CEL popped up, and took it to oreiley and used their scanner
i got 4 codes.


P1136 lift additive too lean bank 1
P0455 emission control leak (02 sensor?)
P1138 lift additive too lean bank 2
P0441 incorrect purge flow (N71 solenoid?)

i looked through the documents that the previous owner gave me of records, and it says that it has had multiple 02 sensor replacements, both front and rear.

 

You have a vacuum leak somewhere, possibly in the vacuum line to the purge solenoid valve that is mounted on top of the throttle body (at least on a 2.8L 12V engine). The purge line sucks fumes from the gas tank when the N71 solenoid opens, if the vacuum line is off, or broken you will not get any flow in the line (which is measure by a pressure drop in the gas tank after the valve is commanded open).

 

Alright, that sounds like it. Because all of my other codes have been vaccuum related. I'll probably just end up replacing them all.

 

Was there a solution to this?

I'm getting the same four codes. Just replaced my MAF and gas cap with new parts.

Replaced all vacuum tubing a little while back. Going to spray brake cleaner on each vacuum lines and see if the idle shoots up.

Should I check my fuel pump? If yes, how.

How can I test the EVAP purge valve?

I have VAG-COM.