weird pulsation
 

My car is giving a weird pulsation and everytime it does it my check engine light pops on, does anyone knows what is it?

Rather than guessing, you need to blink the check code.

How do you blink check the code?

I have found that i have a code 12, I have also notice that it happen when my car shake or while shifting gears hard. As i recall i hit the bottom end on saturday. And this came to appear on saturday right after it happen.

Your profile says it's an S5.
Code 12 = Long range TPS. That signal is used to run the metering oil pump.

I have had good luck with spray contact cleaner.
Spray it in between the plunger & sleeve of both TPS's.

I get it from the electrical Dept at Home Depot.

Will you break the steps for me?