1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

96 k1500 -four O2 sensor codes?

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Old Jan 9, 2022 | 7:56 AM
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Mike-g's Avatar
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Default 96 k1500 -four O2 sensor codes?

Hello again,

​​​​​​my Chevy k1500 had 270k on original engine. It runs rich and a little rough at times, sometimes hard to start, too.

We recently checked the codes and it returned four oxygen sensor codes:

p0141 p0151 p0154 p0158. It also returned p0300, multiple cylinder misfire.

Where do you suggest to start? Is it as simple as four bad oxygen sensors?
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Old Jan 9, 2022 | 8:35 AM
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kevinkpk's Avatar
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From: kevinkpk
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Originally Posted by Mike-g
Hello again,

​​​​​​my Chevy k1500 had 270k on original engine. It runs rich and a little rough at times, sometimes hard to start, too.

We recently checked the codes and it returned four oxygen sensor codes:

p0141 p0151 p0154 p0158. It also returned p0300, multiple cylinder misfire.

Where do you suggest to start? Is it as simple as four bad oxygen sensors?
I'd replace them, then go from there.
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Old Jan 9, 2022 | 11:04 AM
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Stockdale Dave's Avatar
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Sounds just like my '97 did for a while. Ended up being the fuel pressure regulator. Smell the dipstick and see if it smells like gas since when they go bad gas gets dumped in the crankcase.
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