Advice and questions on bad O2 sensor

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Apr 15, 2004 | 05:17 PM

carden

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Advice and questions on bad O2 sensor

So I am a total newbie when it comes to my camaro. But the check engine light came on a while back and I got a friend to get the codes off it for me.

Now if I am reading them correctly most of them seem like they might be related.

My car is a 1998 Z28 Camaro.

The DTC codes are:
P0131 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1 Sensor 1
P0135 - Heated Oxygen Sensor (HO2S) Heater Bank 1 Sensor 1
P0137 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1 Sensor 2
P0151 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 1
P0157 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 2
P0300 - Engine Missfire Detected
P0430 - TWC System Low efficiency Bank 2 (Catalytic Threashold)

The car has 76K miles on it.

But my question is, how difficult is it to replace the sensors and aside from the Missfire, which I would assume is a tuneup problem, would replacing the O2 sensor(s) fix most/all of these problems?

Thanks for any input on this.

Apr 16, 2004 | 10:38 AM

blk~2000~Z28

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From: Marysville, OH

Quote:

P0300 - Engine Missfire Detected

I would start there. I have seen to many people have missfires and the missfires caused their O2 problems. Check your plugs, wires, coil packs, and the plugs to the coil packs very thoroughly. I had a burnt wire that caused my O2 codes b/c of the unburnt fuel being dumped on them. There was also a thread recently about the main white connector on one of the cylinder banks being slightly unplugged and the person was having all kinds of issues. Before you start replacing costly O2 sensors check over everything.

Apr 16, 2004 | 12:16 PM

carden

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Thanks for the reply, I also talked to the dealership and they told me it is unlikely that all 4 sensors would fail at once, So I think I am going to pay the 89$ to have them put it on their diagnostic machine.

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