B DTC.

Conditions for Clearing the DTC

DTC P0016 is a Type B DTC.

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. Idle the engine at normal operating temperature. Observe the DTC information with a scan tool. DTC P0016 should not set.

• If a DTC sets, inspect for the following conditions:

* 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 or sprockets
* A timing chain that jumped teeth

• If you find a condition, repair as necessary.

2. 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 Timing Chain and Sprocket Cleaning and Inspection (48. Camshaft Timing Chain and Sprocket Cleaning and Inspection)
* Camshaft Timing Chain and Sprocket Replacement (LS3) (Camshaft Timing Chain and Sprocket Replacement) - Without Cam Actuator
* Timing Chain, Crankshaft Sprocket, Camshaft Position Actuator, and Solenoid Valve Replacement (L99) (Timing Chain, Crankshaft Sprocket, Camshaft Position Actuator, and Solenoid Valve Replacement) - With Cam Actuator