For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle

• | Review Strategy Based Diagnosis

• | Diagnostic Procedure Instructions

### DTC Descriptor

DTC P0016 00: Crankshaft Position - Camshaft Position Correlation
DTC P0340 00: Camshaft Position Sensor Circuit Malfunction
DTC P0344 00: Camshaft Position Sensor Performance

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
5-Volt Reference | P0651 00 | P0340 00 | P0651 00 | --
Signal | P0340 00 | P0340 00 | P0344 00 | P0344 00, P0016 00
Low Reference | -- | P0340 00 | P0340 00 | --

Component | Condition | DTCs
--- | --- | ---
Sensor - Camshaft |

• | Improper installation

• | Physical damage

• | Foreign material passing between the Sensor - Camshaft and the reluctor wheel

• | Looseness

• | Gap between the Sensor - Camshaft and the reluctor wheel is out of range

P0340 00, P0016 00

Reluctor Wheel |

• | Improper installation

• | Physical damage

• | Foreign material passing between the Sensor - Camshaft and the reluctor wheel

• | Looseness

P0340 00, P0016 00

### Circuit/System Description

The camshaft position sensor correlates the crankshaft to camshaft position so that the engine control module (ECM) can determine which cylinder is ready to be fueled by an injector. As the camshaft rotates, the reluctor wheel interrupts a magnetic field produced by a magnet within the sensor and sends a signal to the ECM through the signal circuit.

### Conditions for Running the DTC

#### P0016

• | DTC P0336 is not set.

• | The engine is running.

• | The engine speed is greater than 50 RPM.

• | The DTC run continuously once the above conditions are met.

#### P0340 and P0344

• | DTC P0016 is not set.

• | The engine is running.

• | The engine speed is greater than 50 RPM.

• | The DTCs run continuously once the above conditions are met.

### Conditions for Setting the DTC

#### P0016 00

The ECM detects an incorrect camshaft position sensor signal.

#### P0340 00

The ECM detects no camshaft position sensor signal.

#### P0344 00

The ECM detects too few camshaft position sensor pulses.

### Action Taken When the DTC Sets

DTCs P0016, P0340, and P0344 are Type B DTCs.

### Conditions for Clearing the DTC

DTCs P0016, P0340, and P0344 are Type B DTCs.

### Diagnostic Aids

The following conditions can also set the DTC:

• | Physical damage to the camshaft position sensor or the reluctor wheel

• | Gap between the camshaft position sensor and the reluctor wheel is out of range

• | Improper installation of the camshaft position sensor or the reluctor wheel

• | Foreign material passing between the camshaft position sensor and the reluctor wheel

### 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

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References

### Circuit/System Verification

1. Engine running, observe the DTC information with a scan tool. DTCs P0016, P0340, and P0344 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

1. Ignition OFF, disconnect the harness connector at the B23 Camshaft Position (CMP) Sensor.
2. Test for less than 5 Ω of resistance between the low reference circuit terminal 1 and ground.

⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit test normal, replace the K20 Engine Control Module (ECM).

3. Ignition ON, test for greater than 4.8 V between the 5-Volt reference circuit terminal 3 and ground.

⇒ | If less than the specified range, test the 5-Volt reference circuit for an open/high resistance. If the circuit test normal, replace the K20 Engine Control Module (ECM)

4. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 2 and ground.

⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

5. If all circuits test normal, test or replace the B23 Camshaft Position (CMP) Sensor.

### Repair Instructions

Perform the Diagnostic Repair Verification

• | Camshaft Position Sensor Replacement

• | Control Module References