symptoms of bad Oxygen sensors

[Ehatcher]

What are the symptoms of a bad Oxygen sensor and will a bad one make the car run like complete ***? hesitation under 2500 rpm and backfiring . HELP!

[orangeapeel]

Hesitation is a good first sign. You getting a SES light? If so go get the code read.
It might come up as one of these:
P0130 (M) 1/1 O2 Sensor Heater Circuit Malfunction Oxygen sensor heater element malfunction.
P0131 (M) 1/1 O2 Sensor Shorted To Ground Oxygen sensor input voltage maintained below normal operating range.
P0132 (M) 1/1 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.
P0133 (M) 1/1 O2 Sensor Slow Response Oxygen sensor response slower than minimum required switching frequency.
P0134 (M) 1/1 O2 Sensor Stays at Center Neither rich or lean condition is detected from the oxygen sensor input.
P0135 (M) 1/1 O2 Sensor Heater Failure Oxygen sensor heater element malfunction.
P0136 (M) 1/2 O2 Sensor Heater Circuit Malfunction Oxygen sensor heater element malfunction.
P0137 (M) 1/2 O2 Sensor Shorted To Ground Oxygen sensor input voltage maintained below normal operating range.
P0138 (M) 1/2 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.
P0139 (M) 1/2 O2 Sensor Slow Response Oxygen sensor response slower than minimum required switching frequency.
P0140 (M) 1/2 O2 Sensor Stays at Center Neither rich or lean condition is detected from the oxygen sensor.
P0141 (M) 1/2 O2 Sensor Heater Failure Oxygen sensor heater element malfunction.
P0143 (M) 1/2 O2 Sensor Shorted To Ground Oxygen sensor input voltage maintained below normal operating range.
P0144 (M) 1/2 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.
P0145 (M) 1/2 O2 Sensor Slow Response Oxygen sensor response slower than minimum required switching frequency.
P0146 (M) 1/2 O2 Sensor Stays at Center Neither rich or lean condition is detected from the oxygen sensor.
P0147 (M) 1/2 O2 Sensor Heater Failure Oxygen sensor heater element malfunction.
P0151 (M) 2/1 O2 Sensor Shorted To Ground Oxygen sensor input voltage maintained below normal operating range.
P0152 (M) 2/1 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.
P0153 (M) 2/1 Sensor Slow Response Oxygen sensor response slower than minimum required switching frequency.
P0154 (M) 2/1 Sensor Stays at Center Neither rich or lean condition is detected from the oxygen sensor.
P0155 (M) 2/1 O2 Sensor Heater Failure Oxygen sensor heater element malfunction.
P0157 (M) 2/2 O2 Sensor Shorted To Ground Oxygen sensor input voltage maintained below normal operating range.
P0158 (M) 2/2 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.
P0159 2/2 Sensor Slow Response Oxygen sensor response slower than minimum required switching frequency.

[Scotty-Z]

Yeah, the heat elements in mine started going out. Whenever it was colder out during the fall, winter, and early spring, I got an SES light because the 02s weren't heating up correctly/quick enough.

[Z28LS1camaroguy]

first check the fuse under the hood, its engine sensor and its a 20 amp. but if that doesnt work some symptoms would be like posted above and really shitty gas mileage.

[Ehatcher]

My SES light is on . I had it scanned before at autozone , I had multipe cylinder misfire, bank 1 and 2/sensor 1 were thrown ( dont know the specific code , the dumbass at autozome wouldnt tell me ) , The MAF was throwing one also . So 4 codes in all . I Got under the car and found that the drivers side sensor was hand loose , so i tightened it and adjusted my lid . Went back to have the car scanned. It was throwing the Multiple cylinder misfire and bank 2 sensor 1 . After more searching for the problems , i turned to the spark plugs and wires. I found out that the #5 and 7 spark plugs were hand loose . took all the plugs out ( Ngk Irridium tr55 ) and inspected them , they seemed fine so i cleaned them and re-installed. The plug wirea are Gm replacement Omnispark from oreilly's . I have MSD wires waiting on installation. I Have yet to have the car scanned again , but it is seemingly running worse than before. It bogs out from 1000-2500 and it backfires like crazy. Could the cheap wires and a possible bad 02 sensor cause this? The plugs are gapped accordingly to the Haynes manual at .060.

[Ehatcher]

The car also began to run worse after i installed the TSP Duals. I was thinking maybe the drastic change in exhaust flow made one of the sensors crap out? Causing the car to run like ***.

[Z28LS1camaroguy]

Thats a good possiblility, did you check that fuse i told you about?????? my car ran like **** even after i got new bosch sensors and come to find out it was a simple 20 amp fuse was blown.

[Ehatcher]

i will check that fuse ASAP. What would cause the backfire? The Engine reading lean , dumping more fuel , and the unburnt fuel ingniting in the exhaust? All because of the O2 sensors? or do i have a different problem? I could handle a little bit of a backfire, but this sounds like a .22 going off at times.

[Z28LS1camaroguy]

yeah if your 02s are reading bad then the car will run really rich and to much fuel going through the injectors isnt a good thing.

[davered00ss]

SES light.

[Havok2]

ill check the fuse tomorrow

[Havok2]

nope, not the fuse for me.

[ILLWS6]

I have had these problems with bad o2's.

[dalejr8ls1]

I would think you would be throwing at least some lean codes, in which case replacing the O2's or a vaccum leak is in order. Make sure your MAF is clean and debres didnt get on the screan. I'm supprised your plugs didnt show any signs of your running condition...