Check engine light, VSC TRAC & TRAC OFF lights

[KNOBmeister]

I got no codes when tested!

Joe
:bash:

All:

Finially got tired of trying the home remedys and took it to the dealer the other day.....

They diagnosed it as a 'Yaw sensor failure' ...... they reset it and now I'm up and running without VSC lights! .... 4Runner was under warranty so no charge! Took all of a 1/2 hour .......

So if anyone has a similar problem see if the dealer can handle it no charge under warranty!

Thanks to all for the suggestions. Learned a lot about my Toyota!

Joe

:beer: :awais: :beer: :awais: :beer: :awais: :beer:

 

[a77boy]

My codes seem to indicate bad o2 emissions crap. By the way HPK, disconnect your battery to reset your check engine light.

 

[greasefingers]

P0102=MAF sensor
Clean it but do not touch it with anything, just spray it every 30,000 miles with electrical/MAF cleaner and not brake cleaner.

 

[Jay]

Bump, its late and i need to read this tomorrow, my Check Engine light, VTC and VSC came on tonight while driving.

 

[a77boy]

Head over to Autozone and have the codes read

 

[JP4RNR]

Re: 04 T4R V6 2WD

I just had the "check engine" light come on...along with the "VSC Trac" and "Trac Off". Long story short, I cleaned my mass airflow sensor per someone comment on aftermarket CAI with oil build-up and residue. Well, mine had some residue on it which I cleaned with a q-tip and some "electronics cleaner" from Radio Shack. After cleaning, I started her up and the light was still on...bummer. I started it up a second time a lil bit later and it was gone. Woo!!! Hopefully it stays that way.

Hope this helps somebody. Later.

Even after the issue is identified and resolved the check engine light does not immediately go off after resolving the issue like earlier Toyota models. It can take several driving cycles to clear the error codes or you can disconnect the battery to clear the codes and check engine light.

 

[greasefingers]

Better yet

 

[dredhaus]

3 years later

I'm back with the same problem. My check engine light is on with the VSC TRAC and TRAC OFF lights on as well. Do these sensors go bad every few years?

 

[Jay]

Re: 3 years later

I'm back with the same problem. My check engine light is on with the VSC TRAC and TRAC OFF lights on as well. Do these sensors go bad every few years?

Mine has come on a second time as well, about 6 months after i reset it. I talked to my friend who work for a Toyota dealership as a mechanic, he said its hard to say what is causing it unless you can get the error code. Other wise just reset it again.

 

[sharp4runr]

Re: 3 years later

I'm back with the same problem. My check engine light is on with the VSC TRAC and TRAC OFF lights on as well. Do these sensors go bad every few years?

Hmm, it's coming onto 3 years since one of mine failed. Hopefully it won't present a problem. Although the other 3 have been running just fine since I bought the truck... The O2 sensors are not in a very hospitable environment so I'd say I wouldn't be suprised it fails again. On another note, the O2 sensors in my old celica never failed since I owned it.

 

[JP4RNR]

Re: Re: 3 years later

Hmm, it's coming onto 3 years since one of mine failed. Hopefully it won't present a problem. Although the other 3 have been running just fine since I bought the truck... The O2 sensors are not in a very hospitable environment so I'd say I wouldn't be suprised it fails again. On another note, the O2 sensors in my old celica never failed since I owned it.

In reference to your old Celica, The 02 sensor may have been the non-heated type sensor(heating elements were installed in newer sensors to get the 02 sensor to operating temperature quickly. When the heating element fails that sets off a code, eventhough the sensor portion that monitors oxygen content is still OK) and the new type of 02 sensor found in the 4Runner is actually called an Air/Fuel ratio sensor which is more sensitive as are more voltage increment values for the PCM to monitor also refered to as a wide-band 02 sensor.

 

[peter78]

Re: P0440 Code

I stumbled on this forum looking for diagnostics for this fault. For what it is worth, the Check Engine lamp and this code did coincide with a Traction Control fault. The systems should not be related other than both having ECM codes. Anyone have the traction system lamps go away after repairing for the EVAP problem?

Same thing just happened to me. My first thought was the TRAC and VSC somehow messed up. It turns out they light up as a default setting when the CEL comes on.

When this happens it is usually emissions related. I wish I had a loose gas cap. I had a faulty O2 sensor. Maybe all the lights go on so you will take it in???

http://www.toyota-4runner.org/showthread.php?s=&threadid=31608

 

[Mtneer001]

thanks for the thread. mine just came on as well.

i will probably take it to the dealership since it is still under warranty.

i have an '06 with 21,000 miles on it. seems like its awful quick to happen.

i will try the gas cap before.

 

[Mtneer001]

My lights came on for 3 days; now they're off.

Should I still be concerned or do you think there was a glitch in the system?

 

[jintsfan89]

04 4Runner V6 and driving home all 3 lights came on. Had one of the OS changed about 2 years ago. Is this normal and how many are there? I thought I read somewhere it has 3 or 2 OS? Just cleaned the MAF sensor 5 months ago so I don't think it that. Will top of the tank and check the gas cap. Any help would be appriecated.

 

[peter78]

04 4Runner V6 and driving home all 3 lights came on. Had one of the OS changed about 2 years ago. Is this normal and how many are there? I thought I read somewhere it has 3 or 2 OS? Just cleaned the MAF sensor 5 months ago so I don't think it that. Will top of the tank and check the gas cap. Any help would be appriecated.

I was told there are three O2 sensors on my 4Ruuner and they replace the one that needs replacing. My mechanic also said they go out like that on all makes of cars.

Checking the gas gap is the easiest thing to do, make sure it is tight.

I am not sure why all 3 lights come on, it does tend to get your attention though, doesn't it.

 

[jintsfan89]

Thanks for the reply and I hope this helps anyone with the same problem. Took it to the stealership today. It was a O2 sensor burned out. I was told their are 4 in total 2 in the upper exhast and 2 in the lower exhast. I have to find my paper work since i had one die on me about 1 1/2 ago. If its the same one I might be able to get my co-pay ($50) back. Luckily I bought the Extracare warranty and if I didn't part was $183 and labor $100 so its a nice chunk of change. I ask is this nomally 50k for one to die and they said don't know so go as early as 5k some last for 100k. My old car never had a problem but I did change both at 50k. I think you can do it yourself but need to know which one to change and maybe a special tool to get it out. Has anyone change one on a 04 V6 4runner?? Thanks in advance.

 

[cadolfan]

Re: VSC TRAC & TRAC OFF Lights

New User here and this site is a good find!
Same problem has occured on a 02 4runner I have w 105k miles. Checked the code and is P0440 x's 3 Evap Emissions Control Systems Malfunction. Autozone tech said is called a triple twin code P0440 listed 3 times same definition. Just topped off with gas and cap/seal tight/good. Recently had a new sound system installed and amp placed under the drivers seat. The problem happened in this sequence. I turned on the etc power button 5 min later while driving check engine and close behind the VSC TRAC & TRAC OFF lights came on. Could this be a wire off or sensor gone bad, or even a vacuum hose if so where should I look with this code? Thank you for any help as I try to do and can do most repairs myself.

I have an '02 4 runner with 112k miles and the same thing happened to me about 8 months ago. Dealership said they couldn't figure out why they came on (scary they couldn't figure it out). They said it was a sensor or something. They wanted to charge me $1k or they could just reset the lights which I opted for. Well today the all three lights came on. I read somewhere that you can reset the lights by disconnecting the batter cable which I did and the lights went off. I've read here that it could be a sensor or it could be just from topping off the gas tank.

Am I going to be doing damage by just reseting the light?

 

[bioelectric]

Hello all,
I have a 2005 V8, and last 2 months the VSC, Check engine, Track lights all came on. They go out after a while, then suddenly few days later come back on. This cycles like this over a month or two. Currently no lights on. I have 50kmile on mine, and O2 sensors are probably in order to be replaced. I'd give then 40-80k miles for replacement. There are 4 O2 sensors, 2-before the Catalytic, and 2 after the CAT. the 2 before are most critical for air/fuel sensing with the ECU. I am not sure that they are Wide Band sensors, however. (anyone have info on this?). Also O2 sensors can be damaged by additive in the gasoline. Any lead based product, like fuel cleaners/boosters, will degrade the life of the sensors. The before CAT sensors are expensive ($150 for each) while the after CAT is generally cheaper ($50 each) but tend to last longer, as the CAT breaks down/cleans the exhaust.

I think I'll replace mine upfront first in the next few weeks, and see what happens.

 

[greasefingers]

No
Wideband Oxygen sensors are not used in our 4th Gen runners. At least not in 2003.