P0344-CAMSHAFT POSITION SENSOR INTERMITTENT — BANK 1 SENSOR 1

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the engine cranking or running. Engine speed above 50 rpm. No Sensor Supply DTC's present.
Set Condition:
The Engine Control Module (ECM) does not receive a signal from the Camshaft Position Sensor when the Crankshaft Position Sensor indicates engine rpm.

Possible Causes

(K844) CMP 5-VOLT SUPPLY CIRCUIT OPEN

(K44) CAMSHAFT POSITION SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

CHECKING (K844) CMP 5-VOLT SUPPLY CIRCUIT

DAMAGED CMP SENSOR OR CAMSHAFT

ECM

(K944) CMP SENSOR GROUND CIRCUIT OPEN

INTERMITTENT CONDITION

(K44) CMP SENSOR SIGNAL CIRCUIT OPEN

(K844) CMP 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

(K44) CMP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

CAMSHAFT POSITION SENSOR

(K844) CMP 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K944) CMP SENSOR GROUND CIRCUIT

(K44) CMP SENSOR SIGNAL CIRCUIT SHORTED TO THE (K944) CMP SENSOR GROUND CIRCUIT

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Diagnostic Test

1.VERIFY ACTIVE DTC

NOTE: If DTC P0642 or P0643 is present with this DTC, diagnose DTCs P0642 or P0643 before diagnosing this DTC.

NOTE: The Timing Belt/Chain must be correctly installed and operational before diagnosis can be made. Refer to the Service Information to ensure the timing belt is properly installed.

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

Does the scan tool display this DTC?

Yes

Go To 3

Go To 2

2.TEST DRIVE

Does the scan tool display this DTC?

Yes

Go To 3

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

3.CHECKING (K44) CAMSHAFT POSITION SENSOR SIGNAL CIRCUIT

Select the appropriate voltage reading.

Voltage is above 5.4 volts.

Go To 4

Voltage is between 4.7 and 5.4 volts.

Go To 5

Voltage is below 4.7 volts.

Go To 12

4.(K44) CAMSHAFT POSITION SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE

Is the voltage below 1.0 volt?

Yes

Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Repair the (K44) Camshaft Position Sensor Signal circuit for a short to voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

5.CHECKING (K844) CAMSHAFT POSITION SENSOR 5-VOLT SUPPLY CIRCUIT

Select the appropriate voltage reading.

Voltage is above 5.4 volts.

Repair the (K844) CMP 5-Volt Supply circuit for a short to voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Voltage is between 4.7 and 5.4 volts.

Go To 6

Voltage is below 4.7 volts.

Go To 9

6.(K944) CAMSHAFT POSITION SENSOR GROUND CIRCUIT OPEN

Is the voltage below 0.5 volt?

Yes

Go To 8

Go To 7

7.(K944) CAMSHAFT POSITION SENSOR GROUND CIRCUIT OPEN

Is the resistance below 10.0 ohms?

Yes

Replace and program the ECM in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Repair the (K944) CMP Sensor Ground circuit for an open.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

8.DAMAGED CAMSHAFT POSITION SENSOR OR CAMSHAFT

Is there any evidence of these conditions?

Yes

Repair as necessary.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Replace the Camshaft Position Sensor in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

9.(K844) CAMSHAFT POSITION SENSOR 5-VOLT SUPPLY CIRCUIT OPEN

Is the resistance below 10.0 ohms?

Yes

Go To 10

Repair the (K844) CMP 5-Volt Supply circuit for an open.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

10.(K844) CAMSHAFT POSITION SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Is the resistance above 1000 ohms?

Yes

Go To 11

Repair the (K844) CMP Sensor 5-Volt Supply circuit for a short to ground.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

11.(K844) CAMSHAFT POSITION SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K944) CAMSHAFT POSITION SENSOR GROUND CIRCUIT

Is the resistance above 1000 ohms?

Yes

Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Repair the (K844) CMP Sensor 5-Volt Supply Circuit and (K944) CMP Sensor Ground circuits for a short together.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

12.(K44) CAMSHAFT POSITION SENSOR SIGNAL CIRCUIT OPEN

Is the resistance below 10.0 ohms?

Yes

Go To 13

Repair the (K44) CMP Sensor Signal circuit for an open
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

13.(K44) CAMSHAFT POSITION SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

Is the resistance above 1000 ohms?

Yes

Go To 14

Repair the (K44) CMP Sensor Signal circuit for a short to ground.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

14.(K44) CAMSHAFT POSITION SENSOR SIGNAL CIRCUIT SHORTED TO THE (K944) CAMSHAFT POSITION SENSOR GROUND CIRCUIT

Is the resistance above 1000 ohms?

Yes

Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Repair the (K44) CMP Sensor Signal circuit and the (K944) CMP Sensor Ground circuit for a short together.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)