B1491 - Ignition Cylinder Sensor Circuit Failure

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Ignition Cylinder Sensor
  • Ignition Cylinder Sensor harness is open or shorted
  • Ignition Cylinder Sensor circuit poor electrical connection
  • Faulty Body Control Module (BCM)

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1491 Description

The Body Control Module (BCM) monitors the Ignition Cylinder Sensor. The BCM sets the OBDII code when the Ignition Cylinder Sensor is not to factory specifications.
OBDII Code B1491 - Ignition Cylinder Sensor Circuit Failure - AutoCodes.com

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B1491 Comments

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