Question about 1998 Ford Explorer

2 Answers

I get a DTC P0133 code on my 1998 Ford Explorer V8

I replaced the O2 Sensor Bank 1 Sensor 1 and still get the same DTC code.
The Freeze Frame Data reads:

Fuel System 1
Closed Loop

Calculated Load
43.5%

Engine Coolant Temperature
199 Deg F

STFT Bank 1
-4.6%
Lift Bank 1
-3.1%
STFT Bank 2
-3.9%
Lift Bank 2
-3.9%

Engine 1934 RPM
Vehicle speed 64 MPH

Can you give me an idea of what may still be wrong with it?

Posted by on

  • 9 more comments 
  • amaldo67 Jan 13, 2009

    The engine light is on. This is the only DTC displayed. The vehicle is running fine. The vehicle will not pass NJ inspection.

    Thank you for your response.

  • amaldo67 Jan 13, 2009

    I am using an Innova 3120 Scanner. I do not have graphs or understand how to read them. I recently purchased this vehicle. It may need a tune-up. Can this be the problem?

  • amaldo67 Jan 14, 2009

    Two drive cycles were performed with the new sensor. The dash light went out when cleared and turned on after the drive cycle. I do not believe it is the old or new O2 sensor. I believe something else is causing it.

  • amaldo67 Jan 20, 2009

    The problem turned out to be the EGR tube connecting to the exhaust manifold. A crack in the metal tube was causing the error. Thank you for your help.

  • elranchero_1 Feb 27, 2009

    i have the some problem on my 1998 ford expedition code p0133 what is the commun problem ot than

  • yadayada
    yadayada May 11, 2010

    I need a graph of the sensor performance, these figures yeild little useful info, I am a Ford master electronics tech.

  • grandpasteve May 11, 2010

    is that the only code to come up the p0133 is a slow response from the 02 sensor it does not mean it is bad , what esle if anything is it doing..

  • Anonymous Mar 14, 2014

    P1349 code changed ocv bank 1 and month later back on car shaking and misfiring and Idea what wrong ?

  • Anonymous Mar 17, 2014

    where is bank 1 sensor 1 on a 1998 saturn 1.9 engine

  • Anonymous Mar 21, 2014

    When it gets to 45 Mph t doesn't like to shift also it takes me about 5 times to turn the key before my car will turn on

  • Anonymous Mar 25, 2014

    replace the part

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2 Answers

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  • Ford Master
  • 78,257 Answers

It may be a defective O2 sensor here is th difinition:
P0133 - Heated Oxygen Sensor (HO2S) Slow Response Bank 1 Sensor 1 , this is the sensor on the side of the engine that #1 cylinder is on, it is the sensor before the cat.

Posted on Jan 14, 2009

  • yadayada
    yadayada Jan 20, 2009

    I was wondering is a TFT rating fair, this was a one in a 1000 problem, as a Ford tech never saw it once, so i gave advice based on that experience and repair background. One note we are not employed by Fixya, just tech's trying to help, glad u found the problem, will make a note of it.

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  • Contributor
  • 14 Answers

Can you take back the sensor for a new one or test to see if the sensor is getting proper voltage , did you try and clear the code.. it should at least turn off for few minutes unless the voltage to the sensor is incorrect ... will look into some other causes,, and get back with you

Posted on Jan 14, 2009

  • grandpasteve Jan 14, 2009

    try diving the car on the hiway for 30 plus minutes , it could be carbon coated parts causing the light to come back on try putting some fuel cleaner and running that thru and check your codes after driving on the hiway or any long trip , i know it is hard to fix something when you cant see it but if you need anymore help just ask

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