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1998 s10 check engine light

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Old 12-05-2010, 10:41 PM   #1
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1998 s10 check engine light

Hey forum

I recently bought a 1998 chevy s10 extended cab 4x4 with a 4.3 litre v6 vortec engine and 135,000 miles.

Naturally, I need to replace the lower ball joints, and possibly my pitman and idler arms.

But my question is: the check engine light has been going on and off since i've had it, and i got the codes, which came out as:

P0131 - O2 sensor circuit low volts, bank 1 sensor 1
P0151 - O2 sensor circuit low volts, bank 2 sensor 1
P0131 (again)
P0143 - O2 sensor circuit low volts, bank 1 sensor 3
P0151 (again)

The shop where I checked it at said that this is unusual and suggested that something else may be triggering these results. Does anyone have a clue what the culprit could be?
Old 12-06-2010, 07:45 PM   #2
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Re: 1998 s10 check engine light

Quote: Originally Posted by jasonmcampbell
Hey forum

I recently bought a 1998 chevy s10 extended cab 4x4 with a 4.3 litre v6 vortec engine and 135,000 miles.

Naturally, I need to replace the lower ball joints, and possibly my pitman and idler arms.

But my question is: the check engine light has been going on and off since i've had it, and i got the codes, which came out as:

P0131 - O2 sensor circuit low volts, bank 1 sensor 1
P0151 - O2 sensor circuit low volts, bank 2 sensor 1
P0131 (again)
P0143 - O2 sensor circuit low volts, bank 1 sensor 3
P0151 (again)

The shop where I checked it at said that this is unusual and suggested that something else may be triggering these results. Does anyone have a clue what the culprit could be?
Check the o2 sensors for lose wiring or open wires. Its throwing codes for both sensors so im guessing it may be a short somewhere in the system. Id hate to say just throw new ones on but just check the wires first. If it isnt staying on I wouldnt worry about it too much.
Old 01-06-2011, 05:38 AM   #3
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Re: 1998 s10 check engine light

I think i figured it out.

On some cold mornings lately, my truck has been dead after sitting throughout the night to the point where I needed it jumped. I took it to an O'reilly's and the guy working there tested my battery.

He said that the symtoms sound like it could be a bad cell inside the battery, so I went to Walmart and bought a new battery and my truck starts great every time.

Is it possible that a bad cell inside the battery was causing my O2 sensors to receive less voltage, therefore triggering the check engine light?
Old 01-07-2011, 01:16 PM   #4
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Re: 1998 s10 check engine light

I have a 98 2.2 and mine goes off an on randomly too. Haven't pulled the codes though. If I remember right though, I think that there was a recall on the 98's for the computer so it could just be invalid error codes. I'll look and see if I can verify that though.

Edit: Well, I couldn't find the recall I was looking for but I did find a sh*t load of other recalls for 98...http://www-odi.nhtsa.dot.gov/cars/pr...ls/results.cfm My dad was the one who told be about the computer recall bc he owned it at the time and didn't feel like taking it in.
Old 01-07-2011, 10:27 PM   #5
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Re: 1998 s10 check engine light

Oh wow, that is a few recalls haha.. I've noticed that my windows fog up really quick, so that one didnt surprise me.
Old 01-08-2011, 03:51 AM   #6
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Re: 1998 s10 check engine light

are you sure its the lower ball joints and not the upper ones?

the ones that wear and break/pull apart on these years always are the upper ones, ive seen it happen personalyl several times and its very uhmm interesting to say the least, and not pretty...


lower ones always been fine
Old 01-08-2011, 03:07 PM   #7
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Re: 1998 s10 check engine light

Yeah, im pretty sure. I went to get an alignment done and the guy said that if he did it, it wouldnt hold because my lower ball joints, idler arm, and pitman arm are bad. (~$800)

I went to another mechanic for a second opinion and he said that my arms are fine, but my lower ball joints need replacing. He wanted $430

So as soon as we both have a day off, me and my uncle are gonna get under there and replace the joints on our own.
Old 01-08-2011, 09:16 PM   #8
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Re: 1998 s10 check engine light

Quote: Originally Posted by jasonmcampbell
Hey forum

I recently bought a 1998 chevy s10 extended cab 4x4 with a 4.3 litre v6 vortec engine and 135,000 miles.

Naturally, I need to replace the lower ball joints, and possibly my pitman and idler arms.

But my question is: the check engine light has been going on and off since i've had it, and i got the codes, which came out as:

P0131 - O2 sensor circuit low volts, bank 1 sensor 1
P0151 - O2 sensor circuit low volts, bank 2 sensor 1
P0131 (again)
P0143 - O2 sensor circuit low volts, bank 1 sensor 3
P0151 (again)

The shop where I checked it at said that this is unusual and suggested that something else may be triggering these results. Does anyone have a clue what the culprit could be?
Check the CAT.
Old 01-08-2011, 11:50 PM   #9
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Re: 1998 s10 check engine light

Quote: Originally Posted by tj.hotrod
Check the CAT.
What am I looking for?
Old 01-09-2011, 10:16 PM   #10
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Re: 1998 s10 check engine light

Exaust pipe. The thing that looks like a muffler, but is in front or the muffler. t could be stopped up.
Old 01-09-2011, 10:24 PM   #11
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Re: 1998 s10 check engine light

i knew what the cat was, just not what to look for that could be causing the issue. i'll check the t
Old 02-23-2011, 07:24 PM   #12
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Re: 1998 s10 check engine light

Is it possible that a faulty alternator was causing the issue?

Since I have replaced my alternator a week ago, the light hasn't come back on *knocks on wood*
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