car running to lean

Wiley · June 27th, 2008, 05:57 PM

ok so my service engine light came on and i took it to autozone and it was throwing a PO171 and a PO174 code. it said it was running too lean so am i gonna hafta replace the O2 sensors or the MAF sensor? has anyone else had this problem?

Wiley · June 28th, 2008, 03:34 AM

nevermind i fixed it today

joparrett · June 28th, 2008, 12:22 PM

what was the problem?

Xantho99 · September 6th, 2008, 07:58 PM

I had that today, what did you do to fix it?

ByPopularDemand · September 7th, 2008, 08:36 AM

I remember throwing those codes...one is for lack of oxygen, and one is for running lean. I would assume he either replaced the faulty o2 sensor, or it cleared itself since the sensor isn't completely bad.

Avaric3 · September 7th, 2008, 01:16 PM

i have those same codes and idk how to fix them, i thought it was a vacuum leak cuasin it but i fixed that and its still throwing the same codes

joe_shizzle · September 12th, 2008, 12:21 AM

yes i could be a fulty o2 sensor..or it could b the maf is dirty.. try using some rubbing alchol..just dab a little on it..and dry it clean..that should fix the problem.. if not the o2 sensor is bad..or it could be that your cat is crap..and not doin its job..

ByPopularDemand · September 12th, 2008, 01:26 PM

Use carb cleaner on the maf...or better yet maf cleaner. yeah they sell it. And those codes do mean replace the faulty o2 sensor

June 27th, 2008, 05:57 PM	#1
Wiley Regular 2007 Mustang GT Join Date: Dec 2006 Location: N.C. for now... Posts: 63 iTrader: 0 reviews	car running to lean ok so my service engine light came on and i took it to autozone and it was throwing a PO171 and a PO174 code. it said it was running too lean so am i gonna hafta replace the O2 sensors or the MAF sensor? has anyone else had this problem?

June 28th, 2008, 12:22 PM	#3
joparrett Regular 2003 Mustang 3.8 slow Join Date: Apr 2008 Location: Indiana Posts: 157 iTrader: 0 reviews	what was the problem? __________________ Jordan \| 2003 Mustang 3.8 \| SCT Tuner by VMP \| CAI \| Flowmasters \| ZEX 75 shot

September 6th, 2008, 07:58 PM	#4
Xantho99 Regular Join Date: Nov 2007 Location: Waco TX Posts: 255 iTrader: 0 reviews	I had that today, what did you do to fix it? __________________ 2002 GT

September 7th, 2008, 08:36 AM	#5
ByPopularDemand Hardcore Enthusiast 2000 V6 Join Date: Jan 2007 Location: Albuquerque Posts: 2,670 iTrader: 0 reviews	I remember throwing those codes...one is for lack of oxygen, and one is for running lean. I would assume he either replaced the faulty o2 sensor, or it cleared itself since the sensor isn't completely bad. __________________ 2000 V6 vert Mac LT headers, Mac O/R H-pipe, Mac CAI, ASP 25% underdrive pulley(r.i.p), SCT tune, 8.8 rear and 4.10 gears.

September 7th, 2008, 01:16 PM	#6
Avaric3 Hardcore Enthusiast 2002 Ford Focus slow as fuck Join Date: Apr 2007 Location: M-Pan, NJ Posts: 2,561 iTrader: 4 reviews	i have those same codes and idk how to fix them, i thought it was a vacuum leak cuasin it but i fixed that and its still throwing the same codes __________________ 99 V6 Mustang-sold 02 Ford Focus-sold 98 Camaro Z/28-lid, catback

June 28th, 2008, 03:34 AM	#2
Wiley Regular 2007 Mustang GT Join Date: Dec 2006 Location: N.C. for now... Posts: 63 iTrader: 0 reviews	nevermind i fixed it today

September 12th, 2008, 12:21 AM	#7
joe_shizzle Regular 1999 3.8l v6 14.7 @ 100mph Join Date: Apr 2008 Location: Elign Il 60123 Posts: 56 iTrader: 0 reviews	yes i could be a fulty o2 sensor..or it could b the maf is dirty.. try using some rubbing alchol..just dab a little on it..and dry it clean..that should fix the problem.. if not the o2 sensor is bad..or it could be that your cat is crap..and not doin its job..

September 12th, 2008, 01:26 PM	#8
ByPopularDemand Hardcore Enthusiast 2000 V6 Join Date: Jan 2007 Location: Albuquerque Posts: 2,670 iTrader: 0 reviews	Use carb cleaner on the maf...or better yet maf cleaner. yeah they sell it. And those codes do mean replace the faulty o2 sensor __________________ 2000 V6 vert Mac LT headers, Mac O/R H-pipe, Mac CAI, ASP 25% underdrive pulley(r.i.p), SCT tune, 8.8 rear and 4.10 gears.

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