Question about 2002 Ford Taurus

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Check engine light is on, replaced o2 sensor`s and it`s still on.

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  • 16 Answers

First erase the code. then if it is still on it may be your catalytic converter.

Posted on Apr 18, 2013

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Posted on Jan 02, 2017

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SOURCE: check engine light is on 2002 taurus SEL DOHC

it could have been running bad with the bad plugs. reset the computer and see if the light comes back on. you may have already fixed it. to reset the computer take the positive cable from the car off the battery and give it 3-5min to discharge then touch the positive cable from the car to the negative cable (still attached to the battery) for about 5 seconds and then hook back up the positive post and that will reset the computer.

Posted on Mar 30, 2009

emissionwiz
  • 75822 Answers

SOURCE: 02 sensors

the printout from Auto zone tells you that there is a probelm with fuel mixture control, this doesn't always mean the O2 sensors are defective, intake leaks and iother factors can give O2 codes, give me the code you have and i will let you know the most likely problem.

Posted on Jul 02, 2009

  • 1986 Answers

SOURCE: Where is the O2 Sensor located on 2003 Ford Focus?

The code will tell you which O2 sensor it is.
The code will point to either bank 1 sensor 1; bank 1 sensor 2; bank 2 sensor 1; bank 2 sensor 2.

From what I remember with a focus, it should only have 2 sensors, sensor 1 will be located before the cat, and sensor 2 will be located after the cat.

Posted on Oct 08, 2009

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SOURCE: reset ems (check engine light) on ford expedition

Try to remove positive baterry terminal for 20 minutes and install it nack. That will reset your ECU and it will run little rought tilll learn new change in 02 sensor.

Posted on Feb 20, 2010

  • 3640 Answers

SOURCE: I Had a p1131 code replaced o2 sensor before cat

vacuum leak in PVC line or clogged PVC. its a leak after the map sensor. o2 sensor is correcting for a lean condition so its adding fuel to your car when the o2 sensor detects the extra air.

Posted on Jul 24, 2010

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96saab 900s check engine light on code p1115 replaced rear 02 sensor then replaced front o2 sensor check engine light came back on.


you will also need to check the wires coming off both o2 sensors and also sometimes the main CPU gets fried always sending those codes

Sep 24, 2014 | 1996 Saab 900

1 Answer

P0136


If you replace the o2 sensor and that is the problem of why the check engine light is on then yes it will reset on its own. this will take a few days of driving due to the computer running all its tests and all passing then light will shut off.
the code you have is for a bad o2 sensor or wiring to it, there are a couple of o2 sensors, this code is for the rear o2 sensor.

May 09, 2013 | 1998 Volvo S70

1 Answer

O2 sensor is notr giving proper voltage signals and I need them check engine light to go off until I can produce the funds to replace the o2 sensor how can I do that?


The computer will keep lighting up the check engine light as long as there is a problem with a sensor in the car, which the O2 are. You will have to replace those O2 sensors to get the check engine light to stay off, if that is the only problem with your car. Have the trouble codes read from your car to see if anything else is also bad.

Aug 31, 2011 | 1996 Nissan Maxima

1 Answer

Symptons o2 sensors


If your O2 sensors are malfunctioning, the main symptom would be that the Check Engine light will come on. On some vehicles, an O2 sensor circuit shorted to ground can cause a no-start problem.
If the "Check Engine" or "Service Engine Soon" light is on and there is a code for the O2 sensors, I would like to also advise you that many O2 sensor codes are not caused by the O2 sensors themselves. In many cases, the O2 sensors are only REPORTING the problem. for example, a code P0171 "Oxygen Sensor Lean" code is rarely ever caused by the O2 sensor. It is usually caused by a vacuum leak or a failed Mass Airflow sensor (MAF) or Manifold Absolute Pressure sensor (MAP) or a bad fuel injector. In these cases, repairing the real reason that the engine is running lean will fix the O2 Sensor code without replacing the O2 sensor.

Mar 12, 2011 | 2000 Chevrolet 3500

1 Answer

Check engine came on I replaced the o2 sensor. check engine light


You need to know what codes you have stored
Your O2 Sensor, may not be the problem,even though you get an O2 Code. That may just be the symptom

May 31, 2010 | 1993 Dodge Caravan

1 Answer

I have a 2005 Chrysler Town & Country with almost 100,000 miles. The check engine light came on about 2 months ago and the code said the O2 sensors needed to be replaced. About a month later, the...


there are no codes that say replace O2 sensors,or remove converter,Thats just somebody's guessing,When it says O2 sensor that tells the mechanic to look for trouble in that area,wiring or faulty readings,And there are four O2 sensors.

Jan 20, 2010 | 2005 Chrysler Town & Country

2 Answers

I have a Honda Accord 2003, how can i fix a downstraem Oxygen sensor.. does this affect the gas cosumtion performance.. how can i fix this.. Help.!


o2 sensor is very important part to the engine when it come to the fuel economy. o2 sensor send information to the computer (ECU) which compute and calculate ratio of burnt exhaust gases. if the engine is not run properly either is too lean or too rich the o2 sensor will detect it as the car will triger the check engine light. you can drive the vehicle which will not hurt it as long you can tolerated the light however the car will get terrible gas mileage and poor performance as the ECU will try to lean the engine out itself. o2 sensor is fairly cheap to replace and fix. Let assume the car get 30 mpg on the high way, running with check engine light/bad o2 sensor will change the gas mileage to 18-25 mpg. If the car is V6 make sure you replace o2 on both side. good luck!

Nov 23, 2009 | 2003 Honda Accord

1 Answer

Check Engine Lights On


if the code is for the rear cat o2 sensor i suggested to replace the cat. the rear o2 sensor is to tell the commputer ha good is the cats if the cat not burning the gas. the commputer need to see the o2 sensor to check the cat's

Apr 17, 2009 | 2000 Toyota Corolla

2 Answers

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.

Nov 20, 2008 | 2002 Chevrolet Monte Carlo

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