P0171 code 99 Tacoma

Asked by Mar 18, 2016 at 07:37 PM about the 1999 Toyota Tacoma SR5 V6 Ext. Cab 4WD

Question type: Maintenance & Repair

Truck CEL came on, code P0171 this has happened
before of course, cleaned MAF sensor, replaced
front 02 sensor a year ago, went ahead and
replaced back 02 sensor, still throwing the code.
New air filter, fuel filter. Today while pulling out of
driveway, the gas is bogged down, never going
above 3000 rpm's with the pedal to the floor and
possible misfiring, or clear disconnect for fuel. Only
code it's thrown is P0171. Now this weird gas/fuel
issue of power. Cleaned battery terminals, checked
and replaced a few small hoses that looked worn,
checked transmission fluid, brake fluid, all fluids.
Still no luck. Any idea. I'm supposed to be driving
this bad boy 2500 miles this weekend and I was
never afraid before, now I am.

3 Answers

246,125

P0171 is a lean code. Usually a vacuum leak.

So short of a smoke test, any other ways to find it? I tried spraying carb cleaner to see if I saw any bubbles, all hoses look good.

246,125

I have the engine running and move the hoses by hand and watch if the idle goes up or down or you hear hissing. Watching out for the belts and fans. Might be a gasket that you can't detect without a smoke test.

Your Answer

Add photo

Related Questions

  • P0171 code 99 Tacoma 3 answers

    Truck CEL came on, code P0171 this has happened before of course, cleaned MAF sensor, replaced front 02 sensor a year ago, went ahead and replaced back 02 sensor, still throwing the code. New air ...

    1999 Toyota Tacoma SR5 V6 Ext. Cab 4WD

    -

    Maintenance & Repair

  • toyota tacoma 4 answers

    i heard that the 2005+ tacoma has transmission issues for the v6 models. my dads thinking about the 2009 tacoma any recommends. hes swiching from a 97 tacoma to 2009 tacoma

    2005 Toyota Tacoma

    -

    Maintenance & Repair

  • Steering on Toyota Tacoma 8 answers

    Does anyone else have trouble steering their tacoma from a stand still? I mean, backing out of parking spots, when you're going really slowly, my steering wheel is REALLY hard to turn, its do-able but...

    2005 Toyota Tacoma

    -

    Maintenance & Repair

  • My 2016 Tacoma 6 answers

    I got my 2016 Tacoma checked out due to a noise on the front , there telling me mud messed up my right front wheel ??? I feel like Toyota has to fix that , I mean how did get in there , does that ...

    2016 Toyota Tacoma Access Cab I4 SR5

    -

    Maintenance & Repair

  • Vibration - 1995 Toyota Tacoma 1 answer

    I have a 1995 automatic Toyota Tacoma. It has always had a very mild vibration, but recently it has worsened. It vibrates really bad while stopped in drive at stop lights. If I put it in Neutral ...

    1995 Toyota Tacoma

    -

    Maintenance & Repair

Tacoma

Looking for a Used Tacoma in your area?

CarGurus has 43,037 nationwide Tacoma listings starting at $1,995.

ZIP:

Search Toyota Tacoma Questions

Toyota Tacoma Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,040
#2 genxer36
genxer36
Reputation 340
#3 BURT100
BURT100
Reputation 330
View All

Related Models For Sale

Used Toyota Tundra
461 Great Deals out of 34,661 listings starting at $2,500
Used Ford F-150
2,144 Great Deals out of 195,014 listings starting at $290
Used Nissan Frontier
326 Great Deals out of 21,087 listings starting at $1,250
Used Chevrolet Silverado 1500
1,911 Great Deals out of 182,352 listings starting at $1,595
Used Toyota 4Runner
229 Great Deals out of 19,027 listings starting at $2,195
Used GMC Sierra 1500
779 Great Deals out of 68,588 listings starting at $1,800
Used Ford Ranger
172 Great Deals out of 5,623 listings starting at $1,200
Used Jeep Wrangler
254 Great Deals out of 15,874 listings starting at $2,695
Used Dodge Ram 1500
390 Great Deals out of 10,840 listings starting at $1,000

Used Cars For Sale

2017 Toyota Tacoma For Sale
14 Great Deals out of 25,684 listings starting at $14,995
2016 Toyota Tacoma For Sale
70 Great Deals out of 2,675 listings starting at $16,990
2015 Toyota Tacoma For Sale
66 Great Deals out of 3,005 listings starting at $13,995
2014 Toyota Tacoma For Sale
49 Great Deals out of 1,937 listings starting at $8,850
2013 Toyota Tacoma For Sale
56 Great Deals out of 2,044 listings starting at $6,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.