What does code P04FF mean?

Q: What does code P04FF mean?

Catalyst Heater Circuit Performance Bank 2. P04FF indicates that the powertrain control module has detected a performance fault in the heater circuit for the bank 2 catalytic converter, which is the converter on the side of the engine that does not contain cylinder number one. The computer monitors the heater element's electrical current and response time during cold starts, and it sets this code when the heater does not warm the catalyst as quickly or as effectively as the stored model expects.

DTC codes / P04xx · Auxiliary emission controls / P04FF

P04FFCatalyst Heater Circuit Performance Bank 2

P04FF indicates that the powertrain control module has detected a performance fault in the heater circuit for the bank 2 catalytic converter, which is the converter on the side of the engine that does not contain cylinder number one. The computer monitors the heater element's electrical current and response time during cold starts, and it sets this code when the heater does not warm the catalyst as quickly or as effectively as the stored model expects.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.