Cel - P0171

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Dec 1, 2008 | 11:25 AM

#16

Green_Bandit

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From: Tallahassee, Fl

Quote:

Originally Posted by itscypha

damn im getting this code now too. and im thinking its piggyback but yours wasnt piggyback. mods: cai, 2 1/2 high flow cat 2 1/2 piping on exhaust, header and o2 put after cat so the dumb rich code would go away pigguback v1 and rrm crank pulley. trying to figure out how to get rid of it. im also gettin p0141 as good luck runs it. which is 02 heater circuit malfunction. think its as simple as my 02 gone bad? or maybe piggyback or maf or even cai? any help would be appreciated.

I have those same two stupid codes but I'm turboed. i don't think it would be a good idea to run seafoam through my system. Eventually they went away for about a day then came back. I replaced my first O2 sensor and cleared but it came back. It seems as though my idle triggers it. Because its fine when driving but as soon as I pt it in park or neutral bang! My idle dips and the CEL comes on. I do have a lumpy idle (650-900) I don't have an aftermarket FPR so I'm kinda stumped on what to do.

If anyone has a tip it would be greatly appreciated!

Jan 8, 2009 | 05:30 AM

#17

RaiNFaLL

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Joined: Apr 2008

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From: Montreal,Quebec

i just got this code yesterday. =( just installed intake manifold and throttle body and got the code couple days later..

help meeee

Jan 8, 2009 | 05:36 AM

#18

magyar86

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From: league city, texas

ive been seeing alot of cars (evos tho) that have this problem when there injector scaling is all screwed up and the code is comming from one of the long term fuel trims is maxxed out (+ or - 12.5%) but it could also come from low fuel pressure as the OP found out

Apr 7, 2010 | 07:29 PM

#19

bgioan

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Joined: Jan 2010

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From: RSM,CA

I am getting this code also with no idea. Please someone help me out. I had my 1st O2 sensor giving me problems and I am going to change it but I get 2 error codes. P0171 and P0135

Apr 7, 2010 | 07:40 PM

#20

03lances

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From: West Coast WA

I would first change out that sensor since both of those codes pertain to the 02 sensor. Then reset the cel and see if anything comes up.

Apr 8, 2010 | 11:39 PM

#21

bgioan

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From: RSM,CA

Quote:

Originally Posted by 03lances

I would first change out that sensor since both of those codes pertain to the 02 sensor. Then reset the cel and see if anything comes up.

I actually erased the codes without changing the O2 sensor and the lean system code when away and the O2 sensor remained. I changed the O2 sensor later that day (today) and no more CEL.

I am happy to report!

Just wondering where would i find a new tactrix cable? This is the OBDII plug plus the other little white one right? Because I want to alter my ECU and flash it.

Apr 8, 2010 | 11:44 PM

#22

03lances

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From: West Coast WA

The bigger black one is the obd II port, the little white one I think is called the boot strap? could be wrong but I do know you need the cable that has the whit plug too because its what is used to trigger flash mode for the ecu so you can overwrite it. I have been turboed since november now with both 02 sensors still in and wideband installed self tuned and I havent had a single CEL