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

### Conditions for Running the DTC

• | DTCs P000A, P000B, P0010, P0013, P0014, P0335, P0336, P0340, P0341, P0365, P0366, P2088, P2089, P2090, or P2091 are not set.

• | The ignition is ON.

• | The engine is running.

• | The engine speed is between 672-4,000 RPM.

• | The battery voltage is between 10-16 volts.

• | The engine oil temperature is more than -10°C (+14°F).

• | The engine coolant temperature (ECT) is more than -9.8°C (+14.4°F).

• | These DTCs run continuously when the above conditions are met.

### Conditions for Setting the DTC

The ECM detects an incorrect CMP sensor signal for 2 seconds.

### Action Taken When the DTC Sets

DTCs P0016 and P0017 are Type B DTCs.

### Conditions for Clearing the MIL/DTC

DTCs P0016 and P0017 are Type B DTCs.

### Diagnostic Aids

A short to ground in a CMP actuator solenoid control circuit can cause this DTC to set.

### Reference Information

#### Schematic Reference

Engine Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

1. Engine running, observe the DTC information with a scan tool. DTCs P0016 and P0017 should not set.
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.

### Circuit/System Testing

Important: Incorrect oil viscosity, aftermarket engine oil additives, or engine oil that is overdue for changing can greatly affect the performance of the camshaft actuator.

1. Ignition OFF, inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications.
2. Remove the CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement.
3. Connect a fused jumper wire between the CMP actuator voltage supply circuit at the solenoid and B+. Connect a jumper wire to the CMP actuator control circuit at the solenoid. Momentarily touch the jumper wire to ground. Observe the spool valve inside the CMP actuator. The spool valve should move from fully closed to fully opened position.

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

4. Inspect the CMP actuator for binding or being stuck.
5. Inspect the engine for the following conditions:

• | An incorrectly installed camshaft sensor

• | An incorrectly installed crankshaft sensor

• | An incorrectly installed camshaft actuator

• | Incorrect valve timing

• | A loose camshaft reluctor wheel

• | A loose crankshaft reluctor wheel

• | Excessive crankshaft end play

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Camshaft Position Actuator Solenoid Valve Replacement

• | Camshaft Position Exhaust Actuator Replacement

• | Camshaft Position Intake Actuator Replacement

• | Camshaft Position Sensor Replacement

• | Camshaft Replacement

• | Crankshaft Balancer Installation

• | Crankshaft Balancer Removal

• | Crankshaft Position Sensor Replacement

• | Crankshaft Replacement

• | Timing Belt Replacement