B129A - LIN Bus D Signal Invalid

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

B129A Possible Causes

  • Faulty Driver Side Windshield Wiper Motor
  • Driver Side Windshield Wiper Motor harness is open or shorted
  • Driver Side Windshield Wiper Motor circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How do I fix code B129A?

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.
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Tech Notes

B129A:86 LIN Bus D Signal Invalid
B129A:88 LIN Bus D Bus Off

Cost of diagnosing the B129A code

Labor: 1.0

The cost of diagnosing the B129A 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.

Possible Symptoms

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

B129A Description

The Body Control Module (BCM) monitors the Central Lock Switch Illumination Circuit. The BCM sets the OBDII code when the BCM receives invalid data from the Driver Side Windshield Wiper Motor over the LIN.
OBDII Code B129a - LIN Bus D Signal Invalid - AutoCodes.com

More Information

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