Code 31, 34, and 52 question

[suprafanatic]

So my check engine light is on. Its throwing 3 codes. I checked the TSRM. Code 31 which is the AFM signal. Code 34 which is abnormal turbo pressure. and code 52 which is something wrong with the knock sensor wiring. The car is running good so im not totaly sure what the issues are with codes 31 34. What does it mean by abnormal turbo pressure?? As for the code 31 with the AFM im going to check the resistance between the terminals to see if its bad.. I dont know how it would be bad yet still run fine though? are there any other issues that could be going on with the AFM other than it being completely bad?

 

[jdub]

Might be old stored codes...clear them by pulling the EFI fuse for a minute. Drive for a day or too and recheck.

BTW - code 34 is what you get when you hit fuel cut.

 

[suprafanatic]

ok, i was wondering if it had to do with fuel cut. Anyway when i start the car the check engine light doesnt come on instantly, its like i have to hit a certian speed before it kicks on and stays on. Also when i pull the fuse to reset everything the check engine light still comes right back on.

 

[RedGT]

I would tackle the code 52 first. Do the Knock sensor rewire. When I had code 52 It wouldnt set right away, only after a minute or two of driving. It wont set at idle.

 

[suprafanatic]

do you think it would have to do with the SAFC being wired into the knock sensor at the ECU?

 

[jdub]

Well, if you did what I told you, we would know what codes we are dealing with.

 

[Zumtizzle]

Knock Sensor takes a few revs before the light comes on.