P1635 Ford 5 Volt Reference Circuit
Possible causes
– A/C Pressure sensor harness is open or shorted
– MAP sensor harness is open or shorted
– EGR valve harness is open or shorted
– MAP sensor harness is open or shorted
– EGR valve harness is open or shorted
What about the obd code?
The P1635 Ford code is set when the reference voltage from the sensor is our of range.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1635 Ford Description
The Powertrain Control Module (PCM) uses a common 5.0 Volt Reference 1 circuit as a sensor feed. This circuit supplies 5 Volts to the following sensors: The Air Condition (A/C) Pressure sensor, the Manifold Absolute Pressure (MAP) sensor and the Engine Gas Recirculation (EGR) valve. The PCM monitors the voltage on the 5.0 Volt Reference 1 circuit.
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