Throttle Position Sensor

**jonathanfenton** · 27-04-2011,01:23 PM

Hello All,
The Mrs was reporting that her car felt "weird". Like the throttle was different. I took it for a spin and it drove fine to me. I did a fault code scan and it came up with Throttle Position Sensor intermittent. Cleared the code and took it for another drive and it came back. Its a cable throttle so not sure if the ECU needs to know where the throttle is as there is the mass air flow meter etc so it knows the engine is hungry. All i can put it down to is it helps anticipate what the throttle body will require :S. Any more information on prices etc would be appreciated. I am pretty sure its the sensor sat on the throttle body?. I think its ready for a clean!. Any one got a link to the throttle body alignment stages from ross link?

Thanks to all who can help!

**Crasher** · 27-04-2011,01:25 PM

Which car as it can’t be the A3 2.0 Sportback140 Sport?

**jonathanfenton** · 27-04-2011,01:26 PM

lol sorry no thats mine. She has a 1.8t Audi A4 B5 on an N Plate.

**Crasher** · 27-04-2011,01:29 PM

Do you have the cars engine code (AEB?) and the fault code number?

**jonathanfenton** · 27-04-2011,01:33 PM

AEB030111

Fault Code 16505

thanks

**jonathanfenton** · 27-04-2011,02:49 PM

Took the throttle body off and cleaned it with brake cleaner and scrubbed all the carbon off greased up the throttle return spring and put it all back togeather and ran it up and down the road and it seems fine if not a little more responcesive... will have to keep an eye out on the code it keeps throwing back. I actually ran it with the cable unplugged and it still ran great. Not sure if these sensors do much!

**Crasher** · 27-04-2011,05:23 PM

16505 Plausibility of throttle valve potentiometer

1) Moisture or corrosion in plug connection at potentiometer
2) Potentiometer defective

Causes

1) Slight misfiring under acceleration
2) Idling speed control behaviour unstable
3) Load change jolt on accelerator release
4) Restriction of boost pressure (AEB engine only)

Test

Check throttle valve control part

Perform Basic Setting 04, group 098

**jonathanfenton** · 27-04-2011,06:40 PM

Please could you elaborate on

3) Load change jolt on accelerator release

What does it mean by jolt? It is prone to hesitating before dropping when dipping the clutch when stopping

**Crasher** · 27-04-2011,11:31 PM

That was cut and pasted out of the manual, basically when coming off the throttle to change gear the car can jolt.

**jonathanfenton** · 21-10-2011,02:11 PM

Well i finally got round to changing the throttle body (to refurbished one off Ignition Parts £93) as the old problems it had returned. My laptop with my vagcom died so couldn't do a throttle body adaptation so just took it on a few mile drive. Got it warmed up and gunned it down a few straights and it seems to drive fine. Am i right in thinking that a throttle body adaptation just cuts the learning time down or do i still need to do it? Its 95% there but can still sometimes idle just over 1000 instead of 800 will it get better with time?