Drivers first notice the checkβengine illumination accompanied by subtle drivability changes. The engine may feel βrichβ β higher fuel consumption and a slight loss of power β and the idle can become uneven or stall when the vehicle is stopped. In some cases the vehicle hesitates during acceleration as the ECU lacks accurate fuelβtemperature data to calculate proper fuel delivery. These signs appear quickly after the code is set because the fuelβtemperature sensor provides realβtime input that the engine control module (ECU) relies on for precise fuelβmetering.
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Service Recommendation: Most issues related to this fault are diagnosed and corrected through inspection, wiring repair, and calibration rather than module replacement. For modules not typically replaced through aftermarket suppliers, diagnosis and repair should be performed by a certified automotive technician with access to factory service information and tooling.