DTC codes / P26xx · Computer and output circuits / P26B6
P26B6 indicates that the powertrain control module has detected a fault in the control circuit for fuel shutoff valve B, specifically that the circuit is stuck in the energized or 'on' state when it should be off. The computer monitors the circuit and sets this code when the commanded state does not match the actual state, often due to a short to voltage or a failed valve.
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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