Engine-Codes - Generic - B129A

B129A Code - LIN Bus D Signal Invalid

- Code Popularity: 2,063 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the B129A Code?

  • 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 to Fix the B129A Code?

Start by checking 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.

|B129A code tech notes

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

|What is the cost to diagnose the B129A code?

Labor: 1.0

The cost to diagnose the B129A code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B129A code possible symptoms?

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

|What Does the B129A Code Mean?

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.

LIN Bus D Signal Invalid

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