Rookie

I have a 2000 4Runner 4wd and I got a CEL the other day.
Took it to the local AutoZone for a free diagnostic and got the following:

P0125 Closed Loop Fuel Control Insufficient
P1135 MFG Control Fuel Air Metering
P1130 MFG Control Air Fuel Metering

I recieved the P0125 a few months ago and cleaned my MAF, reset the code and it hasn't come back.

I reset these codes above and the came back within a mile.

Any help or suggestions would be great.

Rook

midiwall

From the list of Toyota's interpretation of the codes (available from a link in the Tech Writeup section here), we can get more information:P1135 Sounds like the TPS (Throttle Position Sensor) which could be causing P1130.

Rookie

Those code descriptions are so far off you could really mess someone up by posting them.

I just found this page which describes my problem/codes perfectly. Partznet has the O2 Sensor for $108
http://www.4x4wire.com/toyota/4Runner/tech/O2_Sensor/


Rookie

midiwall

Ummm, okay, but look again... That pages talks about the O2 sensor codes which are P0130 & P0135. You posted P1130 & P1135.

Spend that $108 wisely.... and watch out for typos when searching.

calg3

Be careful there, like Midiwall said. Also, URD has really good prices on 02 sensors:

http://www.urdusa.com/product_info.p...07f418cbe81877

Rookie

There is something VERY screwed up here....

NO search shows that P1130 or P1135 mean what you and Dr.Z are saying thos codes mean. Then again - the codes on the O2 Sensor page I posted aren't the ones I have (you got me there)

A quick net search shows these: (http://autorepair.about.com/cs/troub...l_obd_main.htm)
P0130 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

and
P1135 A/F Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1130 A/F Sensor Circuit Range/Performance (Bank 1 Sensor 1)

And I've seen plenty of other sites saying the same

This guys seems to have the exact same problem as me:
http://www.obdii.com/ubb/Forum1/HTML/002422.html
Could the Autozone readers be giving the wrong codes? and adding the 1to the beginning of the code?

I'm guessing Autozone gave me a wrong code, and I should get it checked again by someone else.

Rook

calg3

Almost always a good idea to get a second opinion...

midiwall

I dunno where Galen sourced that list from, I do know that he typed them in many moons ago.

Usually P codes 1000+ are mfg specific, though they tend to follow a trend.

I agree that the consensous on the 'net seems to be that it's an O2 sensor issue... though there does seem to be the outside chance that it's somethng else.

MTL_4runner

P0125 Insufficient Coolant Temp for Closed Loop Fuel Control
P1135 MFG Control Fuel Air Metering
P1130 MFG Control Air Fuel Metering

I could find the first one pretty easily but the other two don't even show up as codes for the 3.4L.
http://aarc.epnet.com/application/93.../93164g43L.gif
http://aarc.epnet.com/application/93.../93164g44L.gif
http://aarc.epnet.com/application/93.../93164g45L.gif

I also tried looking the codes up on my scan tool and it says "vehicle specific, no DTC".
I might have someone else try pulling the codes again to see if you get the same ones.

Read this for code P0125:
http://www.4x4wire.com/toyota/4Runner/tech/O2_Sensor/

Rookie

One of the reasons I believe the Scanner that Autozone used might have meant P0130 and P0135 .

I ordered a scanner from OBD-2.com, I already have a cable and workshop laptop/software for my VW. He sells a version of his software for $62 that works with my existing stuff. So as soon as it comes in - I'll post back the results.

It's the same software that the guy at 4x4wire uses in your link, so I'll be able to diagnose the O2 Sensor directly.

Rook

MTL_4runner

That is exactly how I would tackle it too.

Rookie

BTW - Calg3,
Now that I have that scanner, if you ever need a check, - send me an email. I'm up in WhiteMarsh

Rook

Bob_98SR5

guys,

just a note about galen's obdii code page: https://www.yotatech.com/~corey/tech/dr_z_obd/dr_z.htm

near the bottom of the page, there are toyota-specific trouble codes too

also, the above dialogue sounds like the problem might have been that the wrong code was given to rook or rook might have mistyped it. rook, what did your obdii sensor pull up?

bob

Rookie

I haven't had a chance to check it yet - I had to pay for the software, then download it, install it and then email an Activation code to them, then they email me back a code that makes the program work - I recieved that today, but still haven't had a chance to even see if it will work. Hopefully it will and I can figure out if it's the O2 sensor or TPS.

Rook

calg3

Roger that, Rook. I might just take you up on that. That is where I bought my 4Runner from the CarMax up there...

Rookie

Okay -
Checked the codes last night and once again had:
P1130
P1135

But the software lets you select mfg specific codes and under Toyota, they came back

P1135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1130 O2 Sensor Circuit Range/Performance (Bank 1 Sensor 1)

After some fiddling and constant software disconnects, I finally got to scan the Bank1 Sensor1 and it looked pretty flat. A scan of my TPS came back pretty responsive.

For comparison - I fired up my car and ran the same O2 sensor and got a nice up and down voltage reading. The TPS responded similar to the truck.

I could have been doing something wrong, but my intial conclusion is that I have a bad 02 sensor. The truck has a low 60,000 miles on it, so dropping a $110 on the sensor seems fair. If that doesn't fix it I'll install a new TPS and see how that goes.

As for the discrepancies with the codes - I have no clue

Thanks for your help.

Rook

midiwall

Yeup... 60k is about the general life of an O2 sensor anyway, so go for it!

fwiw, URD has the best prices we know of on sensors...
http://www.urdusa.com/product_info.p...s_id=430006000

(you bought your truck on the East Coast, right?)

Rookie

I'll keep URD in mind next time, but I have an account with Conecilli (Partznet).

I looked at thier site and while they probably use OEM parts, they don't say it. I know that at Conecelli, I'm getting an OEM part.

The car was bought at the same Carmax that Calg3 bought his truck at. They had it listed and priced as a 2X4 - I ran home and ran a CarFax - when it came through with a clean history (Bought in PA, re-poed, then sat on an Auction lot in NJ for 18months)
I ran down there and bought it immediately. The exact same model priced and listed as a a 4x4 sat next to it for $2200 more. I took advantage of thier pricing error and snatched it. We bought it in early 2003 with 27,500 miles on it.

Rook

MTL_4runner

URD does sell OEM sensors as well.

Good snag on your part for the 4runner!

Rookie

Well - I ordered the O2 Sensor and it turned out to be the wrong part#, so I returned it to Partznet. I also noticed that I would never be able to remove and replace any sensor located in the exhaust system. In addition to the minimal space available to work, Toyota has stripped all the bolts on the sensors, throw in a ton of rust and you need specialty tools and skills. I discovered I have California Emmisions while I was down there.

After some stalling this week I dropped off the car to the Stealership and the
Dealer fixed my car for $420, turned out to be the A/F Ratio sensor. They had to cut the old sensor out and weld a new bung into place. An amazing feat considering the 2" of work space provided by the exhaust and firewall.

As for the codes - this should clear some things up

The code:
P0125 Closed Loop Fuel Control Insufficient
is correct
The following are from the FSM and are correct:
P1135 A/F Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1130 A/F Sensor Circuit Range/Performance (Bank 1 Sensor 1)

Not what is listed here:
https://www.yotatech.com/~corey/tech/dr_z_obd/dr_z.htm
He has these which are Incorrect (according to the FSM) :
P1130 Lack Of HO2S Switch - Adaptive Fuel At Limit
P1135 Pedal Position Sensor A Circuit Intermittent

Good luck out there
Rook