1.8L cel code p0171

[texsprsonic]

Couldn't find a thread for this code for the 1.8. So I've got the 1.8 with 19000 miles. I've had a cold RAM intake and custom cat back exhaust on it for about 3 months. It just threw. The code p0171 bank 1 is lean. It hasn't been running any different so I'm wondering if it could be a delayed reaction from the intake. Any ideas?

 

[KlassKlown]

Couldn't find a thread for this code for the 1.8. So I've got the 1.8 with 19000 miles. I've had a cold RAM intake and custom cat back exhaust on it for about 3 months. It just threw. The code p0171 bank 1 is lean. It hasn't been running any different so I'm wondering if it could be a delayed reaction from the intake. Any ideas?

maybe try reverting back to the stock airbox and see if that makes a difference?

 

[$ub$onic]

There are tons of threads on this code, using google is the best way to search.

Sonic owners forum (insert search here).


Anyways, it's a lean code commonly related to a leak in the air intake, what intake do you have?

 

[mitdr774]

Depending on the intake and/or filter used it could still throw codes for lean or fuel trim issues. I am running a DDMWorks intake and with the unifoam filter it fuel trims were as if it was a stock intake, however when I switched to an AEM filter I had fuel trim issues. I had to adjust my MAF tables to correct the issue. Thankfully I have HPT and can do it myself. If I was running a canned tune I would have had to shell out money for an updated tune.


From a quick search on here.

http://www.sonicownersforum.com/for...iscussion/9876-cracked-air-intake-piping.html

http://www.sonicownersforum.com/forum/maintenance-care/17277-check-engine-light.html

http://www.sonicownersforum.com/forum/general-discussion/15989-2012-sonic-ltd-issues.html

http://www.sonicownersforum.com/forum/general-discussion/15061-new-used-sonic-dual-cel-codes.html

I think these are all for the 1.8 but a 1.4 may have slipped in there. Check all connections for being loose or damaged.