P0171 - updated, new problems, need help!
#1
P0171 - updated, new problems, need help!
P0171 - System too Lean - Bank 1
i tripped this code just putting around town this morning, and my VSC, Trac Off, and Check Engine lights popped on after i noticed the idle fluctuating and the past few stop lights in town, it still runs and drives normally... any ideas?
see my mods in my profile, it's on the '05 BOP.
i tripped this code just putting around town this morning, and my VSC, Trac Off, and Check Engine lights popped on after i noticed the idle fluctuating and the past few stop lights in town, it still runs and drives normally... any ideas?
see my mods in my profile, it's on the '05 BOP.
#5
cleaned the maf, and re-set the ecu, i found the problem, the intake pipe popped off the throttle body, but now i have a new problem... in both neutral and any foward gear, it hiccups and burps and bucks between 2000 and 4500 RPM, then pulls normally up to redline, no check engine light, and it idles normally, all the vacuum hoses are good, and the exhaust is all how it's supposed to be, also i notice the exhaust smells lean as hell.
any thoughts?
any thoughts?
#7
You said you found the problem , the intake fell off.
You might want to check the piece of hose that connects the intake to the TB , might be damaged
your stumbling can be caused by a fouled injector , could cause a lean condition or a vacuum leak down stream of the MAF sensor ( mounting hose on the intake @ the TB)
Or , worse case , Your MAF was fried during this problem/repair.
The MAF sensor gets real hot during operation and having the intake fall off may have caused damage to it . If it got hot enough it could melt the silicone that the MAF components are sealed with and fouling it , causing it to run lean still.
You might want to check the piece of hose that connects the intake to the TB , might be damaged
your stumbling can be caused by a fouled injector , could cause a lean condition or a vacuum leak down stream of the MAF sensor ( mounting hose on the intake @ the TB)
Or , worse case , Your MAF was fried during this problem/repair.
The MAF sensor gets real hot during operation and having the intake fall off may have caused damage to it . If it got hot enough it could melt the silicone that the MAF components are sealed with and fouling it , causing it to run lean still.
#8
try disconnecting the battery for a couple minutes then re connecting it. Also could be a bad first 02 sensor causing it to run lean. If it was an injector it would misfire. Could aslo be a bad maf. Both are hard to tell unless you have a scan tool to read the voltages.
#9
Originally Posted by Tannerb
try disconnecting the battery for a couple minutes then re connecting it. Also could be a bad first 02 sensor causing it to run lean. If it was an injector it would misfire. Could aslo be a bad maf. Both are hard to tell unless you have a scan tool to read the voltages.
sounds like a misfire to me
#14
Senior Member
Fail, INC
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Join Date: May 2005
Location: Nice little room with padded walls
Posts: 9,975
Hmmmm... This might be causing my car to be screwy...
first its lean then rich then lean... I was thinking it was my emanage but its still doing it n/a...
How did you eventually figure out what the dealio was?
first its lean then rich then lean... I was thinking it was my emanage but its still doing it n/a...
How did you eventually figure out what the dealio was?
#15
it sat for 8 months till i finally took the stupid thing to the toyota dealer... and after a month, they replaced the TPS and told me to just get my stupid car out of their service department.
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