EPC Light + No Throttle = HELP!

[Watson©]

Hey folks...

I done some searching before posting this up, but couldn't really find much info that would help me. Mostly all about the clutch sensor becoming loose etc and throwing up the EPC light. Nothing really about having throttle issues!

Right basically, my car was running sweet.... Was just driving to the petrol station and all of a sudden I have no throttle, it cut all revs and just sat in idle and the EPC light popped up on the dash. So I clutched it too the side of the road. Turned the ignition off and back on hoping it would resolve the problem, put my foot back on the throttle and nope, still nothing Phoned the AA and the guy came out, checked all my plugs, wires etc and everything was all in place. Disconnected the battery for a short period of time to see if it would reset. Still nothing. So he towed me back to my house. Next day I got my mate round with his vagcom.

He plugged it in and these are the fault codes...

Chassis Type: 6K - Seat Ibiza/Cordoba
Scan: 01 02 03 08 15 17 25 45 56

Mileage: 165570km/102880miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: Redir Fail!

Part No: 6K0 906 032
Component: 1.8L R4/20VT SEA 0002
Coding: 11500
Shop #: WSC 78904
VCID: E5C4BC5055FA

5 Faults Found:

18047 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal
P1639 - 35-00 - -
18039 - Accelerator Position Sensor (G79): Signal too High
P1631 - 35-00 - -
18042 - Accelerator Position Sensor 2 (G185): Signal too High
P1634 - 35-00 - -
17950 - Angle Sensor 1 for Throttle Actuator (G187): Implausible Signal
P1542 - 35-10 - - - Intermittent
17581 - Angle Sensor 2 for Throttle Actuator (G188) Signal too High
P1173 - 35-10 - - - Intermittent

Done some digging about on rosstech and came to the conclusion it was the 'Accelerator Sensor' that was knackered, So I got a replacement one, plugged it in and still nothing. Was still coming up with the same codes as before. We even re-aligned the throttle as I read somewhere that could result in no throttle.

Now I'm well and truly stuck too whats wrong with it. Could it be the ECU?

Desperate help needed here folks ... How do I resolve this problem?

Thanks in advance.

 

[godzuki]

Check the lambda sensors are ok under the car (not ripped off) it could possibly be your ECU if the previous is relevent.
1st thing i'd do is get your mate back & log on VAGCOM if the MAF is working,002 and watch the G/S reading to see if its working,this is what happened to mine.
If the above does not work,start checking EVERY sensor you can think of on the measuring blocks,it might bring the problem to light.

 

[andythom]

Tried running it with the maf unplugged?

My epc light comes and goes at times, haven't had much time to investigate properly....wil do this weekend

 

[godzuki]

Looking again,check the throttle body plug (un-plug it then plug it in again) and the wiring to it aswell.

 

[tom w]

Maybe the throttle body needs realigning ?

 

[Tucker157]

hey watson, you been having fun? gimme a shout when your free and we can pop it back on vagcom... im sure i seen the maf was ok..
im sure ive read somewhere on here that someone ripped off a lambda and it blew the ecu? anyone confirm that? major guttingness if thats the case!!!!

 

[Watson©]

I had a quick look underneath the car the night before it happened, when I had it up on the ramps changing the disks and pads, everything seemed all in place etc. Will get it jacked up at the weekend to have another look/further investigation. Already tried un plugging and plugging back in the throttle body, it's been re-aligned too. Haven't tried running it with the MAF unplugged, will give that a go, and get the readings for it from Vagcom too... Its a relatively new MAF that's been fitted, so can't imagine that being the problem. Will check all the sensors again.

Yup, been having fun Tucker... Not! Ha. I just want the damn thing to be able to drive, grrrr! So frustrating now, it's been sitting outside my house for nearly 2weeks and I haven't got any closer to resolving the problem

 

[Watson©]

Checked the MAF, unplugged and plugged it... Still no throttle

Checked the throttle body, unplugged and plugged it... Still no throttle

 

[monkeybreath]

Just a thought brake light switch ? could be that simple

 

[andythom]

Just a thought brake light switch ? could be that simple

Would this stop the rear brake lights or centre brake light working?

 

[LEE69]

All 3 i'd have said, all on the same switch.

 

[andythom]

Just thinking I intermittently have an epc fault and my high level brake light doesn't seem game....need to crack out the lap top I think

 

[Watson©]

Just a thought brake light switch ? could be that simple

Surly not... but I'll check.

 

[Pyro]

rear brake switch controls all three lights on the leons so would imagine its the same on these when mine went i still had throttle tho, have you checked the throttle switch for live? might be worth it.

 

[Watson©]

Checked all brake lights, they're all functional.

Checked the throttle switch when the problem first happened, that's all good! One of my mates has a spare throttle body that we shall try out.

Trying to get a old spare ECU to try out too, saves me splashing out to find out it still hasn't resolved the problem.

 

[peterdav]

wont rev

hi watson,if you ever find out how 2 solve this problem please leave me know as mine is doing the exact same thing? mines been off the road for atleast 6months naw ??

 

[Watson©]

Will do mate. 6months... oh dear

 

[snoopz]

Hi i've also been having the same problem since putting a de-cat on i've been told to change the gas peddle done that and no change, then i was told to change the ecu so i done that and it worked then 6.5miles later the same problem i am now very

 

[tom w]

Have you had the Decat mapped in ?? Or using a lambda spacer ?

 

[snoopz]

Hi tom, i haven't got it mapped in or a spacer on it but i will now try the spacer on it now you have said the thought never evan entered my head to be honest (hand over face) thanx for the quick reply