Been like this for 3 months. Thought it was the head gasket but it wasn't.

I got my head gasket fixed but now the car shakes. He said that its because i was running on 3 cylinders and now that its running on all 4 you can feel everything or something. He told me its the motor and T something sensor and it would be 300 to fix.

check connections and wiring to TPS with lab scope. car runs well need to get it through inspection

Why would my fuel system monitor be NOT READY and therefore will not pass emissions testing. There are NO codes be displayed neither hard codes or soft codes. Car runs great with no MIL codes but this system is not ready. Can anyone PLEASE help me to get thru emissions. Thank you for your time.

I've been down to the dealer 4 days. The 1st time they serviced the transmission, they told me to drive it over the weekend and I did. I brought it back in on Monday and they reset the computer module. It drove fine, then it started shifting weird again and would rev really high. Brought it back in, they have kept my car overnight 2x's. They can't seem to find the problem. It shifts weird when it's cold and now has a long lag between shifts. I just bought this car a lil over 30 days ago and it only has 60k miles on it. I'm frustrated and I have an after market warranty on this car and no one is providing answers. This happens intermittently as well. I'm over wasting my time, energy and gas.

transmission shifting problems


My car has check engine Light on with error code -
P0121 - throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem
I already did work at mechanic and the Throttle Paddle sensor was replaced as the old sensor had black spots on it.
After 20 Miles post repair, the check engine light came back on. Now also the code is same P0121.

Please help me, what could be wrong here and how to get rid of this check engine light code.

I stopped at a stop sign, and when accelerating to go, it barely moved, and sounded like I was reving up my engine. I stopped again, put the car in park then back in to drive and then it was fine. Drove great all the way home. What could be wrong with it?

I replaced a part of it I cant seem to fibd a blueprint of tge fuel line system on the internet just need to know where the line goes from the tank to the motor like how is ran

The light does not blink. It just went on. The code was 121 when we checked it. But i do not know what it means

My car is stuck in 2nd gear, the code is for shift solenoid A, I bought the part, now how do I know which solenoid is A?

2002 Hyundai elantra