Question about 2005 Ford Mustang

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2000 3.6L ford Mustang with TPS trouble code P0122

Hello guys,

I really need help! I own a 2000 3.6L engine ford mustang with 47,500 miles. I’ve been having power issues where I run my car at sixty and it actually feels like it’s running forty miles an hour. I used my OBD II scanner and received one trouble code: P0121.….In range throttle Position Sensor (TPS) fault. So instead of using a digital multimeter which I currently don’t have I changed the TPS with a new one from Auto Zone, after changing the sensor I turn the key to the on position; engine is not running and the dash bored displayed “Service Engine Soon” the dash was not displaying this light with the old TPS. So I ran the OBD II again and this time it gave me one more code but different from the first trouble code: P0122...Throttle Position sensor TPS/ Padle circuit low input. I assumed it was the cable harness that was bad, I also called Auto Zone and they told me the same thing. So I purchased a new one from my nearest ford dealer and remove the old one. I ran the car once around the block and no lights, I shut off the car/turned it back on and ran it again around the block and the “Service Engine Soon” light came on. I ran the OBD II scan again and it displayed the same trouble code P0122. I do feel that when I’m driving the gas pedal sticks once in a while and if I hit the gas suddenly for more power the engine stalls for a few seconds. Could it be that the throttle valve (padle) is damaged and needs replacement or maybe just an adjustment? I checked in the Haynes manual and it said that the 3.6L and 4.6L engine idle speed is not adjustable and that this procedure requires a special scan tool to extract working parameters (voltage signals) from the EEC-V system while it is running. I feel at a lost!


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  • furien2 Mar 15, 2009

    I took the TP Sensor that I bought at Auto Zone and changed twice with no good results! I went back to the store and decide to get a 2001 TP Sensor and this resolved the P0122 code and now my car is running strong and smooth. Auto zone sold me the incorrect sensor although the model and year where correct on their computer, the TP Sensor was not! All this time they had me running around like a rat. They think they know it all but they don't so watch out!



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  • 33 Answers

Make sure you installed the correct TP sensor. If so you may have a bad one. I have gotten bad "new" parts before. If all your problems started with the installed part start there.

Posted on Mar 12, 2009


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SOURCE: 1998 Jeep Wrangler Sport codes P0121 and P0122

did you check voltage to sensors if you need help with proedure, contact me, or you may try patrs houses on line in how to section.

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SOURCE: codes p0112 p 0113 p0016 p0117 p0118 p0121

Hello! The common point is that all 6 codes are associated with the 5 volt DC reference supply...Tell me exactly what went on with the seat cable repair...Include wire color codes...


Posted on Feb 01, 2011

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