baldwintpenguin

Ok so I bought my car and apparently it has no oxygen sensor (previous owner deleted it when he put new exhaust on) Well my car still throws the check engine light on. My question is, is this somthing that would be safe to just get tuned and leave it without o2 sensor, or is this somthing I need to replace? I've done research, but come up with two different answers...its not important...and that it can hurt the engine cause when it has no o2 sensor to regulate the amount of air that comes in it makes the computer guess and can keep bad emissions in your engine and hurt it. Whats the best thing to do about this? Thanks!

2001NBMZ28

What's the code? Is it for a rear 02?

RPM WS6

iTrader: (3)

If it's a rear O2 then don't worry. It won't hurt a thing, and has zero effect on A/F or power. If it's a front O2 then you need to install a new sensor ASAP.

camross998

iTrader: (2)

i have the same problom but i want to know how many o2 senosor does the 1998 Z28 have and I'm also throwing Check Engine Light the codes are P0131,P0137,P0151,P0157,P0171,P0174 could some one tell what these codes mean thanx and I just sold my 1995 impala ss for the Camro and I luv thanx again guys

RPM WS6

iTrader: (3)

Your '98 Z28 has 4 O2 sensors. One in front of each cat, and one behind each cat. The front sensors are the only ones that have any effect on how the car runs. The rears only tell the PCM whether or not the cats are working properly.

Here is the breakdown of the DTCs you're getting:

P0131: O2 sensor circuit low voltage (B1S1 = Front left sensor)
P0137: O2 sensor circuit low voltage (B1S2 = Rear left sensor)
P0151: O2 sensor circuit low voltage (B2S1 = Front right sensor)
P0157: O2 sensor circuit low voltage (B2S2 = Rear right sensor)
P0171: [Fuel] System too lean, (B1 = Left bank of motor)
P0174: [Fuel] System too lean, (B2 = Right bank of motor)

Either all your O2 sensors are bad, or more likely you have some damaged wiring somewhere.

camross998

iTrader: (2)

ok well I know that it only have three O2 the 2 before the cat and 1 after the cat on the passger side cause i only have 1 cat they guy i got the car from said that the check engine light came on after they put the flow master on is it possible for the all 3 of them to be bad or this wire problem i may have what should i look for and also cause i just got the car the the intake air temperature sensor was disconnected and at the end you plug in into the sensor was a wire plugged in into it what could that mean and why they did and could it also throw ah check code if its bad IAT sensor thanks for answering new and i just got the car and new to the the hole LS1 F- Body thing thank again