Code 55? - 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 03-05-2004, 08:22 PM   #1
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Default Code 55?

My check engine light came on the other day in my SSEi and after a bit of driving around it went off. Hasn't came back on since,but I decided to pull codes. I came up with a 55. Something about the EGR. Well anyway how do I go about testing one of these and what are some symptoms of EGR problems. I car runs fine and has no issues except every once in a great while when starting it cold it will start and die and then start back up and run fine.
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Old 03-05-2004, 08:52 PM   #2
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That'* the large solenoid on your EGR. It'* not functioning properly.
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Old 03-06-2004, 12:47 AM   #3
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So how do I go about checking the solenoid to find out what'* wrong?
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Old 03-06-2004, 01:13 AM   #4
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Get some WD-40 and a toothbrush, and spray/scrub/clean the shafts and springs of the solonoids. You don't have to remove it. This will usually fix a digital EGR problem.
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Old 03-06-2004, 01:42 AM   #5
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I removed mine, and did what Bill recomended. The EGR has not thrown a code in months, actually it was Halloween night the SES light came on...
Works wonders, and sure is alot cheaper than replacing the whole EGR unit!
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Old 05-04-2004, 06:24 PM   #6
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Quote:
Originally Posted by willwren
Get some WD-40 and a toothbrush, and spray/scrub/clean the shafts and springs of the solonoids. You don't have to remove it. This will usually fix a digital EGR problem.
Should that work for a code 54 too? (small solenoid?)
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Old 05-10-2004, 12:49 AM   #7
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Should work for both solenoids on your car, if that'* the problem.
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