| All About OBDII Engine Codes
AutoCodes - Generic - B1491

B1491 Code - Ignition Cylinder Sensor Circuit Failure

- Code Popularity: 7,319 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By - Updated Apr 14, 2019
Share on Facebook   Share on Twitter   Share on Linkedin

|Code 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)

|How do I Fix the Code B1491?

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 connector's pins.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code B1491?

Labor: 1.0

The cost of diagnosing the B1491 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code B1491 Possible Symptoms?

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

|Code 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 -
B1491 Code - Ignition Cylinder Sensor Circuit Failure

|Need More Information on the B1491 Code?

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

|Need Help with the B1491 Code?

Get the B1491 code diagnosed by a professional: Find a repair shop in your area

|Code B1491 comments

Help us improve Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B1491 code? Have you replaced any parts?
Any information is appreciated. Thanks