99slobird

iTrader: (1)

please tell me what this is

eseibel67

iTrader: (10)

P1635 - 5V reference voltage to sensors low.

As always, check all fuses first. If all o.k., you might have a bad wire somewhere.

BOA279

iTrader: (1)

It is a 5 volt reference 1 circuit fault. The PCM uses a common 5 volt circuit as a sensor feed. This particular feed only goes to the A/C pressure sensor, EGR valve and MAP sensor. Check for loose/dirty plugs or wiring problems. It only has to do with those 3 items, wiring or the PCM.

99slobird

iTrader: (1)

finally someone with an answer ill check these tomorow and get back with yall