1406 Code - 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 08-29-2008, 10:04 PM   #1
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Default 1406 Code

My 96 SSEi has the 1406 code. I removed the EGR, looks good, doesn't bind, pintle moves easily. The car runs perfectly. It also has the O2 sensor codes, both bank 1 and bank 2 (downstream). I replaced bank 2 last year when the light came on, was OK up until last week. Could a faulty EGR set the O2 codes? My mech said it could. Like I said, the car runs great! Any suggestions?
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Old 09-02-2008, 09:44 AM   #2
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I would probably try cleaning or replacing the EGR for starters.
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Old 09-02-2008, 06:58 PM   #3
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I tried cleaning it tonight. I'll see if the code clears. It looked very clean, no carbon. They want $148 for a new one...Sheesh....
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