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Old 11-11-2009, 03:15 PM #61
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heres some 411 in case you are a dyi person: o2 sensor AFTER cat $67.99 w/o harness or with harness $99.99 from autozone 1year warranty. pep boys has it for $100 life time. O2 bosch from autozone BEFORE cat $57.99 w/o harness. $236.68 with harness 1year. pepboys o2 sensor before cat is $190.xx. life time. both parts stores no longer borrow the obd2 tools due to amounts of complaints and dealerships/mechanics shops not getting paid for use of there diagnosis. also since im going to change o2 sensor and clean the MASS AIRFLOW SENSOR. i should buy the obd2 scanner since the t4r getting old with miles its going to have more lights in the long run. any body know a good obd2 scanner tool thats friendly?
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Old 12-21-2009, 02:53 AM #62
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Had this problem a few weeks ago. Had the fault codes read, replaced the gas cap, disconnected/reconnected negative battery cable, problem solved. Sorry, don't remember the code.
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Old 01-19-2010, 02:26 PM #63
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Check engine light, VSC TRAC & TRAC OFF lights

I have got 4Runner 2001 124k.
Check engine , VSC TRAC & TRAC OFF lights came on. Dealership mechanics found code PO755 - bad solenoid. Replaced it for $600. It did not help, lights are still on. They asked me to drive one 100m and come back, I came back, they did not find anything, no codes. They offered me to change transmission for $4,500 because it might help. Though, they said transmission is working just fine. I do not see any logic here, why change transmission if it is working?
I refused to change transmission, lights are still on one month later. What to do? Any ideas?
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Old 01-20-2010, 04:14 PM #64
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my check light n VSC TRAC & TRAC OFF light were on. the code i got was bank 1 and bank 2 cat failure and o2.instead of replacing spending $1,600 on the cat $400 on a o2. i got rid of it by cleanning my mass airflow sensor it was dirty. add some guarantee to pass smog in the gas tank. ( my smog was due ) i reset the codes. i got better gas mileage too car ran better. all 3 light didnt appear. few week later my rear brakes went bad no padding on the pads and since that happen VSC TRAC & TRAC OFF light stays on without check light. hopefully when i get new rotors it'll go away i had to resurface my rear rotors its beyond mini with new pads. i did a obd2 scan no errors reported. VSC TRAC & TRAC OFF light only appear once it hit 3 mph. i dont think its your transmission. if your transmission is slipping or not working correctly i would just wait for it to be broken since another there going to replace it another $4,500. obd2 are very sensitive CHECK ENGINE, VSC TRAC & TRAC OFF LIGHT on because of bad emission, cat ,o2. 600 miles later i passed smog with flying colors. fyi not all dealership or some mechanics are not honest, some dont even replace the filters they charged you like jiffy lube.
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Old 01-20-2010, 05:50 PM #65
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code po755

Thanks for the kind answer,jdq4runner.
I looked at my dealership papers, they found po755 - solenoid B is not working properly. So they have changed this solenoid. Two weeks later I went to autozone, they have got same po755. Transmission is working fine. I can drive the car but how can I sell it with all these lights glowing?
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Old 01-21-2010, 01:13 AM #66
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If u just wanna erase the code n sell, light wont show up until few miles or weeks just unplug the battery for a while or buy a obd2 scanner, I bought my obd2 scanner at costco for $35 it tells u the error code n defines the code, instead of going online searchin for the meaning of the code, it also asked if u would like to erase the error codes, its friendly too so easy a caveman can do it, good luck selling it just fyi majority toyota cars I ran into usually have check lights but go away randomly misfire, or reading too rich or too lean cause them to pop up, besides that fwd n rwd toyota rear brakes wear out faster I don't know why. great cars in major accidents, I met a lot of people who survived major accidents at high speeds,/flipping over/ T boned.

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Old 01-31-2010, 04:49 PM #67
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I have a 2002 SR5 4x4, 130K+

I know this is long running thread but I have a few questions about the check engine, VSC track and VSC off lights.

Recently it snowed a lot and have been driving in cold wet conditions. I was driving down the road an dall of a sudden the three lights came on. I haven't done much yet, just read this thread mostly and I am hoping it is an easy fix.

I checked and the gas cap seems tight. I was going to clean the MAF sensor but can someone tell me where it is located? After that I will pull the fuse or battery to reset the lights and see how it goes. Another easy thing I remember reading to check is the vacuum tubes behind the air filter.

It sounds like another possibility is the O2 sensor/s. That seems like a lot to fix. Is it possible to clean the O2 sensors and fix the problem or is it most likely going to need to be replaced?

How hard is it to DIY? Do you have to take the exhaust off to get to the sensor or is it external? It seems like it would be an easy thing to replace but I don't know
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Old 02-01-2010, 09:59 AM #68
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Quote:
Originally Posted by Master Yoder View Post

It sounds like another possibility is the O2 sensor/s. That seems like a lot to fix. Is it possible to clean the O2 sensors and fix the problem or is it most likely going to need to be replaced?

How hard is it to DIY? Do you have to take the exhaust off to get to the sensor or is it external? It seems like it would be an easy thing to replace but I don't know
Check out this link for 3rd GEN O2 sensor replacement. 4x4Wire - Tech: Time to Replace the O2 Sensor on your 3rd Gen Toyota? I did mine at 100K as a preventative maintenence. Bought the DENSO brand on Amazon. Denso makes the OEM sensor that Toyota will sell you for twice as much. Good Luck.
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Old 02-11-2010, 08:13 PM #69
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drive cycle procedure

does anyone know where I can find the obdII drive cycle procedure on line for a 2003 4runner with the 4.0 I just did the zero point calibration on my yaw sensor and deceleration sensor to turn vsc light off. it also failed for the readyness moniters not ready and need to ntry and do a drive cycle

Last edited by rotten1; 02-11-2010 at 08:16 PM.
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Old 02-15-2010, 06:47 PM #70
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I just picked one of these up today. Now $29.97 at Costco.

Have an '07 4Runner SE with 39k miles. CEL and VSC lights came on a few weeks ago. Took it to Autozone and code came up with Cam position sensor error. Bought the sensor this weekend at dealer ($114) and put it in but lights still on. Disconnected the battery but still didn't clear. Once car is home later I will hook up the OBD2 and see if I can clear it, or see if something else is wrong. 39k miles!



Quote:
Originally Posted by jdq4runner View Post
If u just wanna erase the code n sell, light wont show up until few miles or weeks just unplug the battery for a while or buy a obd2 scanner, I bought my obd2 scanner at costco for $35 it tells u the error code n defines the code, instead of going online searchin for the meaning of the code, it also asked if u would like to erase the error codes, its friendly too so easy a caveman can do it, good luck selling it just fyi majority toyota cars I ran into usually have check lights but go away randomly misfire, or reading too rich or too lean cause them to pop up, besides that fwd n rwd toyota rear brakes wear out faster I don't know why. great cars in major accidents, I met a lot of people who survived major accidents at high speeds,/flipping over/ T boned.
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Old 10-20-2010, 09:58 PM #71
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just went thru this

Traveling on business, check engine light and vsc trac and trac off lights come on, when I start 2003 4runner in the morning.

Town I'm in has a Toyota dealership. While they are diagnosing, I google "check engine, vsc trac, etc" and get this thread.

Pay $40 for diagnosis which comes up "Diag. P2238-P2241 Both A/F sensors.
B1 S1. B2 S1"

Its explained that these 2 oxygen sensors are bad and that they need to be replaced. Total estimate with tax $588.12.

Call trusted mechanic friend, he says try getting home without fix. Worst that could happen is ruin catalytic converter which may need to be replaced anyway since I have 211,000 miles.

Decide not to fix.

Drive 250 miles home. Gas mileage excellent. No problems.

Next morning. No check engine lights or anything. Have saved $588.12.

Trusted mechanic friend suspects the sensors are dirty and simply need cleaning.

THERE IS NO RISK OF DAMAGE TO YOUR ENGINE IF THESE LIGHTS GO ON IN MY OPINION.

NO RUSH TO FIX !!!!

My 2003 4Runner 4wd SR5 6 cyl starts, drives and feels as good as it did when I drove it off the lot with zero miles on it.
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Old 12-10-2010, 11:48 AM #72
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Hello all. New to the forum (though I've been browsing it for months) and this morning I started up the '01 4runner to find all three of these lights on. This is the 1st problem of any kind I've had with this truck since I bought it used in August of '08. The only thing I've done to it besides regular maintainence is install a K&N cold air induction kit. I was told that the oil that you manually apply to the "good for life" air filter can accumulate on the MAF and cause problems. I was instructed to apply the oil very lightly to avoid any problems with the air intake system. The last time I cleaned an re-oiled the filter was months ago so I'm guessing that's not the problem.

Anyhow, I got the PO420 code. (I run a body shop so thankfully I have many tools and equipment at my disposal to deal with prettymuch anything auto-related). I disconnected the battery and the EFI relay and reconnected them after 1/2 an hour or so. Removed and inspected the rubber ring at the gas cap, OK. Tightened it to 5 clicks. Lights are off now. We'll see if that does it. If they pop on again I'll try removing and cleaning the MAF and try again. Although I wouldn't think the PO420 code would be thrown if it were only a problem at the air intake. Am I wrong? If still persists I'll probably look into purchasing the B1 o2 sensor. I've already checked all my HVAC lines and evap cannister, all look ok.

Side note: I got a little more horsepower and noticeably better gas mileage out of this truck after installing the K&N kit. For the most part I always leave my vehicles in stock form but I went for this kit and I'm glad I did. I'm at 121,000 miles. This is my 1st Toyota after years of owning GM and Ford products and I'd have to say I'm now a Toyota fan for life.
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Old 12-10-2010, 02:56 PM #73
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Quote:
Originally Posted by Johnate0 View Post
Hello all. New to the forum (though I've been browsing it for months) and this morning I started up the '01 4runner to find all three of these lights on. This is the 1st problem of any kind I've had with this truck since I bought it used in August of '08. The only thing I've done to it besides regular maintainence is install a K&N cold air induction kit. I was told that the oil that you manually apply to the "good for life" air filter can accumulate on the MAF and cause problems. I was instructed to apply the oil very lightly to avoid any problems with the air intake system. The last time I cleaned an re-oiled the filter was months ago so I'm guessing that's not the problem.

Anyhow, I got the PO420 code. (I run a body shop so thankfully I have many tools and equipment at my disposal to deal with prettymuch anything auto-related). I disconnected the battery and the EFI relay and reconnected them after 1/2 an hour or so. Removed and inspected the rubber ring at the gas cap, OK. Tightened it to 5 clicks. Lights are off now. We'll see if that does it. If they pop on again I'll try removing and cleaning the MAF and try again. Although I wouldn't think the PO420 code would be thrown if it were only a problem at the air intake. Am I wrong? If still persists I'll probably look into purchasing the B1 o2 sensor. I've already checked all my HVAC lines and evap cannister, all look ok.

Side note: I got a little more horsepower and noticeably better gas mileage out of this truck after installing the K&N kit. For the most part I always leave my vehicles in stock form but I went for this kit and I'm glad I did. I'm at 121,000 miles. This is my 1st Toyota after years of owning GM and Ford products and I'd have to say I'm now a Toyota fan for life.
This is why I do not use air filters that take oil on any car with MAF sensors. I had to many problems with getting oil on the sensor. Now on my Jeep Wrangler without MAF it works great.
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Old 12-16-2010, 03:45 PM #74
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Update: Light came on the next day. I removed and cleaned the MAF though I knew that wasn't going to be the culprit. The MAF was a little cruddy so I'm glad I took the time to clean it anyhow.

Bought an OEM a/f sensor from my usual Toyota dealer, my cost $140. Removed the old one (B1) and was amazed at how easy the nuts came off! I mean they were tight but not seized on like they always are. (Thank you, whoever had the presence of mind to use antiseize on those bolts.)

That was 48 hours and 200 miles ago and the lights have stayed off.

Dammit. It came back on. I get the funny feeling I'll be buying myself a CAT for Christmas.

Last edited by Johnate0; 12-20-2010 at 12:45 PM.
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Old 12-21-2010, 11:23 AM #75
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Got this problem on my '01 last night. I'll try most everything on this thread. Hopefully something works!
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