P1391 Lincoln 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.
– 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 Lincoln Description
The ECM detected the actual Camshaft Position Sensor (CMP) position disagreed with the expected CMP level.
Lincoln Vehicle:Lincoln Mark LT,Lincoln MKS,Lincoln MKX,Lincoln MKZ,Lincoln Navigator,Lincoln Navigator L,Lincoln Town Car,Lincoln Zephyr,