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What causes my service engine light,abs,trac off light to come on and off

The light come on and off . I had one code about an o2 sensor in bank 2 what ever that is

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  • Cars & Trucks Master
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The o2 sensor is the one after the cat converter on the second bank of the exhaust system and needs to be replaced

Posted on Dec 12, 2014

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Posted on Jan 02, 2017

  • 14 Answers

SOURCE: Check Engine Light - O2 Sensor - bank 1 running lean

you should have three oxygen sensors on your car, one for each bank of three cylinders; should be towards the Y pipe on each exhaust manifold. Additionally you should have one on the exhaust pipe before the cadilitic converter.

Posted on Nov 20, 2008

ewashmidas
  • 362 Answers

SOURCE: o2 sensor bank 2 sensor 2

Bank 2 will the the passenger side or right side and sensor 2 is the O2 sensor behind the catalytic converter.

Posted on Jan 28, 2009

  • 112 Answers

SOURCE: 2002 Pontac Grand Prix GTP P0171 code engine stumbling at times

Bank 1 is the frt side exhaust manifold (did they say bank 1 sensor 1?),you can start by replacing that sensor,i would check the intake for leaks ,the gm 6cly. are known for bad intake gaskets,you will see oil coming out form the frt or rear of the intake,also check your atifreeze overflow bottle for bronwish sludge,which means that the oil is mixing with the antifreeze.A leaking intake could cause that lean condition.

Posted on Mar 29, 2009

  • 1861 Answers

SOURCE: 2004 Sequoia. VSC TRAC, TRAC OFF, and Check

It is not hard to change the sensor, it just screws into a threaded hole. The light will not go out immeditaly, after the sensor is replaced. It needs to go thru a drive cycle. Your best bet is to replace the sensor and get the code cleard by whoever scanned it for the 0031 code.

Posted on Jul 23, 2009

  • 21 Answers

SOURCE: 2004 Toyota 4Runner, Regarding The VSC TRAC and VSC OFF lights

Check your switches for the VSC, some get bumped on (due to their location) and some get stuck in the "on"position.

Posted on Aug 04, 2009

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On a 2004 toyota 4runner my check engine light, VSC light and my Trac Off light all came on at the same time, what is most commonly the cause?


The VSC and Traction system are basically using the ABS to work. The most common issue is a failure of one of the wheel sensors for ABS. Would think the engine light will probably turn out to be for ABS failure code. Most auto parts stores, and some shops will read codes for no charge - so take it and see if the code does show as a failure in ABS system. Some code readers can not read the actual ABS computer to give you a detailed code of what is causing the issue - but if you can read detailed code it may lead you to exact issue.

Mar 04, 2015 | 2004 Toyota 4Runner SR5

2 Answers

P0138 and p0158


These codes, po 138 bank 1 sensor 2 shorted to voltage and code po158 means bank 2 sensor two shorted to voltage. these are the two rear oxygen sensors in the exhaust system. there two up frt and two in the rear, check the wiring on the two rear sensors, make sure that the wiring is not cut or stuck between metal. if the wiring is good then replace both rear sensors, when you get them ask for the left and right after the cat sensors. or bk1 s2 and bk2s2. after replacing them reset the computer. go to an auto parts sotre or if you have a code reader you can do it. hope this helps good day.

Feb 19, 2012 | 2004 Dodge Stratus

2 Answers

The vsc light and the trac off light and check engine light all came on at the same time code p0420 comes up on my 2005 highlander what does this mean?


A p0420 sets after Engine and catalyst are warmed up, vehicle driven within set vehicle engine speed range and waveforms of heated O2 sensors bank 1 sensor 1 and bank 1 sensor 2 have the same amplitude.
Catalytic convertor and O2 sensors need to be tested

Apr 24, 2011 | 2005 Toyota Highlander

1 Answer

2000 windstar service light on


Your van has four o2 sensor's, the code should tell you which one is bad for exsample code should be like,
o2 sensor bank 1 sensor 1 or 2
o2 sensor bank 2 sensor 1 or 2

Also make sure you don't have a vacum leak.

Jun 11, 2010 | 2000 Ford Windstar

2 Answers

I get various lights on: transmission, ABS and


More like computer.. you will need to isolate the problem with one code at a time... sometime two codes are fixed, try this:
1. Check the rotor and break pad thickness, that normally will fix abs, brake or abs and tracs.
2. check engine could be as simple as an O2 sensor or fuel filter, coil pack, starter... each needs to be check'd.
3. check engine should identify condition codes.. go to princess auto and pick up the comptuer untit for 60$.
4. If it ain't burning oil.. heck have fun with it.
Have fun..

Jun 07, 2010 | 1999 Volvo V70

1 Answer

Replaced bank 1 sensor 1 O2 sensor with an OE


Those lights indicate an issue with ABS or traction control systems. In order to properly diagnose the problem the vehicle's codes will need to be read with a scanner.

Generally speaking there is no danger in driving the vehicle but be aware you may not have functioning traction control and/or ABS while those lights are present.

Feb 01, 2010 | 2003 Lexus Gs 300

1 Answer

2004 Sequoia. VSC TRAC, TRAC OFF, and Check


It is not hard to change the sensor, it just screws into a threaded hole. The light will not go out immeditaly, after the sensor is replaced. It needs to go thru a drive cycle. Your best bet is to replace the sensor and get the code cleard by whoever scanned it for the 0031 code.

Jul 23, 2009 | 2004 Toyota Sequoia

2 Answers

Transmission shifts hard when the trac off light comes on


youll need to scan for transmission codes. the trac off light is a default of the trans going into a default safety mode. Bad speed sensors and simple little bolt on items like that can cause the condition but only way to really nail it is with a computer.

Apr 06, 2009 | 1999 Oldsmobile Alero

2 Answers

2001 chevy cavalier trac light


Might have a front wheel bearing going out take it to a shop they can hook up a computer and tell you which bearing it is

Feb 03, 2009 | 2001 Chevrolet Cavalier

2 Answers

Service Engine Light


have u checked/ replaced your o2 sensors since you have owned the vehicle?

Jul 22, 2008 | 1996 GMC Yukon

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