DTC codes / P26xx · Computer and output circuits / P26E3
P26E3 indicates that the powertrain control module has detected a high-voltage condition on the control circuit for the fuel mode indicator lamp, which is the dash light that shows when the vehicle is operating in a particular fuel mode such as economy or alternative fuel. The circuit is monitored for expected voltage, and a reading above the normal threshold triggers this code, usually because the control wire is shorted to voltage or the lamp driver inside a module has failed.
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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