EPC light means new throttle body?

[slowrideBC]

I have a 2000 s4, twice while driving my car looses all power and the EPC light comes on in the tach. A quick pull over and restart seems to get me going again.

I also am getting this code when the error happens:

17743 - Engine Torque Monitor 2: Control Limit Exceeded
P1335 - 35-10 - - - Intermittent

After some googling it seems that the throttle body is shot? Anyone have this happen? Anyone have one for sale?

Thanks

ps. tial 605s rock!

[bigern45]

everytime my EPC light has come on and the car hiccups, its been a throttle body. remove the tb and then move the blade open and shut; all of mine hung up so raatarrdedly tight i dont even know how the car ran.. lol.. improper torque with the APR bipipe was the only thing that i would say contributed to this failure, with my ARD pipes and a samco ive yet to have an issue..

if you dont have an APR bipipe then i suggest cleaning the throttle body, if it moves freely with no hangups that may be the only issue..

[slowrideBC]

thanks for the quick response. I believe I have the stock bipipes. Ill check the throttle body...

Can I use brake clean to ungunk the throttle body or do I have to use a gentle cleaner like a MAF/electronics cleaner.

[bigern45]

no, its completely mechanical-- even where the plug in is, its extremely rudimentary for what you would think of an electronic throttle body would/should look like internally. i wouldnt saturate it, of course, but just getting it good enough to where you can use an old toothbrush or a towelette should be fine..

[slowrideBC]

awesome...gonna take a look in a bit thanks for the help

[Dayne]

I have a 00' s4 and my EPC light comes on at start up but goes away a second later and I never see it again.

[morris400]

i had a epc light come on for almost 6 months, when i switched to a new ecu it went away.

[slowrideBC]

i have two ecus, it does it on both...I am also getting a misfire. I have been told its possibly my coilpack causing the EPC light. EPC only comes on when Im on it at high RPM. My throttle body looks good. I am getting a used one for $50 from a local member...I think it may be time for 2.0 FSI coil upgrade?

[dannyn424]

It could be one of three things......
1)tb
2) ecu
3) wiring between ecu and tb
4) tb harness plug

[GWerks]

Calibrate it

[estoniancartel]

Calibrate it

X2. Mine was dying and failed the calibration, although I also had throttle valve controller malfunction and throttle body fault in basic settings dtcs, which you don't.

[slowrideBC]

hmmm are you guys saying I can try to calibrate my throttle body in vag com? and if it fails calibration its obviously dead,,,

[Smitty2A4]

hmmm are you guys saying I can try to calibrate my throttle body in vag com? and if it fails calibration its obviously dead,,,

Yes you should be able to calibrate it via VAG-COM and just to add I have had issues with the EPC light coming on and the car loosing all power a few times. One time it was due to a boost leak with my drivers side lower intercooler hose, it eventually popped off completely and the car cut out, I replaced my silicone hose with a longer one and it has been fine since. The second time it happened was somewhat recently and it was after getting the car re-tuned. This time it turned out to be my MAF, basically my MAF isn't 79mm straight through it is slightly smaller then opens up to 79mm, so once he adjusted the tune to my MAF I have not had an issue.

[SomeDayAS4]

Not sure what to look at my EPC light is currently on but some times it goes out for a couple days then comes back.

Symptoms- car runs fine taking it easy and just normal driving.
IF you try to accelerate hard rpm spikes but not change in acceleration then itll drop pick up speed, rpm spike (increase in Rpm no motion) drop down and pick up where it left off.

[zillarob]

You did your mods in the wrong order. VCDS cable comes before all the stuff in your sig, maybe even the car

[SomeDayAS4]

Well i have access to a cable so i was thinking of trying a throttle Body alignment.

[zillarob]

I think it pretty much does that every time you turn the key on.
The codes are what you are going to want to look for.

[SomeDayAS4]

I think it pretty much does that every time you turn the key on.
The codes are what you are going to want to look for.

i was reading else where that it doesnt actually align its self when the key is in the on position....

[slowrideBC]

i had a tune from some on nefmoto and it was the cause of my EPC light...

got a eurodyne and never had the problem again...it was never my throttle body

[SomeDayAS4]

My EPC light is temperamental, comes and goes as it pleases but the throttle response/clutch/rpm spike issue persists.^^^


first time i ran codes, cleared them.

15 Faults Found:
18057 - Powertrain Data Bus
P1649 - 35-00 - Missing Message from ABS Controller
17530 - Oxygen (Lambda) Sensor Heating; B2 S2
P1122 - 35-10 - Open Circuit - Intermittent
18084 - EPC Warning Lamp (K132) Circuit
P1676 - 35-00 - Electrical Malfunction
17526 - Oxygen (Lambda) Sensor Heating; B1 S2
P1118 - 35-10 - Open Circuit - Intermittent
18098 - Malfunction Indication Light (K83)
P1690 - 35-10 - Electrical Malfunction - Intermittent
17861 - Exhaust Gas Temp Sensor 1 (G235)
P1453 - 35-10 - Open or Short to Plus - Intermittent
17865 - Exhaust Gas Temp Sensor 2 (G236)
P1457 - 35-00 - Open or Short to Plus
17521 - Oxygen (Lambda) Sensor; B1 S1
P1113 - 35-10 - Internal Resistance too High - Intermittent
16955 - Brake Switch (F)
P0571 - 35-00 - Implausible Signal
17870 - Exhaust Gas Temp Regulation for Bank 2
P1462 - 35-10 - Implausible Signal - Intermittent
17952 - Angle Sensor 1 for Throttle Actuator (G187)
P1544 - 35-10 - Signal too Large - Intermittent
16622 - Manifold Pressure / Boost Sensor (G31)
P0238 - 35-10 - Signal too High - Intermittent
17580 - Angle Sensor 2 for Throttle Actuator (G188) Signal too Low
P1172 - 35-10 - - Intermittent
16490 - Manifold / Barometric Pressure Sensor (G71) / (F96)
P0106 - 35-10 - Implausible Signal - Intermittent
16500 - Engine Coolant Temp. Sensor (G62)
P0116 - 35-10 - Implausible Signal - Intermittent
Readiness: 0010 0000
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8D0-820-043-1D.lbl
Part No: 8D0 820 043 Q
Component: A4 KLIMAAUTOMAT D58
Coding: 00160
Shop #: WSC 63351
VCID: 2E592BCDEA6C336E36F-258E
2 Faults Found:
00779 - Outside Air Temp Sensor (G17)
30-10 - Open or Short to Plus - Intermittent
00792 - A/C Pressure Switch (F129)
31-00 - Open or Short to Ground
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8D0-959-655-AI8.lbl
Part No: 8D0 959 655 G
Component: Airbag Front+Kopf 2002
Coding: 00304
Shop #: WSC 20211
VCID: 3A71179D2624EFCE9A7-517A
1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent
Address 35: Centr. Locks Labels: 8D0-862-257.lbl
Part No: 8L0 862 257 N
Component: CV-Pump, Alarm, RC D16
Coding: 16232
Shop #: WSC 63351
VCID: 4085657540F8B51ED43-4ECE
2 Faults Found:
01367 - Central Locking Pump Run Time Exceeded (Likely Leak)
35-00 - -
01370 - Alarm triggered by Interior Monitoring
35-00 - -
-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00101
Shop #: WSC 63351
VCID: E0C505F56038551E743-4B36
1 Fault Found:
01383 - Alarm triggered by Anti-Theft Sensor; Front Right
35-00 - -


these came back after 2miles
Car has no rear 02s, no cats, i know epc and abs are on i have those disconnected will i get a new abs module.

Address 01: Engine Labels: 078-907-551-AZA.lbl
Part No: 8D0 907 551 H
Component: 2.7l V6/5VT G 0003
Coding: 06711
Shop #: WSC 02629
VCID: 2F6736C9ED663A663D9-5140

7 Faults Found:
18057 - Powertrain Data Bus
P1649 - 35-00 - Missing Message from ABS Controller
17530 - Oxygen (Lambda) Sensor Heating; B2 S2
P1122 - 35-10 - Open Circuit - Intermittent
17526 - Oxygen (Lambda) Sensor Heating; B1 S2
P1118 - 35-10 - Open Circuit - Intermittent
17861 - Exhaust Gas Temp Sensor 1 (G235)
P1453 - 35-00 - Open or Short to Plus
17865 - Exhaust Gas Temp Sensor 2 (G236)
P1457 - 35-00 - Open or Short to Plus
16955 - Brake Switch (F)
P0571 - 35-00 - Implausible Signal
17521 - Oxygen (Lambda) Sensor; B1 S1
P1113 - 35-10 - Internal Resistance too High - Intermittent
Readiness: 0010 0100

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8D0-820-043-1D.lbl
Part No: 8D0 820 043 Q
Component: A4 KLIMAAUTOMAT D58
Coding: 00160
Shop #: WSC 63351
VCID: 2E592BCDEA6C336E36F-258E

1 Fault Found:
00792 - A/C Pressure Switch (F129)
31-00 - Open or Short to Ground

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8D0-959-655-AI8.lbl
Part No: 8D0 959 655 G
Component: Airbag Front+Kopf 2002
Coding: 00304
Shop #: WSC 20211
VCID: 3A71179D2624EFCE9A7-517A

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8D0-920-xxx-17.lbl
Part No: 8D0 920 981 BX
Component: B5-KOMBIINSTR. VDO D17
Coding: 02262
Shop #: WSC 05140
VCID: 830F2A79916EEE06091-5122

No fault code found.


-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 8D0-862-257.lbl
Part No: 8L0 862 257 N
Component: CV-Pump, Alarm, RC D16
Coding: 16232
Shop #: WSC 63351
VCID: 4085657540F8B51ED43-4EEA

No fault code found.

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00101
Shop #: WSC 63351
VCID: E0C505F56038551E743-4B4E

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4B0-907-357-AUT.lbl
Part No: 4B0 907 357
Component: LEUCHTWEITEREGLER D004
Coding: 00012
Shop #: WSC 63351
VCID: E5CB14E17F1A3036875-51B6

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 8D0-035-1xx-56.lbl
Part No: 8D0 035 195 A
Component: Radio D00
Coding: 00201
Shop #: WSC 00003
VCID: 244DC9E5B4A0893ED0B-4B1C

No fault code found.

End ---------------------------------------------------------------------

[zillarob]

Holy moley! You have a soldered chip ecu?

[SomeDayAS4]

Holy moley! You have a soldered chip ecu?

I believe its a flash? but i bought the revo tune second hand so may not even be a revo. (has a revo st2 written on it and a sticker)

[zillarob]

I think revo is a flash so should be good there.
Id say fix the obvious stuff (or a new flash with code outs) and work your way up.

[SomeDayAS4]

I think revo is a flash so should be good there.
Id say fix the obvious stuff (or a new flash with code outs) and work your way up.

I figure its either clutch slipping Or something throttle or tune related.

[zillarob]

Whatever it is you got some work to do.
That thing cant be running very well, some of those codes are ones the ecu dont like.

[SomeDayAS4]

Car idles great runs great when not WOT.
Ran terrible for a day when the icm died besides that it's been just fine

[zillarob]

Not sure if revo has changed things, but the egts will put you in limp and maybe dump fuel.
The same for the B1 S1 o2, but that is at least intermittent.
The brake switch can do funny stuff, like cut out the throttle.

[SomeDayAS4]

hmm. Thanks for all the info, My spring break starts on friday so ill have all week to mess around with the car and try and fix some of those codes.