What does code P26EF mean?

Q: What does code P26EF mean?

Engine Sound Control B Circuit Performance. P26EF indicates that the engine control module (ECM) has detected a performance fault in the 'B' circuit of the engine sound control system, which is typically an active noise cancellation or engine harmonic enhancement feature. The ECM monitors the circuit for expected electrical behavior and sets this code when the signal is out of range, intermittent, or fails to respond as commanded.

DTC codes / P26xx · Computer and output circuits / P26EF

P26EFEngine Sound Control B Circuit Performance

P26EF indicates that the engine control module (ECM) has detected a performance fault in the 'B' circuit of the engine sound control system, which is typically an active noise cancellation or engine harmonic enhancement feature. The ECM monitors the circuit for expected electrical behavior and sets this code when the signal is out of range, intermittent, or fails to respond as commanded.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

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.