What does code P24C3 mean?

DTC codes / P24xx · Auxiliary emission controls / P24C3

P24C3Exhaust Gas Temperature Measurement System Multiple Sensor Correlation Bank 2

P24C3 indicates that the engine control module (ECM) has detected an implausible relationship among the exhaust gas temperature (EGT) sensor readings on bank 2, meaning the sensors are not reporting temperatures that correlate with each other under the current operating conditions. The ECM compares the outputs of multiple EGT sensors on the same bank and sets this code when the expected pattern is violated, often due to a faulty sensor, wiring issue, or exhaust restriction.

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.