P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the engine cranking or running.
Set Condition:
The PCM detects that CKP Sensor failure counter has reached 20. One Trip Fault. Three good trips to turn off the MIL.

Possible Causes

CRANKSHAFT POSITION SENSOR CIRCUIT WIRING OR CONNECTORS

CRANKSHAFT POSITION SENSOR

CRANKSHAFT, TONE WHEEL OR FLEX PLATE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Diagnostic Test

1.DTC IS ACTIVE

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

NOTE: If the DTC does not reset it may be necessary to test drive the vehicle.

Is the status Active for this DTC?

Yes

Go To 2

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

2.CRANKSHAFT POSITION SENSOR CIRCUIT WIRING OR CONNECTORS

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 3

3.CRANKSHAFT POSITION SENSOR IRREGULAR SIGNAL

Were any Crankshaft Position Sensor signals irregular or missing?

Yes

Go to 4

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

4.CRANKSHAFT, TONE WHEEL OR FLEX PLATE

Were any problems found?

Yes

Repair as necessary in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go To 5

5.CRANKSHAFT POSITION SENSOR

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Replace the Crankshaft Position Sensor.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).