P04FF

Catalyst Heater Circuit Performance Bank 2

Severity

⚠️ Medium

Can 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

P0420 P0430 P04FE