For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | 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 the camshaft position. The crankshaft reluctor wheel consists of a 60-tooth pattern with 2 teeth missing for the 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 at 90 degrees apart around the circumference of the camshaft sprocket. With the engine running, and the CMP actuator in the parked position, 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 2,000 RPM.

• | DTC P0016 runs continuously when the above conditions are met.

### Conditions for Setting the DTC

The ECM detects that the CMP sensor pulses occur more than 11 crank degrees before, or 11 crank degrees after, nominal position for 24 out of 30 engine cycles.

### 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

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Electronic Ignition (EI) System Description

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References 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. Observe the DTC information with a scan tool.

⇒ | If the scan tool indicates P0016 has failed this ignition cycle, continue with the Circuit/System Testing.

5. 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: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

1. Inspect the engine front cover area, or review the service history of the vehicle for any recent repairs involving the timing chain, timing chain tensioner, camshaft, crankshaft, camshaft actuator, or sprockets.

⇒ | If recent repairs were made, refer to Camshaft Timing Chain and Sprocket Replacement , and inspect the timing chain, timing chain tensioner, and both sprockets for proper timing alignment or indexing.

2. Remove the engine front cover, refer to Engine Front Cover Replacement and inspect the timing chain, timing chain tensioner, and sprockets for wear or damage. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection.

⇒ | If any components are worn or damage, replace as necessary.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Camshaft Timing Chain and Sprocket Replacement