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

228,355

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.

228,355

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

  • OBD for 95.5 Tacoma 2 answers

    I have a '95.5 Tacoma (V-6) that was built with a "OBD II connection" under the dash. The emissions sticker does not read "OBD II certified". I want to buy an OBD reader but the tech rep at Equis told...

    1995 Toyota Tacoma

    -

    Maintenance & Repair

  • my 2001 toyota tacoma wont start,battery 2 yrs old.How do I know if its the Alternator, battery or something else? 3 answers

    Tacoma Prerunner wont start...

    2001 Toyota Tacoma

    -

    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

  • how to change the tps on a 2001 tacoma 1 answer

    i put a new tps on my 2001 tacoma 6 cylinder and now it does not shift properly check light came back on after a few miles

    2001 Toyota Tacoma 4 Dr Prerunner V6 Crew Cab SB

    -

    Maintenance & Repair

Tacoma

Looking for a Used Tacoma in your area?

CarGurus has 38,152 nationwide Tacoma listings starting at $2,900.

ZIP:

Search Toyota Tacoma Questions

Toyota Tacoma Experts

#1 Tom Demyan
Tom Demyan
Reputation 960
#2 FordNut
FordNut
Reputation 920
#3 genxer36
genxer36
Reputation 330
View All

Related Models For Sale

Used Toyota Tundra
532 Great Deals out of 32,465 listings starting at $2,995
Used Nissan Frontier
392 Great Deals out of 26,170 listings starting at $890
Used Ford F-150
2,431 Great Deals out of 211,450 listings starting at $895
Used Chevrolet Silverado 1500
2,016 Great Deals out of 160,759 listings starting at $1,995
Used Toyota 4Runner
292 Great Deals out of 20,775 listings starting at $2,700
Used GMC Sierra 1500
880 Great Deals out of 64,789 listings starting at $1,500
Used Ford Ranger
178 Great Deals out of 6,228 listings starting at $1,300
Used Jeep Wrangler
291 Great Deals out of 19,181 listings starting at $3,295
Used Dodge Ram 1500
453 Great Deals out of 11,501 listings starting at $700
Used Toyota Camry
871 Great Deals out of 92,511 listings starting at $1,300
Used Toyota RAV4
598 Great Deals out of 66,773 listings starting at $999

Used Cars For Sale

2017 Toyota Tacoma For Sale
7 Great Deals out of 20,629 listings starting at $22,643
2016 Toyota Tacoma For Sale
78 Great Deals out of 2,447 listings starting at $20,588
2015 Toyota Tacoma For Sale
54 Great Deals out of 2,803 listings starting at $13,774
2014 Toyota Tacoma For Sale
55 Great Deals out of 2,025 listings starting at $10,974
2013 Toyota Tacoma For Sale
59 Great Deals out of 2,078 listings starting at $8,999