EPC Light just come on!

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RSCosworth
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EPC Light just come on!

Post by RSCosworth » Wed Jan 20, 2016 2:50 pm

Hi folks, was out in my car 3 days ago & it performed faultlessly as it has since I bought it back in August last year! Put it away in the garage when I got home but have just gone to get her out again now & the EPC Light has come on/stayed on! Drove a stones throw up my street & back again & it still seems to drive fine & as it should, any ideas what's likely to be wrong??? :?
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R1RS4
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Re: EPC Light just come on!

Post by R1RS4 » Wed Jan 20, 2016 4:08 pm

RSCosworth wrote:Hi folks, was out in my car 3 days ago & it performed faultlessly as it has since I bought it back in August last year! Put it away in the garage when I got home but have just gone to get her out again now & the EPC Light has come on/stayed on! Drove a stones throw up my street & back again & it still seems to drive fine & as it should, any ideas what's likely to be wrong??? :?
It would be silly to guess mate, you need to hook up VCD's and then you can get some sensible feedback :biggrin3: :blackrs4:
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RSCosworth
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Re: EPC Light just come on!

Post by RSCosworth » Wed Jan 20, 2016 4:44 pm

Just been out in it round to my mates house (max. 1.5 miles there & back) & the light's now switched itself off & behaving as it should :? Still worth hooking up to a diagnostic machine to see what brought it on in the first place though would you say??
Mugello Blue B7 RS4 Avant, Black Optics, Buckets, FBSW, Carbon Inlays, Completely Standard

Previously owned:-
Nissan Sunny GTi-R
Renault Clio Williams
Ford Escort RS Cosworth
Renault Clio V6
Mitsubishi Lancer Evo 7
BMW M3 E46

TomRS
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Re: EPC Light just come on!

Post by TomRS » Wed Jan 20, 2016 6:52 pm

RSCosworth wrote:Just been out in it round to my mates house (max. 1.5 miles there & back) & the light's now switched itself off & behaving as it should :? Still worth hooking up to a diagnostic machine to see what brought it on in the first place though would you say??
Definetly worth hooking up and checking, could be a fault that might prove more common as time goes on who knows? for the sake of plugging it in and reading the codes i'd do it.
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The_Coat
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Re: EPC Light just come on!

Post by The_Coat » Wed Jan 20, 2016 7:43 pm

Had this the other week, turned out to be the MAF sensor after running a scan.
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RSCosworth
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Re: EPC Light just come on!

Post by RSCosworth » Wed Jan 20, 2016 9:31 pm

The_Coat wrote:Had this the other week, turned out to be the MAF sensor after running a scan.
Same symptoms as mine, light came on but car still drove normal then light went off again of its own accord??
Mugello Blue B7 RS4 Avant, Black Optics, Buckets, FBSW, Carbon Inlays, Completely Standard

Previously owned:-
Nissan Sunny GTi-R
Renault Clio Williams
Ford Escort RS Cosworth
Renault Clio V6
Mitsubishi Lancer Evo 7
BMW M3 E46

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The_Coat
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Re: EPC Light just come on!

Post by The_Coat » Thu Jan 21, 2016 12:35 am

RSCosworth wrote:
The_Coat wrote:Had this the other week, turned out to be the MAF sensor after running a scan.
Same symptoms as mine, light came on but car still drove normal then light went off again of its own accord??
Car still drove fine
viewtopic.php?t=117974
RS4 Avant - Misano Red

RSCosworth
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Re: EPC Light just come on!

Post by RSCosworth » Thu Jan 21, 2016 8:18 am

The_Coat wrote:
RSCosworth wrote:
The_Coat wrote:Had this the other week, turned out to be the MAF sensor after running a scan.
Same symptoms as mine, light came on but car still drove normal then light went off again of its own accord??
Car still drove fine
viewtopic.php?t=117974
Cheers bud, hopefully mine will be an easy fix like yours was then!
Mugello Blue B7 RS4 Avant, Black Optics, Buckets, FBSW, Carbon Inlays, Completely Standard

Previously owned:-
Nissan Sunny GTi-R
Renault Clio Williams
Ford Escort RS Cosworth
Renault Clio V6
Mitsubishi Lancer Evo 7
BMW M3 E46

kev4
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Re: EPC Light just come on!

Post by kev4 » Mon Jan 25, 2016 6:14 pm

I think my car was lying just over a week and the same thing happened, the EPC light came on.

There were no abnormal running issues, i turned off the car, restarted it and the light went off.

Later on in the day the light came back on, after a few miles the light, (touch wood) has stayed off, and done approx 150 miles
and the light has stayed off.

Is it maybe with lying a while in this damp, frosty weather?

Kev.

pcglader
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Re: EPC Light just come on!

Post by pcglader » Tue Feb 09, 2016 9:52 pm

I had exactly the same fault with mine, intermittent EPC light coming on, more and more over time, then eventually more and more over a period of 2 years.
Turns out it was the flaps in the inlet manifold becoming worn.
It could be this or a number of other things but worth the heads up for ideas as I was stumped, putting up with it until the engine management light came on and stayed on.
Hope you get it sorted, if not already. :thumb:
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