Posts Tagged: P0538 Ford F350

P0538 Ford F350

P0538 Ford F350 Diagnose and fix A P0538 Ford F350 refers to a Fan Speed Sensor Circuit No Signal issue. This engine uses an electrically controlled viscous clutch fan to move air across the radiator. The powertrain control module (PCM) uses the fan speed sensor (FSS) input to monitor the cooling fan clutch speed. If the indicated fan speed is lower than the calibrated value during the key ON engine running (KOER) self-test, the diagnostic trouble code (DTC) is set. Ford trouble code diagnostics shows these possible causes: FSS VPWR … Read More