What does code P2490 mean?

Q: What does code P2490 mean?

EGR Cooler Bypass Control Circuit Low Bank 2. P2490 means the powertrain control module (PCM) has detected an abnormally low voltage on the control circuit for the bank 2 exhaust gas recirculation (EGR) cooler bypass valve. The PCM commands the valve to open or close to manage exhaust flow through the cooler, and a low voltage on the control wire indicates a short to ground, an open circuit, or a faulty valve actuator.

DTC codes / P24xx · Auxiliary emission controls / P2490

P2490EGR Cooler Bypass Control Circuit Low Bank 2

P2490 means the powertrain control module (PCM) has detected an abnormally low voltage on the control circuit for the bank 2 exhaust gas recirculation (EGR) cooler bypass valve. The PCM commands the valve to open or close to manage exhaust flow through the cooler, and a low voltage on the control wire indicates a short to ground, an open circuit, or a faulty valve actuator.

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.