Occasional SES light - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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 05-12-2010, 12:20 PM   #1
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Default Occasional SES light

I've got a 93 SE and the SES light comes on for a little bit and goes off, then on again with no noticable pattern. I checked it, and its a 43(Knock Sensor). Does anyone know what this may be?
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Old 05-12-2010, 06:22 PM   #2
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Could be the connection at the sensor(*) itself. It'* one wire that goes to each sensor. I can't remember if the Series I has one or two knock sensors. They are located below each exhaust manifold and screw into the block itself.
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Old 05-12-2010, 06:26 PM   #3
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I believe the series1 has 1 sensor. Unplug it and clean up the connections. See if that corrects the problem.
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