YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 95.5-2004 Tacomas & 96-2002 4Runners
Sign in using an external account
Register Forgot Password?
Search


95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 08-19-2008, 06:20 PM   #1 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Aug 2008
Posts: 7
Check Engine Light Code P1135 (Air Fuel Sensor)

2002 4Runner SR5, V6, 85410 miles
This is my first Check Engine issue with the truck since I bought it in October 2004. Three dash lights (Check Engine Light, VSC and TRAC OFF lights) all lit up at once (on Aug 09, 2008).
Checked battery voltage, cleaned battery posts, and gas cap was tight. Code got erased when I disconnected the battery cables, but after driving 12 miles the Check Engine Light, VSC and TRAC OFF lights lit up again. Got the truck diagnosed. Got code P1135 (Manufacturer Control Fuel Air Metering). Replaced the air fuel sensor (DENSO p/n 89467-35011). I did not erase the codes after installing the new air fuel sensor. Instead, I drove the truck (about 30 miles) and hoped the lights would turn off by themselves, but they didn't turn off that day. The next day, I start the truck and notice the Check Engine Light, VSC and TRAC OFF lights were are all gone (off). (Cooool...I never knew that codes got cleared on their own after replacing the correct part. Now, I am sure the old air fuel sensor had gone bad.)
FYI: I read in one of the 4Runner forums that the heating element resistance on a good sensor should be between 0.8 - 1.4 Ohms at 68F. The heating element resistance is measured between the two black wires on the air fuel sensor. I checked the resistance (with a Fluke digital multimeter) on the old (bad) air fuel sensor and got a value of 2.3 Ohms at 78F. The resistance was 1.1 Ohms on the new air fuel sensor at 78F (within the range, good sensor).
Since installing the new air fuel sensor, I have noticed that the truck does not leave the strong exhaust odor (that it used to) during startup and power during acceleration has improved. I'm sure miles per gallon has improved ,but I haven't taken a measurement yet. In my opinion, I think it is a good idea to change the air fuel sensor sometime after 75K, since it helps the overall performance of the truck so much and prevents possible damage to the catalytic converters (very expensive parts). Also, the air fuel sensor was easy to reach and replace. Good luck and Thanks to members of the forums whose posts on this issue were so helpful.
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
Chico6 is offline   Reply With Quote
Old 08-19-2008, 07:47 PM   #2 (permalink)
Registered User
Personal Sales Rating: (0)
 
BigBallsMcFalls's Avatar
 
Join Date: Apr 2008
Posts: 847
take note

your rear o2 sensor will now, likely puke out in 4 months it is almost a guarantee.

so get
ready to replace it. these things wear out normally in pairs, kinda like a pair of new headlight bulbs. and when the a/f is on the fritz, it accelerates the death of the rear.

also your Denso part number is a Toyota specific part number

you will remove p/n 89467-35010 ...35011 is an upgraded version, so don't worry
when a dealer gives you 35011 it is the correct part ...a/f for 3.4 engine

Last edited by BigBallsMcFalls; 08-19-2008 at 07:50 PM.
BigBallsMcFalls is offline   Reply With Quote
Old 08-20-2008, 08:22 AM   #3 (permalink)
Contributing Member
Personal Sales Rating: (0)
 
eric-the-red's Avatar
 
Join Date: Oct 2003
Location: Port Coquitlam, BC
Posts: 2,593
Quote:
Originally Posted by Chico6 View Post
I'm sure miles per gallon has improved ,but I haven't taken a measurement yet.
I just replaced the sensor on my 01, with 150,000 km on it, in May after getting the P1135 code, . I'm now getting 450 km per tank compared to about 380 km before replacing it. The gas savings should pay for the new sensor fairly quickly.
eric-the-red is offline   Reply With Quote
Old 09-02-2008, 04:18 PM   #4 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Oct 2005
Posts: 25
3.4 swap

Just finished up my 3.4 swap, and am getting, a P1135 code also. For the air fuel sensor I just reused the old sensor from the 3.0, The engine harness that came with the engine had a shattered connector shell for the 3.4 sensor, which actually is a different style connector shell. So i had another older 3.4 harness that had the same style connector as the 3.0 so I just spliced that one in. are the 2 sensors different? or is the one that I used just a bad one?

Thanks
Late
Joe
__________________
Better to have it and not need it, then need it and not have it.
There are only 3 kinds of people in the world, those who can count and those who can't.
TOYJOETA is offline   Reply With Quote
Old 09-04-2008, 02:20 PM   #5 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Oct 2005
Posts: 25
Well i tested the A/F sensor and it was bad so I had another one laying around so I swapped it in and I'm still getting the same code? is there a difference between the two sensors?
__________________
Better to have it and not need it, then need it and not have it.
There are only 3 kinds of people in the world, those who can count and those who can't.
TOYJOETA is offline   Reply With Quote
Old 09-04-2008, 03:15 PM   #6 (permalink)
Contributing Member
Personal Sales Rating: (0)
 
mt_goat's Avatar
 
Join Date: Nov 2002
Location: Oklahoma State
Posts: 10,665
Yes there is a difference between the A/F sensor and the older style O2 sensors. What year and model ECU are you using?
__________________
93 4X4 ext-cab, auto, SR5, 3.4 V6, supercharged, 2.1" pulley, URD fuel mods, Aquamist WI, IPT valve body mod, dual cases, 4" superlift front, Alcan springs rear, 33 BFG KM2, ARB locked front & rear, 5.29 US Gears, RB 1" Body Lift, TJM T-17, Warn m8000.
mt_goat is offline   Reply With Quote
Old 09-04-2008, 07:25 PM   #7 (permalink)
Registered User
Personal Sales Rating: (0)
 
BigBallsMcFalls's Avatar
 
Join Date: Apr 2008
Posts: 847
Quote:
Originally Posted by TOYJOETA View Post
Well i tested the A/F sensor and it was bad so I had another one laying around so I swapped it in and I'm still getting the same code? is there a difference between the two sensors?
if you have to ask, I am guessing you didn't test an Air Fuel sensor correctly.

to test one you need a computer hooked up to the diagnostic port
and monitor the waveform. an a/f sensor function is untestable without
the ECU interpreting for you.

you can only test the heater circuit and
voltage of .64 or .65 without using a computer, and that is garbage
doesn't tell you if it really works or not.

a/f is not like an o2 sensor that you can easily test with a multimeter
BigBallsMcFalls is offline   Reply With Quote
Old 09-08-2008, 02:27 PM   #8 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Oct 2005
Posts: 25
Quote:
Originally Posted by mt_goat View Post
Yes there is a difference between the A/F sensor and the older style O2 sensors. What year and model ECU are you using?
The ECU is from an 02' tacoma manual trans.

I get that I need a computer to see if the sensor is working, but thats not the code I'm getting, the code is for the heater circuit. I pulled the connector and hooked up my multi meter and am getting 13V at the connector so it must have to do with the difference between the newer and older style sensors, I think?
__________________
Better to have it and not need it, then need it and not have it.
There are only 3 kinds of people in the world, those who can count and those who can't.
TOYJOETA is offline   Reply With Quote
Old 09-08-2008, 05:50 PM   #9 (permalink)
Contributing Member
Personal Sales Rating: (0)
 
mt_goat's Avatar
 
Join Date: Nov 2002
Location: Oklahoma State
Posts: 10,665
Quote:
Originally Posted by TOYJOETA View Post
The ECU is from an 02' tacoma manual trans.

I get that I need a computer to see if the sensor is working, but thats not the code I'm getting, the code is for the heater circuit. I pulled the connector and hooked up my multi meter and am getting 13V at the connector so it must have to do with the difference between the newer and older style sensors, I think?
The 02 Taco definitely takes the A/F sensor for the front.
__________________
93 4X4 ext-cab, auto, SR5, 3.4 V6, supercharged, 2.1" pulley, URD fuel mods, Aquamist WI, IPT valve body mod, dual cases, 4" superlift front, Alcan springs rear, 33 BFG KM2, ARB locked front & rear, 5.29 US Gears, RB 1" Body Lift, TJM T-17, Warn m8000.

Last edited by mt_goat; 09-08-2008 at 05:51 PM.
mt_goat is offline   Reply With Quote
Old 09-09-2008, 05:14 AM   #10 (permalink)
Registered User
Personal Sales Rating: (0)
 
BigBallsMcFalls's Avatar
 
Join Date: Apr 2008
Posts: 847
yeah it's not just cali spec anymore

at '02 forward all of them have a/f's
BigBallsMcFalls is offline   Reply With Quote
Old 09-09-2008, 04:52 PM   #11 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Oct 2005
Posts: 25
Quote:
Originally Posted by BigBallsMcFalls View Post
yeah it's not just cali spec anymore

at '02 forward all of them have a/f's
that blows, I just priced one at toyota and...$213.00 thats so diculous it ridiculous.
__________________
Better to have it and not need it, then need it and not have it.
There are only 3 kinds of people in the world, those who can count and those who can't.
TOYJOETA is offline   Reply With Quote
Old 09-09-2008, 05:06 PM   #12 (permalink)
Contributing Member
Personal Sales Rating: (0)
 
mt_goat's Avatar
 
Join Date: Nov 2002
Location: Oklahoma State
Posts: 10,665
Try here, $149:
https://www.1sttoyotaparts.com/partscat.html
__________________
93 4X4 ext-cab, auto, SR5, 3.4 V6, supercharged, 2.1" pulley, URD fuel mods, Aquamist WI, IPT valve body mod, dual cases, 4" superlift front, Alcan springs rear, 33 BFG KM2, ARB locked front & rear, 5.29 US Gears, RB 1" Body Lift, TJM T-17, Warn m8000.
mt_goat is offline   Reply With Quote
Old 10-18-2012, 04:45 PM   #13 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Oct 2012
Posts: 3
So, 400 miles after I bought an 02 Tacoma, I got the check engine light (trucks got 120K on it). Tested it, and sure enough it was the air fuel sensor, after reading some of the comments on here, I went ahead and bought it from amazon for about 140 bones. The same day that I ordered it, the light went out on its on and hasn't came back on for the past week. Go ahead and replace it, or just keep it on a shelf for when I get the light again? Thanks-
hwkav8r is offline   Reply With Quote
Old 10-18-2012, 06:13 PM   #14 (permalink)
Registered User
Personal Sales Rating: (0)
 
TheDurk's Avatar
 
Join Date: Feb 2007
Location: New Jersey and Sao Paulo
Posts: 869
Quote:
Originally Posted by BigBallsMcFalls View Post
yeah it's not just cali spec anymore

at '02 forward all of them have a/f's
'01 forward on 4Runners. Cali's only existed in '99 and 2000.
__________________
'99 "tall" 4Runner SR5 5sp 4WD 3.4 V6(U.S)--no boards, Hella Fogs, Trekmaster shocks, FIAMM horns, Alpine sound, stock otherwise, owned since new.
'97 HiLux SW4 (Japan model assembled in Argentina, bought in Brazil, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)

Last edited by TheDurk; 10-18-2012 at 06:21 PM.
TheDurk is offline   Reply With Quote
Old 10-18-2012, 06:25 PM   #15 (permalink)
Registered User
Personal Sales Rating: (0)
 
TheDurk's Avatar
 
Join Date: Feb 2007
Location: New Jersey and Sao Paulo
Posts: 869
Quote:
Originally Posted by hwkav8r View Post
So, 400 miles after I bought an 02 Tacoma, I got the check engine light (trucks got 120K on it). Tested it, and sure enough it was the air fuel sensor, after reading some of the comments on here, I went ahead and bought it from amazon for about 140 bones. The same day that I ordered it, the light went out on its on and hasn't came back on for the past week. Go ahead and replace it, or just keep it on a shelf for when I get the light again? Thanks-
At 120k, it probably slow and giving you suboptimal mileage and it's end-of-life anyway. However, if it's a heater code, I'd probably wait a while to see if it came back. Then I'd be sure the problem was in the sensor if it cured it. If it's an out-of-range signal, I'd just change it. What was the code?
__________________
'99 "tall" 4Runner SR5 5sp 4WD 3.4 V6(U.S)--no boards, Hella Fogs, Trekmaster shocks, FIAMM horns, Alpine sound, stock otherwise, owned since new.
'97 HiLux SW4 (Japan model assembled in Argentina, bought in Brazil, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)
TheDurk is offline   Reply With Quote
Old 10-18-2012, 06:34 PM   #16 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Oct 2012
Posts: 3
Thanks for the reply, it gave a P1135 "air fuel sensor heater circuit malfunction". I'm getting 18.75 to 19 mpg based on the last 500 miles.
hwkav8r is offline   Reply With Quote
Old 10-21-2012, 08:24 PM   #17 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Oct 2012
Posts: 3
It came back, it would come on every other time I'd start it. I changed it out this afternoon. Real curious to see whether it increases fuel mileage.
hwkav8r is offline   Reply With Quote
Old 10-21-2012, 08:24 PM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
02, 8946735011, air, check, code, control, denso, engine, fuel, lights, manufacturer, metering, p1135, pn, runner, trac, vsc

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Check Engine, Code says Knock Sensor.... My954Runner 95.5-2004 Tacomas & 96-2002 4Runners 24 06-23-2012 01:54 PM
Check Engine Light code 25 ReneB64 86-95 Trucks & 4Runners 21 06-16-2008 08:40 AM
check engine light help no code id stevec8720 86-95 Trucks & 4Runners 11 01-24-2008 03:55 PM
Check Engine Light Was On...Now Off...I've Got the Code... LSUMatt1514 95.5-2004 Tacomas & 96-2002 4Runners 12 05-04-2006 12:03 PM
Check engine light code help!!!! mattk 95.5-2004 Tacomas & 96-2002 4Runners 2 03-23-2004 06:21 PM


All times are GMT -8. The time now is 12:48 AM.


2010 InternetBrands, Inc.