P04FE

Catalyst Heater Circuit Performance Bank 1

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Increased level of harmful emissions
Possible problems with passing technical inspection

Causes

Open or short circuit in heater wiring harness
Heater relay malfunction
Blown fuse
Malfunction of the catalyst heating element
Problems with the engine control unit (ECU)

How to Fix

Check heater circuit fuse
Check heater relay
Check the integrity of the wiring harness
Check the resistance of the heating element
If necessary, replace the heating element or wiring harness

Related codes

P0420 P0430 P04FF