B7 RS4 - EPC and Engine Management Light on?

[iluvmercs]

Morning all!

I'm hoping someone can please give me a clue as to what could be going on here.

My car 64,500 mile RS4 had the EPC come on during a PistonHeads Run earlier today.
The light stayed solidly on after the car was switched off.

Arrived at a breakfast venue - 2 hours later I started the car and the EPC is still on, but now with engine management light, too.

The car starts, idles and runs just fine - I did notice when the EPC came on my revs were limited to 6,800rpm. It was after I felt this that I saw the EPC light on.

I nursed the car home OK.

After chatting with some people on at the Run, emissions sensor of some kind was the general conclusion.

Could anyone with some RS4 specific knowledge perhaps lead me in the right direction for when I phone the garage tomorrow.
After taking it easy home without issue, would it be necessary to recover the car, so drive it in myself?

Any thoughts would be most welcome.
Thanks in advance,

Darren

[Dr G]

Knock sensor and cat failures are not unheard of.

Take it slow and smooth unless it's obviously misbehaving, missing or leaking.

[iluvmercs]

Swift and learned response as ever, Dr G.
Hopefully it will be the former, what with I assume it being the much cheaper of two!

Thank you

Darren

[Gusto]

I had this - ended up having new MAF (on warranty so no clue as to cost sorry) and had throttle body cleaned for good measure. Good luck.

[lengster]

Stuck flaps in the intake was what was wrong with mine,done under warranty years ago.

[iluvmercs]

Thank you for further replies.
It really helps to know what could be wrong and where to look.

Thanks again

Darren

[Dr G]

If the flap motors have had it get them locked out or deleted and a map to suit - 'free' power

[iluvmercs]

I'll be sure to ask, Dr G

The car was dropped off at the bodyshop today for some long-awaited and planned paint work (obviously it won't be driven while there).

Lights on, it behaved going there although it did hunt at idle on a cold start until the choke adjusted itself.
It will be picked up in a week and straight to Audi.

Thank you all again for the suggestions

Darren

[iluvmercs]

Just a bit of an update for those who may have wondered.....

The car was dropped off on Friday and I've just heard that a solenoid failure for the inlet flap was blame.
However sad it is, I won't be taking the aforementioned free power route, so the old girl is having the faulty item replaced

Thank you all again for your input

Darren

[Stutt]

Hi.
Just noticed with just ignition on i get epc light.but goes off when start.
Is this a normal check with start up or should i get looked at?
Car runs fine.

[Stutt]

Hi.
Just noticed with just ignition on i get epc light.but goes off when start.
Is this a normal check with start up or should i get looked at?
Car runs fine.rs4 b8