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My Ford Taurus just had the oxygen sensor replaced. Now when driving, the seems to run by itself over 35 mph you dont even have to put your foot on the accelerator. When slowing down the tach/engine still runs high, then when you stop it suddenly drops down. When you start the car, the tach/engine runs high and you have to wait about a min for it to go down before you can put it in gear.

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Idle air valve is bad

Posted on Jan 20, 2013


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Posted on Jan 02, 2017


SOURCE: throttle/Idle/running problem - wants to run too fast, or stall out

yes he is correct also check for any vacum leaks into the intake this will cause the o2 sensors to tell the obc (computer) to compensate for the extra air entering the system and cause the engine to lean the fuel out that will cause a obd2 code saying the o2 sensor needs to be replaced when it is only a vacum leak

Posted on Nov 01, 2011

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SOURCE: would a bad oxygen sensor on a 97 ford taurus

When you start your car the computer needs time to calibrate. That means set a base level for all components. I would recommend that whenever you start your car be sure that the tachometer has dropped below 1 before proceeding. Also it is a good idea to not have any other accessories running while warming up (e.g. radio, blower).
Your computer starts to gather O2 readings after you have driven over 10 mph for 30 seconds. Your O2 sensor is starting to give out and giving your computer wrong voltages, this means that when you press the gas your computer cannot calculate the correct air/fuel ratio. The symptoms you are having are no doubt the cause of the bad O2 sensor, I would recommend you buy one on Ebay ~$45.

Posted on Oct 09, 2009

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SOURCE: 91 nissan Sentra losses power at highway speeds

remove the front 02sensor and drive the car like that, remove means complety take it apart from exaust, if problem goes away or gets so much better then your catalitic converter at the exaust is restricted and need a new one

Posted on Jun 19, 2008

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SOURCE: Car "bucks" and sometimes engine dies-intermitently

as odd as this may sound its a power (electrical) problem check the battery the alternator and the cable coming off of the alternator my car does this when there is not enough current to (something?) lol.... so check all those thigs and report back

Posted on Aug 02, 2008

  • 1 Answer

SOURCE: Slow acceleration from stop and when driving (trying to pass)

I have the same car. So far no problems with the Transmision. I had the Trans oil change out every 60 K Sure sounds like you need to get the Transmision checked. Is the fault light on. I have invested ina fault code reader sure is worth it. 
Good luck.  Vilmos

Posted on Mar 03, 2009

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99 ford Taurus won't go over 35-40 mph, however speedometer reads 120 mph from start. Tranny seems fine and no check lights whatsoever.

Scan the vehicle for fault codes first. Sounds like you need to check the vehicle speed sensor signal into the speedometer. If that is ok then send the speedo head out for repair.

Mar 07, 2015 | 1999 Ford Taurus

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Shifting problem

Take to a transmission shop, likely you need overhaul or replacement.

Jan 16, 2014 | 1994 Ford Taurus

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Car idles rough upon starting then smooths out but sensor light is on. Replaced oxygen sensor 2 yrs ago. Any idea what sensor it could be?.

Maybe your coilpack? The humidity isnt good for old coil pack! after few minutes the heat of the engine dry it and run better

Jan 12, 2013 | 2002 Ford Taurus

1 Answer

2006 Ford Taurus code P0152

Common Problems That Trigger the P0152 Code
  • Defective Oxygen Sensor
  • Faulty Oxygen Sensor wiring or connections
  • Shorted Oxygen Sensor Heater element(s)
Common Misdiagnoses
  • Oxygen Sensor is replaced when the problem is faulty Oxygen Sensor wiring or connections
  • Oxygen Sensor is replaced when the problem is an over-reporting Mass Air Flow Sensor, clean mass air flow sensor first, to see if thats the problem. good-day ! just type this in search on pc. 02 sensor symtoms, and it will give you the details of a bad sensor.

Apr 27, 2012 | 2006 Ford Taurus

1 Answer

I have a 93' Ford Taurus that failed emissions

run the fault codes to find the faulty sensor
sensors that control the exhaust emissions are the HO2S ( heated oxygen sensors in the exhaust manifold/s
the O2 sensor ( oxygen sensors after the cat converters ) and the EGR unit that recycles exhaust gas back through the engine to re-burn the gasses

Oct 17, 2017 | 1993 Ford Taurus

2 Answers

I have a 2000 ford Taurus that putts at idle, but not at acceleration. Car stalls when not warmed up. I have to keep my foot on gas pedal to keep car from stalling when warming up. I've had oxygen...

There is an idle control valve in the air intake circuit that gets dirty. Ford says not to clean this valve but to replace it. However cleaning seems to work for me.

Aug 04, 2011 | 2000 Ford Taurus

3 Answers

My ford taurus has a problem my check engine light is on but it seems to be running smooth i dont see any reason why its on what can be wrong

Drive to Schuck's/Kragen/Chief's/Checker/NAPA/O'reilly's, they will read the the codes for you and tell you what is the code.....more than likely a sensor is bad......they will check this for FREE!!!

Feb 27, 2010 | 1996 Ford Taurus

1 Answer

When i am driving and the speed gets around 35 mph the car starts missing. What could be wrong and what do I have to do to repair it?

Its possible that it could be an exhaust catylisator and/or oxygen sensor problem. I would first go to an exhaust specialist to check out the system.
Does the engine feel sluggish when starting to drive, is the fuel consumption increased ?

Nov 04, 2009 | 1999 Ford Taurus

1 Answer

Oxygen Sensors 1995 Ford Taurus

Replace them Both. There is no way to tell which one is sending the Codes.

Jan 04, 2009 | 1995 Ford Taurus

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