dtc P0121 TPS circuit malf. - Suzuki Forums: Suzuki Forum Site
Suzuki Forum Suzuki Forums

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   Suzuki Forums: Suzuki Forum Site > Suzuki Models > Suzuki Sidekick, Escudo, Vitara & Geo Tracker Forum (1989-1998)
Register Home Forum Active Topics Photo Gallery Garage Search Today's Posts Mark Forums Read Auto EscrowAuto LoansInsurance

Suzuki-Forums.com is the premier Suzuki Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 01-11-2010, 03:44 PM   #1 (permalink)
Member
 
Join Date: Jan 2009
Posts: 28
Gallery: 0
Suzukinoob is on a distinguished road
Default dtc P0121 TPS circuit malf.

got a 2002 Vitara 2.0 L , and have dtc p0121 TPS circuit malf.


i disconnect the maf sensor and it runs fine, with the maf connected it blows black smoke, doesn't idle, runs rough.


If i connect the MAF it dies.

is there any way to test the maf?


or is this a common thing?

BTW there is a dtc for a bad maf altho it isn't coming up on my scanner
Suzukinoob is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-12-2010, 07:57 AM   #2 (permalink)
Bex
Veteran
 
Bex's Avatar
 
Join Date: Mar 2008
Location: Ireland
Posts: 15,994
Gallery: 0
Bex is on a distinguished road
Default

Unfortunately, on the 'side of the wall' we only deal with the cars from 89-98. As yours is 2002, you should post on the other side with the newer cars. That being said, our wonderful kick-fix pages does have a section for testing the MAF:
Howto-test-a-MAF
Again, this is for the older cars, and I don't know if its applicable to your car.
__________________
'91 Tracker 8V, 1.6L, 5 sp, 4wd, 2dr, conv, CAMI, horribly rusty
'97 Suzuki Vitara 8v, 1.6L 5 sp, 4wd, 2dr, tintop, horribly purple
'61 NSU Quickly - 150mpg
Bex is offline   Reply With Quote Quick reply to this message
Old 01-12-2010, 02:45 PM   #3 (permalink)
Banned
 
Join Date: Aug 2009
Location: Peru in the winter USA.
Posts: 11,360
Gallery: 0
kick_fix is on a distinguished road
Default

your post is confusing. mixing maf 2 times.

TP Circuit Performance Problem

TPS malf.

if you unplug any sensor the ecu goes to limphome and mimic mode.
it will run rich but will run. after all better to have transportation than a brick.


the ECU does compare MAF out put to TPS and load.
and can in fact report the wrong one.

your problem is a cake walk, connect scantool and just look.
nothing more need be done.
certainly spending $1000 guessing.

scan it.
kick_fix is offline   Reply With Quote Quick reply to this message
Old 01-12-2010, 02:49 PM   #4 (permalink)
Banned
 
Join Date: Aug 2009
Location: Peru in the winter USA.
Posts: 11,360
Gallery: 0
kick_fix is on a distinguished road
Default

depending on whats wrong ,unplugging something can make it run better.

eg: if MAF is reading low all the time (AFR is lean) "wrong" and you unplug it.
sure richer from super lean is better.
but not right.

plug in the scan tool see what MAF , o2 and TPS are really doing.

this can also be totally unrelated.
gross air leaks, slipped timing belt or chain as approp.
just because TPS monitor malf's , i can be lots of things.

on all obb2 cars, you need to look at pending codes too. never ever forget that.
check compression and vacuum on all cars malfing,to besure motor is viable.

no ecu can operated a dead motor. none. (well, not correctly and proper)
kick_fix is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Suzuki Forums: Suzuki Forum Site > Suzuki Models > Suzuki Sidekick, Escudo, Vitara & Geo Tracker Forum (1989-1998)

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Suzuki Forums: Suzuki Forum Site forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 11:37 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.