B2429
A/C Post Heater Sensor #2 Circuit Short to Ground
B2429 is an OBD-II diagnostic trouble code meaning: A/C Post Heater Sensor #2 Circuit Short to Ground. Common causes: wiring harness damage, post-heater sensor malfunction. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of the climate control system
- No air heating after turning on the air conditioner
- Check Engine light comes on
Causes
- Wiring harness damage
- Post-heater sensor malfunction
- Short circuit in the electrical circuit
- Sensor connection problems
How to Fix
- Check the integrity of the wiring harness
- Check the resistance of the post-heater sensor
- Inspect electrical connections for corrosion or damage
- Replace sensor if necessary
- Clear error memory and check if error is returned
Related codes
FAQ
What does the B2429 code mean?
B2429 is an OBD-II diagnostic trouble code that indicates: A/C Post Heater Sensor #2 Circuit Short to Ground
What causes a B2429 error code?
The most common causes of B2429 include: Wiring harness damage; Post-heater sensor malfunction; Short circuit in the electrical circuit; Sensor connection problems.
How do I fix a B2429 diagnostic trouble code?
To fix B2429: Check the integrity of the wiring harness. Check the resistance of the post-heater sensor. Inspect electrical connections for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2429?
Limited driving only, diagnose soon
How much does it cost to fix B2429?
The estimated repair cost for B2429 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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