P1635 Lexus 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 Lexus 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 Lexus 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.
Lexus Vehicle:Lexus ES,Lexus GS,Lexus GX,Lexus HS,Lexus IS,Lexus LFA,Lexus LS,Lexus LX,Lexus RX,Lexus RX,Lexus SC,Lexus GS350,Lexus GS450H,Lexus IS250,Lexus GX460,Lexus IS350,Lexus LS460,Lexus LS600H,Lexus LX570,Lexus RX350