DTC Advanced Diagnostics: P0339
DTC P0339:Crankshaft Position (CKP) Sensor Circuit Intermittent Interruption

General Description

The crankshaft position (CKP) sensor detects injection/ignition timing for each cylinder and engine speed. The CKP sensor consists of a rotor and a semiconductor that detects rotor position. When the engine starts, the rotor turns and the magnetic flux in the semiconductor device changes. The changes of magnetic flux are converted into pulsing signals to the powertrain control module (PCM). If abnormal amount of pulsing signals from the CKP sensor are detected, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
–
DTC Type
One drive cycle, MIL on

Enable Conditions
Condition
Minimum
Maximum
Engine speed
[ENGINE SPEED]
400 min-1 (rpm)
–
[ ]: HDS Parameter

Malfunction Threshold
Other than 58 pulses are detected during intervals between reference pulses for each crank revolution. This condition has been detected at least 30 times.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
CKP sensor CRKP line electrical noise overlapped
CKP sensor rotor chipped
CKP sensor failure
PCM internal circuit failure

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.