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P0171 and p0174 change everything still same codes. P0171
p0171 and p0174 change everything still same codes. … read more
Alex
Alex
ASE Certified Technician
Associate Degree
1,276 satisfied customers
Im having an issue with this 2013 silverado 1500 5.3. Its
Hey mike im having an issue with this 2013 silverado 1500 5.3. Its throwing P0172 P0175 too rich codes its not telling me much other than a restricted air filter and possibly a fuel regulator? The air… read more
Michael Solis
Michael Solis
618 satisfied customers
I have a 2013 Chevrolet 2500 HD with a 6.0. I keep getting
Good morning I have a 2013 Chevrolet 2500 HD with a 6.0. I keep getting intermittent codes P0101, P0174, and a P0171. I have replaced the maf sensor, had a smoke test performed, no leaks detected, has… read more
Chris (aka- Moose)
Chris (aka- Moose)
Vocational, Technical or Trade School
57,737 satisfied customers
Have a 2007 chevy cobalt 2.2L manual transmission. Had P0121
have a 2007 chevy cobalt 2.2L manual transmission. Had P0121 fault code. Check MAF,MAP, vacuum leaks, throttle body, check scan data on TPS and APP they appear to be within spec. Vehicle came in with … read more
camerontech
camerontech
20 year experience diagnostic technician
class a
1,169 satisfied customers
P0171. Suspect AIR soleinod. 163k. Occuring for a couple
163k. Occuring for a couple months. Started with reseal of intake. … read more
Dan
Dan
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Vocational, Technical or Trade Scho
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2007 Tahoe 5.3l has an issue with having negative 30 term
2007 Tahoe 5.3l has an issue with having negative 30 long term fuel trim during braking (both banks). I never have positive long term fuel trim values, however they come closer to zero under load and … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,721 satisfied customers
2000 Chev silverado 1500 4.8 automatic. The A.I.R and
2000 Chev silverado 1500 4.8 automatic. The A.I.R and Catalytic monitors will not set. All other monitors have set. Have done the GM drive cycle over a dozen times. Drove the truck over 200 miles. No … read more
Chad Farhat
Chad Farhat
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Associate Degree
7,589 satisfied customers
Bill, 2004 Trailblazer 4.2 FWD, I am a mechanic also but
Idles great, put it in drive, turn air on starts to ratlle like pinging. … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
7,589 satisfied customers
I have a 2005 uplander, I keep on getting the code p0172,
I have a 2005 uplander, I keep on getting the code p0172, MAS is working good 02's new, injectors new, fuel pres good, I donr smell any fuel in evap, if the sensor was sticking open wouldn't that set … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
7,589 satisfied customers
I have 06 Chevy 1/2 tonthat is hard to start when cold. term
Good afternoon. I have 06 Chevy 1/2 ton*****that is hard to start when cold. Long term fuel trim is at -19.5 in both banks. I changed all of the injectors recently. My fuel pressure is 58 when running… read more
Roy
Roy
shop foreman
Associate Degree
5,278 satisfied customers
Chevrolet Equinox LT: We have a 2007 Chevy Equinox FWD with
We have a 2007 Chevy Equinox FWD with the V6 engine. We are receiving a code in the ECM of P0171 fuel trim system lean. Symptom 00. Our problem is intermittent as the MIL comes and goes. Any info rega… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,659 satisfied customers
2005 Chevy cobalt: It ran and drove..spark plugs, air filter and o2
2005 2.2 Chevy Cobalt A few weeks ago I had a 2.2 from a 2005 Chevy cobalt put in my 2003 Saturn vue. It ran and drove perfect for about a week then it through a code: p0172 (running rich). I initiall… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
24,606 satisfied customers
2001 Chevy Camaro: scan tool..ecm..p0171..are these lean mixture codes
I have a 2001 Chevy Camaro Z-28 (LS1) with two problems that began around the same time: 1) moderate detonation on engine load - and scan tool always shows zero degress knock retard (even when I clear… read more
Dan
Dan
High School or GED
2,257 satisfied customers
I have a 2001 chevy prizm with a p0171 code set. Ive been
I have a 2001 chevy prizm with a p0171 code set. I've been montering the short term fuel trim in closed loop position and initally was going up to 15-18%. I cleaned the MAF with throttle body cleaner … read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
engine has high calculated load 29% at idle. map is good. long
engine has high calculated load 29% at idle. map is good. long term fuel 23% at and short fuel trim at -83% on bank 3. Any ideas? TB '02… read more
Dan
Dan
High School or GED
2,257 satisfied customers
2006 Chevy Cobalt LS: 2.2L..who hooked it up to diagnostic scanner
My wife has a 2006 Chevy Cobalt LS with the 2.2L I4. Everytime we try and start and drive the car there is a horrible smell of gas that doesnt go away for hours after you stop driving the car. We took… read more
Jim
Jim
Vocational, Technical or Trade Scho
1,718 satisfied customers
1999 chevy: new fuel pump..fuel pressure..knock senor..misfire at idle
1999 chevy 3500 7.4L long crank time after sits for a few minutes installed new fuel pump to eliviate leak dowm fromm check vale fuel pressure immediately jumps to 60 psi on ign. cycle then slowly goe… read more
LEE
LEE
High School or GED
28 satisfied customers
Chevy cavalier: I START IT UP IT IDLES UP THEN ACTS LIKE IT WANTS
I HAVE A 03 CHEV CAVELIER. WHEN I START IT UP IT IDLES UP THEN ACTS LIKE IT WANTS TO STALL. ALMOST LIKE ITS LOADING UP WITH FUEL. ONCE IT IS WARM IT STARTS FINE. IT HAS A HESITATION WHEN DRIVING SOMET… read more
goodwrench9124
goodwrench9124
Lead Tech/ Shop Leader
Vocational, Technical or Trade Scho
3,392 satisfied customers
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