Re: Help with TPS replacement (P0123/0121)
Very easy to replace the TPS yourself, I grabbed some tools and did it in my mother in laws driveway. Just follow the manual that Dave posted and you will have no problems. Also, while you are there, I would buy a can of throttle body cleaner and pull off the idle air controller (IAC on the diagrams) and clean the plunger. Just make sure not to twist it when doing so. Also, wipe off any buildup from the throttle body and plate with a rag and the cleaner. This will help keep a smooth idle and throttle response.
My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.