What does code P2428 mean?

Q: What does code P2428 mean?

Exhaust Gas Temperature Too High (Bank 1). P2428 is a generic powertrain code indicating that the engine control module (ECM) has detected an exhaust gas temperature (EGT) on bank 1 that exceeds the calibrated safe limit. The ECM monitors one or more EGT sensors on the bank 1 exhaust stream and sets this code when the temperature remains above the threshold for a calibrated period, often under high load or regeneration conditions.

DTC codes / P24xx · Auxiliary emission controls / P2428

P2428Exhaust Gas Temperature Too High (Bank 1)

P2428 is a generic powertrain code indicating that the engine control module (ECM) has detected an exhaust gas temperature (EGT) on bank 1 that exceeds the calibrated safe limit. The ECM monitors one or more EGT sensors on the bank 1 exhaust stream and sets this code when the temperature remains above the threshold for a calibrated period, often under high load or regeneration conditions.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

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.