code 56 any help please92 SSEI SUPER CHARGE
 

I'm getting a cade 56 . some fast idling at times. any help out there

check the Techinfo for the codes

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

What is the year and trim line of your car?

56 code help
 

92ssei super charged

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?

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

If it only comes on when decellerating, I would say it's 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

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!!!

I think I've seen pictures of them posted here before. Do a search for "boost control solenoid"