B1491 - Ignition Cylinder Sensor Circuit Failure

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B1491 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)

First diagnose B1491 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the B1491 code

    Labor: 1.0

    The cost of diagnosing the B1491 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B1491 Possible Symptoms

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

B1491 Meaning

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 - Engine-Codes.com

B1491 More Information

Need more information on how to fix the B1491 code?
Get Access to Factory Service Manuals

Related Information