Running lean
Asked by Joshiesmommy2008 Mar 18, 2016 at 04:17 AM about the 2000 Chevrolet Blazer 4 Door LT 4WD
Question type: Maintenance & Repair
Okay so I drive a 2000 chevy blazer. I just replaced
my o2 sensors because I went to auto zone
because my check engine light was on & it said
replace o2 sensor in bank one and two so we did.
Now the check engine light is back on saying my
engine is running to lean. Code P0171 but my
engine seems like it's running better. I'm so lost
can anyone give me any ideas?
2 Answers
tennisshoes answered about a year ago
Have you changed the fuel filter? When was the last fuel injector service? If light still comes on after that is done, run a fuel pressure test, pressure might be low.
Rowefast answered about a year ago
You may have a intake or vacuum leak somewhere. Make sure the intake is snugged up and check the throttle body base gasket, & all vacuum lines. This is more info on the code....P0171 CHEVROLET - Fuel Trim System Lean Bank 1... Possible causes... - Intake air leaks - Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Lack of fuel - Faulty Mass Air Flow (MAF) sensor - Incorrect Positive Crankcase Ventilation (PCV) hose connection... Some Tech notes... If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced. The P0171 code could also be caused may be caused by one or more of the following: debris on MAF sensor causing an incorrect reading, improper oil level, low or high fuel pressure or Engine Control Temperature (ECT) Sensor reading inaccurate.... There is a service bulletin on this you may want to look up...http://goo.gl/ZOB29 - or - 2000-2008 Chevrolet Factory Service Bulletin OBDII Code P0171
Your Answer
Related Questions
-
Running lean 2 answers
Okay so I drive a 2000 chevy blazer. I just replaced my o2 sensors because I went to auto zone because my check engine light was on & it said replace o2 sensor in bank one and two so we did. Now t...
2000 Chevrolet Blazer 4 Door LT 4WD
-
Maintenance & Repair
-
running lean 5 answers
Lately my truck has been showing service engin soon light, I hokked up a code reader and it says it is running lean on bank 1, so, I did a real time data check while driving it and noticed the O2 sens...
2001 Chevrolet Silverado 1500 LT Extended Cab SB 4WD
-
Maintenance & Repair
-
Running hot 1 answer
Hi, my NAME is SidneyNewsome. I changed the water pump and the thermostat even though it doesn't run hot in Park for long periods maybe an hour or so . but while driving it . it's start to go up ...
2005 Chevrolet Blazer 4 Door LS
-
Maintenance & Repair
-
driverside running light 2 answers
in the day when the sun is out my drivers side running light does not come on,but at night it does why?
2004 Chevrolet Blazer 2 Door LS 4WD
-
Maintenance & Repair
-
2001 4.3 chevy blazer running rough 1 answer
towing an empty trailer for a friend. ive towed the same trailer loaded down no problem. ok, on the highway allof a sudden i heard something crack and fall off the front of the car passenger side it...
2001 Chevrolet Blazer 2 Door LS
-
Maintenance & Repair
Shortcuts
Search Chevrolet Blazer Questions
Chevrolet Blazer Experts
| #1 |
|
Andrew Olsen
Reputation
1,990
|
| #2 |
|
yetilikesbeer
Reputation
1,300
|
| #3 |
|
Rowefast
Reputation
1,030
|
Related Models For Sale
Used Cars For Sale
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.