P0338 CRANKSHAFT POSITION (CKP) SENSOR VOLTAGE TOO HIGH

When Monitored and Set Condition:

When Monitored: With the key on.
Set Condition: Voltage detected at the CKP is above a calibrated value for a calibrated amount of time.

POSSIBLE CAUSES

• (K6) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
• INTERMITTENT CONDITION
• ECM

DIAGNOSTIC PROCEDURE

1. Turn the ignition off. Disconnect the ECM harness connector(s). Disconnect the CKP sensor harness connector. Check connectors - Clean/repair as necessary. Measure voltage between the (K6) 5-volt supply circuit in the sensor harness connector and battery negative. Is the voltage greater than 1 volt?
   Yes --> Repair or replace the shorted wiring harness. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
   No --> Go To 2
2. Reconnect the ECM harness connectors. Ignition on, engine not running. Connect a jumper wire between the sensor (K6) 5-volt supply circuit and the sensor (K167) return in the sensor harness connector. Did DTC P0337 set?
   Yes --> Refer to the SYMPTOM: INTERMITTENT CONDITION Symptom (Diagnostic Procedure). Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
   No --> Replace the ECM. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).