What does code P26FB mean?

Q: What does code P26FB mean?

EGR Cooler Bypass Control Stuck Closed Bank 1. P26FB indicates that the engine control module has detected a fault in the exhaust gas recirculation cooler bypass valve circuit, specifically that the valve is stuck in the closed position on bank 1. The computer commands the bypass valve to open or close to regulate exhaust flow through the EGR cooler, but the monitored position or circuit feedback does not match the commanded state, leading to this code.

DTC codes / P26xx · Computer and output circuits / P26FB

P26FBEGR Cooler Bypass Control Stuck Closed Bank 1

P26FB indicates that the engine control module has detected a fault in the exhaust gas recirculation cooler bypass valve circuit, specifically that the valve is stuck in the closed position on bank 1. The computer commands the bypass valve to open or close to regulate exhaust flow through the EGR cooler, but the monitored position or circuit feedback does not match the commanded state, leading to this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

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