P1635 Acura 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 Acura 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 Acura 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.
Acura Vehicle:
Acura ILX, Acura MDX, Acura RDX, Acura RLX, Acura TL, Acura TSX, Acura ZDX, Acura CSX, Acura EL, Acura Integra, Acura RSX, Acura Legend, Acura Vigor, Acura CL, Acura SLX, Acura NSX, Acura RL, Acura ZDX