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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