P1635 CHEVROLET - 5-Volt Reference Circuit Low Conditions
- A/C Pressure sensor harness is open or shorted
- MAP sensor harness is open or shorted
- EGR valve harness is open or shorted
When is the code detected?
The P1635 code is set when the reference voltage from the sensor is our of range.
- Engine Light ON (or Service Engine Soon Warning Light)
P1635 CHEVROLET Description
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