P2120 and P2125 codes

kj75 · **Posted:** Fri Apr 08, 2016 11:16 pm

HI all,

I just completed installing suspension upgrade.
I had the brake lines off, to make work easier, and bled all the lines after.
I also removed the plug that goes in the front hub (abs sensor), and it was in some white grease.

I am now getting P2120 - Powertrain (Throttle/Pedal Position Sensor /D circuit.
P2125 - Powertrain (Throttle / Pedal Position Sensor /Switch E circuit.
B2TAE - Body.

When I start the Jeep it seems to idle at around 1K, instead of 750.
Stepping on the gas does nothing, and I can hear the turbo whistling (maybe it's just the new Samco hoses).
Stepping on the brake reduces idle to about 750.
Tried resetting by unplugging the battery terminal for 15 minutes but no luck. Also cleared the code but comes back.

Any help would be welcome.

KJ75

Mike92104 · **Posted:** Sat Apr 09, 2016 12:48 am

Did you somehow disconnect the throttle position sensor? It might also just be a complete coincidence that it decided to fail at this moment.

kj75 · **Posted:** Sat Apr 09, 2016 4:27 am

Where would the throttle position sensor be located ?

kj75 · **Posted:** Sat Apr 09, 2016 5:54 am

Checked under the gas pedal and a plug was completely loose.
I'll put the Jeep back together and try again tomorrow.
Can't believe I spent a whole day looking for this.
Thanks Mike.

kj75 · **Posted:** Sat Apr 09, 2016 5:25 pm

Confirmed, all is OK after plugging TPS in and clearing the error codes.

Mike92104 · **Posted:** Sat Apr 09, 2016 6:46 pm

Sweet. I'm glad it was something easy.

P2120 and P2125 codes

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