Diagnostic Instructions

DTC Descriptors

DTC P0340: Intake Camshaft Position (CMP) Sensor Circuit

DTC P0342: Intake Camshaft Position (CMP) Sensor Circuit Low Voltage

DTC P0343: Intake Camshaft Position (CMP) Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit	Short to Ground	High Resistance	Open	Short to Voltage	Signal Performance
5-Volt Reference	P0340, P0342, P0367	P0340	P0340, P0343	--	P0340
CMP Sensor Signal High	P0340, P0342	P0340, P0343	P0340, P0343	P0340, P0343	P0340
CMP Sensor Signal Low	--	P0340, P0343	P0340, P0343	--	P0340

Circuit/System Description

The camshaft position (CMP) sensor is a magnetic resistance element (MRE) design with a 5-volt reference, a signal high and signal low circuit. When the signal rotor on the intake camshaft rotates past the CMP sensor, the electrical resistance of the sensor's magnetic field changes and the output voltage to the control module switches between high and low.

Conditions for Running the DTC

P0340

P0342 and P0343

Conditions for Setting the DTC

P0340

P0342

The intake CMP sensor signal voltage is less than 0.3 volts for greater than 4 seconds.

P0343

The intake CMP sensor signal voltage is greater than 4.7 volts for greater than 4 seconds.

Action Taken When the DTC Sets

DTCs P0340, P0342, and P0343 are Type A DTCs.

Conditions for Clearing the DTC

DTCs P0340, P0342, and P0343 are Type A DTCs.

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

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Important: If you were sent here from Engine Cranks but Does Not Run, proceed to Circuit/System Testing.

1. Attempt to start the engine, observe the DTC information with a scan tool. DTCs P0340, P0342, and P0343 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 intake CMP sensor.
2. Ignition OFF, test for less than 10 ohms between the CMP sensor signal low circuit terminal 2 and ground G104.

⇒	If greater than the specified range, test the signal low circuit for an open/high resistance. If the circuit tests normal, replace the PCM.

3. Ignition ON, test for 4.8-5.2 volts on the CMP sensor 5-volt reference circuit terminal 3.

⇒	If less than the specified range, test the 5 volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the PCM.

⇒	If greater than the specified range, test the 5 volt reference circuit for a short to voltage. If the circuit tests normal, replace the PCM.

4. Test for 4.8-5.2 volts on the CMP sensor signal high circuit terminal 1.

⇒	If less than the specified range, test the signal high circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the PCM.

⇒	If greater than the specified range, test the signal high circuit for a short to voltage. If the circuit tests normal, replace the PCM.

5. Install a 3 A fused jumper wire to the signal high circuit terminal 1.

Note: The engine may stall during this procedure.

6. Engine idling, touch the end of the fused jumper wire to ground. Verify that DTC P0342 sets.

⇒	If DTC P0342 does not set, replace the PCM.

7. Remove the CMP sensor. Inspect the camshaft for a damaged CMP sensor reluctor wheel.

⇒	If a condition is found, repair as necessary.

8. If all circuits test normal, replace the CMP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.