B129A
LIN Bus D Signal Invalid
B129A is an OBD-II diagnostic trouble code meaning: LIN Bus D Signal Invalid. Common causes: open or short circuit in lin d bus wiring, damage to connectors or corrosion of contacts. Estimated repair cost: $56–167.
Symptoms
- Inoperability of some electronic systems
- Check Engine Light Illuminates
- Unstable climate control operation
Causes
- Open or short circuit in LIN D bus wiring
- Damage to connectors or corrosion of contacts
- Fault in one of the modules connected to the LIN D bus
- Problems with power supply or grounding of modules
How to Fix
- Check the integrity of the LIN D bus wiring
- Inspect connectors and contacts for damage or corrosion
- Check power supply and grounding of connected modules
- Replace the faulty module if it is the problem
Related codes
FAQ
What does the B129A code mean?
B129A is an OBD-II diagnostic trouble code that indicates: LIN Bus D Signal Invalid
What causes a B129A error code?
The most common causes of B129A include: Open or short circuit in LIN D bus wiring; Damage to connectors or corrosion of contacts; Fault in one of the modules connected to the LIN D bus; Problems with power supply or grounding of modules.
How do I fix a B129A diagnostic trouble code?
To fix B129A: Check the integrity of the LIN D bus wiring. Inspect connectors and contacts for damage or corrosion. Check power supply and grounding of connected modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B129A?
Limited driving only, diagnose soon
How much does it cost to fix B129A?
The estimated repair cost for B129A is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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