Engine code query [Archive] - Projekt German Forums

sic_A4

10-04-2009, 08:38 PM

So, My sister in law has a 97 Jetta with a 2.0. It keeps kicking on a cel. We took it up to autozone and they gave me 2 codes that it was throwing. The first one is P0172 and the second is P0442. I think both these codes are fuel system related but I'm not sure. I tried disconnecting the battery to reset the computer, but the cel comes right back on as soon as I start up the car. The car does run fine. It hasn't kicked into limp mode. I am not very familiar with MkIII's at all. Should disconnecting the battery clear the codes or do they need to be wiped? If anyone has any insight on these 2 codes, it would be greatly appreciated. Thanks guys!

John2.0T

10-04-2009, 09:57 PM

They couldn't tell you a definition for the code?

Hate to "toot my own horn" because I'm really not... but if you go to a local Advance auto parts and have the CEL tested, the code reader will give you a definition for the code that is found.

At least that way you can narrow it down. And its still a free check.

rubberpenguin

10-04-2009, 10:11 PM

i work for advance as well... hes telling you the truth... lol and i know there is one in moline... i will be there for manager meeting on the 22nd

benstuh

10-04-2009, 10:52 PM

you would have to either fix the problem or use a vagcom to find out what the problem is and clear it . thats from what i heard..

vrjetta98

10-04-2009, 11:41 PM

P0172 This is familiar because it happend to me its the to rich code wich I used to get and it comes and goes until I got new plugs.

GetAwayFromMe

10-05-2009, 12:25 AM

P0172= System to rich
p0442=Evaporative emission system leak

First code could be a few things. Fuel pressure regulator, dirty injectors, evap purge regulator valve ect. Since you got a second code for evap leak i would bet that the rich code comes from the second one.

Your evap canister is cracked or the evap purge ragulator valve is bad or leaking.

sic_A4

10-05-2009, 12:56 AM

Thanks guys. They did give a definition with the two codes but they were very broad and mentioned the gas cap, fuel pump, injectors, o2 senser, as well as a few other possibilities. I thought one of you guys would be able to narrow it down better for me. You gave me a much better place to start than autozone. Thanks again.