Ford - Mountaineer :: 1997 - O2 Sensor Replacement?
Jan 28, 2013
I have an 1997 Mountaineer AWD with the 5.0. The vehicle has 235,000 miles on it and has run great all this time. Early in the month the Check Eng light came on, I check the code and got "P0141 O2 Sensor Heater circuit Bank 1 Sensor 2". I check and found out it is the O2 sensor behind the Cat that is bad.
I have never change any O2 sensor on this vehicle since I have got it brand New. I have changed the oil every 5000 miles and flushed out the trans every 50,000 miles. New plugs and wires at 100,000 miles. I take good care of my vehicle as best as I can.
My Questions are, should I go ahead and change all the O2 sensor's? Which brings me to ask. How many O2 sensors does this vehicle have and where? Could it be something else causing the check eng light to come on? How bad is it to change all the O2 sensors out?
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I own a 2003 F-150 4.2 engine 2 wheel drive extended cab. I need finding an easier way to get at the O2 sensor connector on bank #2. I am having a trouble code of P0171 and want to check the sensor to see if it is working...
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I have a check engine light on which diagnosed by Autozone relates to O2 Sensor, Bank 2 Sensor 1.
I realize sensor 1 is upstream before cat converter. However, I've received varying opinions as to which side is Bank 2, driver or passenger.
2010 F150 4.6 V8, produced in 5/10
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I have a 2003 F150 SuperCrew with 180k. Has been a great truck. Last fall the check engine light came on, and I took it to Advance Auto and they said to replace the lower O2 sensor. Did that and light stays on. Ever since then, and getting worse, is when I crank truck, it idles very rough, and if it sits too long it will just "choke itself out" and quit. Recently this has happened while driving on road too. I have to shift the gearshift to N to crank it. I get power but no crank if I try it in P.
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My 02 Explorer (XLT, 4.0) decided to throw a new code today. PO136, O2 Sensor Circuit (Bank 1 Sensor 2).
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I have the sensor on order and plan to get it done on my days off next week.
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This is a pic of my 99 with new TPS installed : [URL] .....
Without removing the whole assembly you only need to remove the 2 T25 screws and the connector to replace.
Since this part is listed for more then 20 Ford trucks I figured it would work in my 99 7.3. I bought a brand new TPS from Pete (F250_) that he could not use. He has a 2002 with one 5 wire connector. It works perfectly in my 99. Not sure if it will work in a 2000 or 2001 but if the TPS and IVS each have their own connector it should. Make a visual inspection to be sure.
Part DY-967 or F4SZ-9B989-AA - Potentiometer
I was going to go with a Dorman TPS but like PartsGuyED likes to say "OEM Baby". The OEM TPS through Ed is actually cheaper then the Dorman.
Side-by-side pic of the old and new TPS. Only the center rotating part is different but it fits and works just fine. It also has a better fit so there is less slop and almost immediate response.
NewOldTPS.jpg?t=1269362105
By the way, the original TPS was working fine so I have no idea what the symptoms of a bad TPS are. Since it was available I replaced it to have a spare and to see if this one would work. Both Pete and I thought it would and we were right.
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Guzzle has it pictured here:
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