P0429

Catalyst Heater Control Circuit/Open Bank 1

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

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

P0430 P0420 P0135