P04FF
Catalyst Heater Circuit Performance Bank 2
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$111–333 (est.)
Symptoms
- Check Engine light comes on
- Deterioration of catalytic converter efficiency
- Increased level of harmful emissions
Causes
- Open or short circuit in the heater circuit
- Catalytic converter heater malfunction
- Problems with the heater circuit relay or fuse
- ECU malfunction
How to Fix
- Check the integrity of the heater circuit (wire harness, connectors)
- Check the resistance of the catalytic converter heater
- Check heater circuit relays and fuses
- Replace the catalytic converter heater if necessary.
Related codes
Error P04FF by Vehicle Brand
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