DTC codes / P26xx · Computer and output circuits / P26C5
P26C5 indicates that the powertrain control module (PCM) has detected an open circuit or control fault in the electrical path for Exhaust Flow Control Valve A, which is used to manage exhaust gas flow for purposes such as noise reduction or thermal management. The PCM commands the valve to a position and monitors the circuit for expected voltage or current feedback; when the feedback falls outside the expected range, the code is stored.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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