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DTC codes / P26xx · Computer and output circuits / P26F3

P26F3Starter Relay B Stuck Off

P26F3 indicates that the powertrain control module (PCM) has commanded the starter relay B circuit on, but the circuit feedback indicates the relay contacts remain open, so the engine will not crank. The PCM detects a mismatch between the requested relay state and the actual electrical state of the relay control circuit.

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.

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