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C.E.L.=System too Lean? #197975 Jun 12, 8:43am Jun 12, 8:43am
Joined: Oct 2003
Posts: 60
Midwest City, Oklahoma
2000 Red Toyota Celica IcE_Z OP
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Joined: Oct 2003
Posts: 60
Midwest City, Oklahoma
C.E.L.=System too Lean?
went to Autozone today...had them check out what my CEL was saying and i got this...

PO171
System Too Lean
Bank #1

i asked the guy at autozone what does that mean...he said he didnt know...so im posting this here and my OK-website...any help would be appreciative

Re: C.E.L.=System too Lean? [Re: IcE_Z] #197976 Jun 12, 9:00am Jun 12, 9:00am
Joined: Apr 2003
Posts: 1,917
Southern California
tru_Asiatik_Pride
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2003 Toyota Celica
tru_Asiatik_Pride

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heres what the code means--> web page
someoene else might know how to fix the problems

Re: C.E.L.=System too Lean? [Re: tru_Asiatik_Pride] #197977 Jun 12, 12:24pm Jun 12, 12:24pm
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California
2000 Silver Toyota Celica GT silver
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silver
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California
Clean MAF
Reset ECU
Check for Intake leaks

Re: C.E.L.=System too Lean? [Re: silver] #197978 Jun 12, 1:39pm Jun 12, 1:39pm
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Posts: 60
Midwest City, Oklahoma
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Midwest City, Oklahoma
is there a proper way to clean the MAF?

Re: C.E.L.=System too Lean? [Re: IcE_Z] #197979 Jun 12, 1:59pm Jun 12, 1:59pm
Joined: May 2002
Posts: 3,295
Riverside, CA
2001 Spectra Blue Mica Toyota Celica GTS Steven
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Click here for instructions on how to clean your mass air flow sensor (MAFS):

https://www.celicahobby.com/ubbthreads/thread.f_1862388016_0_collapsed_2__1.html

Re: C.E.L.=System too Lean? [Re: Steven] #197980 Jun 12, 2:00pm Jun 12, 2:00pm
Joined: May 2002
Posts: 3,295
Riverside, CA
2001 Spectra Blue Mica Toyota Celica GTS Steven
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after cleaning it, reset your ecu by unbolting and disconnecting the negative terminal on your battery for 5 minutes.

Re: C.E.L.=System too Lean? [Re: tru_Asiatik_Pride] #197981 Jun 12, 2:02pm Jun 12, 2:02pm
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Riverside, CA
2001 Spectra Blue Mica Toyota Celica GTS Steven
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Steven
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Let me know how it goes

Re: C.E.L.=System too Lean? [Re: Steven] #197982 Jun 12, 2:04pm Jun 12, 2:04pm
Joined: Apr 2004
Posts: 162
Kentucky
jenn1356
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2000 Toyota Celica GT
jenn1356

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Kentucky
my car has the P0171 on it too-don't really know why, but I don't think it's gonna hurt anything.

Re: C.E.L.=System too Lean? [Re: jenn1356] #197983 Jun 12, 2:10pm Jun 12, 2:10pm
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2001 Spectra Blue Mica Toyota Celica GTS Steven
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I had the P0171 until i cleaned my mafs and reset my ecu, after that it disappeared. Try it jen

Re: C.E.L.=System too Lean? [Re: Steven] #197984 Jun 12, 2:13pm Jun 12, 2:13pm
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St. George, UT
v3n0m
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Your car will feel completely different after you clean the MAF. Like it has new life.

Re: C.E.L.=System too Lean? [Re: v3n0m] #197985 Jun 12, 2:15pm Jun 12, 2:15pm
Joined: Apr 2004
Posts: 162
Kentucky
jenn1356
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I've cleaned it twice or three times and didn't make any difference. It goes off after I clean it, then comes back on in a day or so.

Re: C.E.L.=System too Lean? [Re: jenn1356] #197986 Jun 12, 2:34pm Jun 12, 2:34pm
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Midwest City, Oklahoma
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thanks steven, i will go do that right now, thanks for the help

Re: C.E.L.=System too Lean? [Re: Steven] #197987 Jun 12, 3:54pm Jun 12, 3:54pm
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Riverside, CA
2001 Spectra Blue Mica Toyota Celica GTS Steven
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Jen there are 2 spots on the MAFS you're supposed to clean, the air temp probe and the little wires in the canal. Here is the air temp probe:
Linked Image

Re: C.E.L.=System too Lean? [Re: Steven] #197988 Jun 12, 3:55pm Jun 12, 3:55pm
Joined: May 2002
Posts: 3,295
Riverside, CA
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Here are the crutial wires that need to be cleaned. These are the ones that are probably really dirty and what caused your check engine light P0171.
Linked Image

Re: C.E.L.=System too Lean? [Re: Steven] #197989 Jun 12, 3:56pm Jun 12, 3:56pm
Joined: May 2002
Posts: 3,295
Riverside, CA
2001 Spectra Blue Mica Toyota Celica GTS Steven
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Jenn - follow this entire set of instructions CAREFULLY
https://www.celicahobby.com/ubbthreads/thread.f_1862388016_0_collapsed_2__1.html

Re: C.E.L.=System too Lean? [Re: Steven] #197990 Jun 12, 4:19pm Jun 12, 4:19pm
Joined: Oct 2003
Posts: 60
Midwest City, Oklahoma
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Midwest City, Oklahoma
it worked...thanx steven...yea its like new...which i bought my car like this and i just thought they were like that...it helped my low end so much...it went from literally no low end to hey...its nice and the transition to lift is not hard any more...it just goes into like it should compared to night and day kickin it...but thanx for the help!!!

Re: C.E.L.=System too Lean? [Re: IcE_Z] #197991 Jun 12, 5:41pm Jun 12, 5:41pm
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Posts: 583
palm springs, burbank CA
Jae
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palm springs, burbank CA
i don't know, i have 2001 gts and had it for about three year. i had clean the MAF, and it wasn't even dirty at all. so i dunno how your MAF gets dirty?

Re: C.E.L.=System too Lean? [Re: Jae] #197992 Jun 12, 5:47pm Jun 12, 5:47pm
Joined: May 2002
Posts: 3,295
Riverside, CA
2001 Spectra Blue Mica Toyota Celica GTS Steven
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Quiet you.

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