P0429
Catalyst Heater Control Circuit/Open Bank 1
P0429 is an OBD-II diagnostic trouble code meaning: Catalyst Heater Control Circuit/Open Bank 1. Common causes: open heating control circuit, faulty heating relay. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Possible increase in fuel consumption
- Deterioration of environmental indicators
Causes
- Open heating control circuit
- Faulty heating relay
- Blown fuse
- Heating element malfunction
- Wiring Harness Problems
- ECU malfunction
How to Fix
- Check the heating circuit fuse
- Check heating relay
- Check the integrity of the wiring harness
- Check the resistance of the heating element
- If necessary, replace the heating element
- Check the operation of the computer
Related codes
Error P0429 by Vehicle Brand
FAQ
What does the P0429 code mean?
P0429 is an OBD-II diagnostic trouble code that indicates: Catalyst Heater Control Circuit/Open Bank 1
What causes a P0429 error code?
The most common causes of P0429 include: Open heating control circuit; Faulty heating relay; Blown fuse; Heating element malfunction.
How do I fix a P0429 diagnostic trouble code?
To fix P0429: Check the heating circuit fuse. Check heating relay. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0429?
Limited driving only, diagnose soon
How much does it cost to fix P0429?
The estimated repair cost for P0429 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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