So the check engine light is on, until I touch the gas, then it goes off. Car seems to run just fine. I've seen it bounce the idle up and down a bit, but it settles down once warmed up, and it never shuts off on its own. Any ideas?

Should be able to get an error code out of it.

Maybe the low range plunger on the TPS sticks momentarily? If it's out of adjustment the check engine light will usually illuminate.

just check the codes

ahhh, the codes. I gotta get used to this whole "s5" thing.

you should be done checking them by now so whats the info>?

I'm at work! Car is at home.

oh nm

12. Throttle sensor - full range

try adjusting the tps, like an s4. it may not fix the problem. s5 is kinda lame, 2 tps's but they dont adjust seperately like they should

I though the big screw on the front did the low range and the screw on the back of the throttle body (near the firewall) did the high range?

lol, maybe i'd have to look at it. a buddy of mine bought a white vert and he had a white coupe and they both had tps check engine lights, he swapped tps's from car to car, and that fixed it https://www.nopistons.com/forums/pub...1047683561.gif

lol, I don't know either, I have had 1 S5 car and no S4's, it seems everyday I learn something new. It seems strange that swapping the TPS from car to car would fix the problem, but whatever works I guess. https://www.nopistons.com/forums/pub...#>/biggrin.png

yeah, lol the lights went off, everyone was happy

Before you toss the bad TPS, try some contact cleaner.

Spray it in the gap between the plunger & the sleeve, work it in, & blow it out.

I use CRC "QD contact cleaner" from the electrical section at Home Depot.

It's good for all kinds of switches, contacts, position sensors, & controls.