Previous Thread
Next Thread
New Reply
Print Thread
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 19, 10:10pm - #330814 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
Need advice with diagnostics code P0171

I have a completely stock 2000 Celica GT. The CEL recently came on with error code P0171, which means the front O2 sensor is indicating a lean mixture. Coincindentaly, this happended about two days after I got it back from the dealership to have a brand new transmission and clutch installed (which feels great now...but that's another story).

I cleaned the MAFS, throttle body, and visually inspected any vacuum hoses I could without taking anything apart (Cleaning the MAFS really smoothed the idle and quickened accelerator response). I reset the ECU, but the CEL came back shortly.

I then took it back to the dealer who did the transmission work, who said that it is running lean, but only at idle, and that the O2 sensors and MAFS are fine. They think it's an "Intake leak", which I assume could include vacuum hoses, Intake manifold, etc.

Any suggestions would be great before I give it back to the dealer to inspect for a day or more.
Joined: May 2002
Posts: 6,007
isaac
ECelica Admin
isaac Nov 19, 10:12pm - #330815 
2001 Absolutely Red Toyota Celica GT
ECelica Admin
2001 Toyota Celica GT

Joined: May 2002
Posts: 6,007
Los Angeles, CA
What did THEY suggest to fix the "Intake leak" THEY think it is ?

[Linked Image]
It's not just your imagination...
Your day really does go by twice as fast while on EverythingCelica.com
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 20, 12:08am - #330816 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
Nothing yet. They said they would need me to leave it a day to diagnose exactly where the leak might be. They had already spent half the day with my car just to tell me this.
Joined: Nov 2004
Posts: 236
Haggard
Member
Haggard Nov 20, 12:10am - #330817 

Member
2000 Toyota Celica

Joined: Nov 2004
Posts: 236
San Antonio Texas
Hey Matt, how muc did you pay to have ur clutch and tranny replaced?

2000 Celica GT-S Spectra White

Current mods:
Magnaflow Cat-back Exhaust

Currently saving for custom turbo....MUST BE F/I!!!!!
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 20, 12:12am - #330818 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
Well, I got them to "throw-in" an oil change, coolant flush, new spark plugs, and a new rear main engine oil seal with the new (not rebuilt) tranny and clutch for $3400. I definitely paid dealer prices, but I wanted someone to complain to when something goes wrong. The tranny has a 1-year, unlimited miles warranty.
Joined: Nov 2004
Posts: 236
Haggard
Member
Haggard Nov 20, 12:14am - #330819 

Member
2000 Toyota Celica

Joined: Nov 2004
Posts: 236
San Antonio Texas
Nice...Im getting my shit done as we speak...
im paying 3850 for the 60k mile service, a new tranny and cluth replacement...and brake job...

its good to hear what someone else paid for it...

it drives nice tho?

2000 Celica GT-S Spectra White

Current mods:
Magnaflow Cat-back Exhaust

Currently saving for custom turbo....MUST BE F/I!!!!!
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 20, 12:17am - #330820 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
The tranny and clutch are great...very smooth. You forget how nice it felt new over time. Of course, I apparently had a countershaft bearing failing, so it was a little rougher than it should have been for quite some time before it finally blew apart...leaving me with a lot of missing teeth.
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 20, 12:19am - #330821 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
Haggard -

You might want to have them do the rear oil seal if it's not too late. It's a cheap part they have to take off anyway, and it would be 500 bucks later if it fails.
Joined: Nov 2004
Posts: 236
Haggard
Member
Haggard Nov 20, 12:20am - #330822 

Member
2000 Toyota Celica

Joined: Nov 2004
Posts: 236
San Antonio Texas
shit, my synchros had issues for a while...and they eventually allowed my tranny to destroy itself...oh well...im glad to hear it drives well tho...it was f'd up when i bought it, so i dunno what a good trany costs...ha ha ha...shit happens...

2000 Celica GT-S Spectra White

Current mods:
Magnaflow Cat-back Exhaust

Currently saving for custom turbo....MUST BE F/I!!!!!
Joined: Nov 2004
Posts: 236
Haggard
Member
Haggard Nov 20, 12:20am - #330823 

Member
2000 Toyota Celica

Joined: Nov 2004
Posts: 236
San Antonio Texas
whats that? i think they may be doing it already...

2000 Celica GT-S Spectra White

Current mods:
Magnaflow Cat-back Exhaust

Currently saving for custom turbo....MUST BE F/I!!!!!
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 20, 12:33am - #330824 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
The seal they used is part# 90311-76001. Honestly, I'm not sure where exactly it sits, but another mechanic friend told me to have them do this.
Joined: Nov 2004
Posts: 236
Haggard
Member
Haggard Nov 20, 12:34am - #330825 

Member
2000 Toyota Celica

Joined: Nov 2004
Posts: 236
San Antonio Texas
alright, cool man, thanks for the advice...

2000 Celica GT-S Spectra White

Current mods:
Magnaflow Cat-back Exhaust

Currently saving for custom turbo....MUST BE F/I!!!!!
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 21, 9:22pm - #330826 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
waveI'm hoping someone has some insight on my original post (above) regarding my engine running lean. Any advice would be appreciated.
Joined: Oct 2002
Posts: 1,233
EuRoBoYGT
black & blue 4 you
EuRoBoYGT Nov 21, 10:30pm - #330827 

black & blue 4 you
2000 Toyota Celica GT

Joined: Oct 2002
Posts: 1,233
El Paso, TX
i have the same problem but it's my O2 senor that got shorted out...

i have a lot of electrical problems in my car.

[Linked Image]
i've been changing but you'll never see me now
now i'm blaming you for everything
Joined: Nov 2004
Posts: 12
Matt007
Member
Matt007 Nov 21, 11:05pm - #330828 
2000 Silver Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Nov 2004
Posts: 12
Maryland
The dealership says the O2 sensors are OK. The wiring looks OK - no visible shorting.
Join the conversation - Register now or Sign in to add your comment


Moderated by  isaac 

Customize Your Toyota CelicaPrivacy Policy · About · Contact
CelicaHobby.com is an independent Toyota Celica enthusiast website. CelicaHobby.com is not sponsored by or affiliated with Toyota Motor Sales, USA, Inc. in any way. The Toyota and Celica names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.
© CelicaHobby.com, 2001-2016