P0538 Ford A/C Evaporator Temperature Circuit High Input
Possible causes
– Faulty A/C Evaporator Temperature Sensor
– A/C Evaporator Temperature Sensor harness is open or shorted
– A/C Evaporator Temperature Sensor circuit poor electrical connection
– A/C Evaporator Temperature Sensor harness is open or shorted
– A/C Evaporator Temperature Sensor circuit poor electrical connection
What about the obd code?
When the A/C Evaporator Temperature (ACET) sensor signal is high the Powertrain Control Module (PCM) will triggered the P0538 Ford code.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– A/C Inoperative
– A/C Blows Warm
– A/C Inoperative
– A/C Blows Warm
P0538 Ford Description
The Powertrain Control Module (PCM) sources a low current 5 volts on the A/C Evaporator Temperature (ACET) sensor circuit. As the A/C evaporator air temperature changes, the ACET circuit resistance changes (which changes the voltage the PCM detects).
Ford Vehicle:Ford Escape,Ford Focus Flexifuel,Ford Mustang,Ford Fusion,Ford Taurus,Ford F-Series,Ford Explorer,Ford C-Max,Ford Escape,Ford Edge,Ford Explorer,Ford Flex,Ford Expedition,Ford Transit Connect,Ford F1-50,Ford E-Series Wagon,Ford Super Duty,Ford Fusion Hybrid SE,Ford C-MAX Hybrid SEL,Ford C-MAX Energi,Ford Fusion Energi SE,Ford Fucos Electric,Ford E-Series Van,Ford E-Series Cutaway,Ford Super Duty Pick Up,Ford Chassis Cab,Ford F-650/F-750,Ford Stripped Chassis