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) - Intake Camshaft Position (CMP) Correlation

### Circuit/System Description

The engine control module (ECM) uses the crankshaft position (CKP) sensor and the intake camshaft position (CMP) sensor information to monitor the correlation between the crankshaft and intake camshaft position.

### Conditions for Running the DTC

• | DTCs P0335, P0336, P0340, P0341, P0365, P0366, P0641, and P0651 are not set.

• | The engine is cranking or running.

• | The engine speed is less than 1,200 RPM and the CMP actuator is commanded to the home or parked position.

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

### Conditions for Setting the DTC

The ECM detects that the intake CMP sensor pulses occur less than 9 or more than 12 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.

### 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, crankshaft, or timing chain can cause this DTC to set.

### Reference Information

#### Schematic Reference

Engine Controls Schematics

#### Connector End View Reference

• | Engine Controls Connector End Views

• | Engine Control Module Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

• | Scan Tool Data List

• | Scan Tool Data Definitions

### Circuit/System Verification

1. Operate the vehicle at idle and at various engine speeds and load ranges while observing the Int. CMP Variance, Desired Int. CMP, and Int. CMP Angle parameters with a scan tool.
2. The Int. CMP Variance should remain less than or equal to 1 degree unless the intake CMP actuator is being commanded. If the intake CMP actuator is commanded, the Int. CMP Variance will rise for 1-2 seconds until the Int. CMP Angle parameter matches the Desired Int. CMP parameter. The Int. CMP Variance should again return to less than or equal to 1 degree.

⇒ | If the Int. CMP Variance remains more than 1 degree for more than 3 seconds, continue with the Circuit/System Testing.

### Circuit/System Testing

1. Ignition OFF, inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications .

⇒ | If the crankshaft balancer bolt is not at the proper torque, refer to Crankshaft Balancer Replacement .

2. Remove the intake CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement .
3. Connect a fused jumper wire between the control circuit of the CMP actuator solenoid and battery voltage. Connect a jumper wire between the low reference circuit of the CMP actuator solenoid and a good ground. The pintle of the solenoid should move.

⇒ | If the pintle inside the CMP actuator solenoid does not move, replace the CMP actuator solenoid.

4. Inspect the intake CMP actuator for binding or being stuck.
5. Inspect the engine for correct valve timing. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement .

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Camshaft Position Intake Actuator Replacement

• | Camshaft Position Actuator Solenoid Valve Replacement