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
-
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 -
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).
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