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Old 04-29-2004, 12:09 PM   #1
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Default code 56 any help please92 SSEI SUPER CHARGE

I'm getting a cade 56 . some fast idling at times. any help out there
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Old 04-29-2004, 12:20 PM   #2
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check the Techinfo for the codes
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Old 04-29-2004, 12:28 PM   #3
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Default code 56

did check , sun pro scaner Corrosivity/add coolant or port throttle system vacum sensor problems or quad driver B fault . but cann't find any info in my haynes repair mam... for last to items
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Old 04-29-2004, 02:53 PM   #4
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What is the year and trim line of your car?
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Old 04-29-2004, 03:33 PM   #5
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Default 56 code help

92ssei super charged
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Old 04-29-2004, 08:34 PM   #6
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Code 56 means you have a problem with the wiring to or the device itself:

1. Boost control solenoid
2. EGR
3. Transaxle or TCC

Does the SES light stay on at all times, or just when decellerating?
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Old 04-29-2004, 10:24 PM   #7
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Default code 56 92ssei

check engine light comes on decellerating.Does not stay on. where did u come up w/ that diagnostics for code 56 . not in the GM sunpro code scam. thank you
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Old 04-29-2004, 11:58 PM   #8
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If it only comes on when decellerating, I would say it'* your boost control solenoid. You need to replace it.

The diagnostic is from the GM service manual.

We have seen your problem numerous times before.

http://www.bonnevilleclub.com/forum/...pic.php?t=2066
http://www.bonnevilleclub.com/forum/...pic.php?t=4074
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Old 04-30-2004, 09:12 AM   #9
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Default code 56 ...92ssei super

read topic 2066 , 4074 my boost does go above 5 and up. cann't locate boost solenoid. only plastic cover is for wire harness . can u helk . thanks for the great input!!!
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Old 04-30-2004, 02:19 PM   #10
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I think I've seen pictures of them posted here before. Do a search for "boost control solenoid"
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