hey guys please help me out (2000 isuzu rodeo 4X4 LS owner)

1.- when i step on the gas, the brake pedal vibrates and then the ABS light comes on.
2.- the 4X4 doesnt engage (didnt have this problem before)
3.- Fuel gauge doesnt measure my gas (is it the floater or the fuel pump), i must says, i has lost some power
4.- i rebuild my tranny 3 years ago, the moment i pick it from the shop, the check trans and check engine came on, the guy from the shop told me is probably a sensor, he mentioned the oxygen sensor, what problems does a bad oxygen sensor do?

thank you

 

1) probably a bad abs-sensor or bad wiring to the sensor(s)
2) can't say, didn't happen to me yet, hopefully never will, if it does I will have to find out why. Shot in the dark: look for vacuum leak, I think it is vacuum actuated?
3) fuel sending unit inside the tank, bought one on ebay for 30 bucks - once its bad enough it will also set code (the CEL coming on)
oh and don't let them talk you into replacing the whole fuel pump and all! as long as your car is starting and running your pump is fine.
4) "probably" is not good enough, get the codes read (or get a scan gauge and diy - about 100 bucks on amazon), then you know more. Speculating doesn't get you far. If it is one or more oxygen sensor(s) it'll put the fuel injection system into limp mode since it doesn't get the correct signal of the amount of O2 in the exhaust gas, it will just go back to default values
and ultimately use more gasoline than necessary.

 

Bit of topic. I need to get a fuel sending unit cause my rodeo is already in lump mode. But what part to cry of eBay. Or anywhere else since I have no Isuzu dealer near me.

 

I need to get a fuel sending unit cause my rodeo is already in lump mode.