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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-06-2009, 02:00 AM   #1
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So my engine light was on for like a week because i didnt have a chance to get it checked. When I finally get it checked i get the codes p0300,p0133 and p0102..(i think...the papers are upstairs). but then the light went off...came back on for a day then went back off so idk if I should buy the new O2 and MAF sensor or wat?
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Old 12-06-2009, 02:06 AM   #2
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I would check the wiring on those items.....Maybe they are close to coming unplugged or something might have a short in them..... As far as the MAF sensor.....Get you a can of MAF sensor cleaner. and clean the wires that are on the inside of it. Hope this helps.
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Old 12-06-2009, 09:52 AM   #3
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Looking at the codes, this is what I see. The MAF sensor is reading low, your then getting a misfire and that'* causing a problem with the O2 sensor. The problem is most likely with the MAF sensor. Clean it with MAF cleaner. If no improvement, then check for vacuum leaks.
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