P1391 JEEP Wheel Speed Sensor 1, G-Sensor Circuit Performance

P1391 JEEP Wheel Speed Sensor 1, G-Sensor Circuit Performance

Possible causes
– Timing belt or chain stretched or jumped
– Faulty Camshaft Position (CMP) Sensor
– Camshaft Position (CMP) Sensor harness is open or shorted
– Camshaft Position (CMP) Sensor circuit poor electrical connection.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1391 JEEP Description

The ECM detected the actual Camshaft Position Sensor (CMP) position disagreed with the expected CMP level.

JEEP Vehicle:JEEP Commander,JEEP Compass,JEEP Grand Cherokee,JEEP Liberty,JEEP Patriot,JEEP Wrangler,JEEP Wrangler Unlimited,

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