SPD Forum - SP Support
Generated: 1 October, 2016, 03:09
Audi A4 2.0 FSi AWA engine
Posted by mc1 - 30 Oct 2009 10:54
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Working on a 2003 Audi 2.0 FSi - AWA engine (not covered specifically by ACR4 software but able to
scan without entering specific engine code).
Fault codes are:
19594 Unknown but checked elsewhere - comes up as Intake Manifold Runner Control regulation
deviation.
17480 NOx Sender Heating Contol Signal
16684 Misfiring Recognised Present
16687 Cyl 3 Misfire
16686 Cyl 2 Misfire
16785 EGR System flow insufficient
17912 Air Intake System s/c to another valve
I take it that there is a misfire on at least 2 cylinders, but maybe others as the random misfire fault has
appeared. Also an EGR valve fault & intake possible leak, plus intake regulation flap incorrect position.
The NOx sensor fault may be due to the misfire normally, except the fault for the heating circuit has
appeared therefore it may be a NOx sensor or control box/wiring fault.
My question is, although there may be a few faults listed, I am guessing that most are linked to a single
problem. Anyone out there come across a similar problem on an Audi or VW with an FSi engine?
General driving symptoms are lack of power, misfiring, poor idle, poor fuel consumption, but not all the
time.
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Audi A4 2.0 FSi AWA engine
Posted by mc1 - 30 Oct 2009 10:54
_____________________________________
Working on a 2003 Audi 2.0 FSi - AWA engine (not covered specifically by ACR4 software but able to
scan without entering specific engine code).
1/5
SPD Forum - SP Support
Generated: 1 October, 2016, 03:09
Fault codes are:
19594 Unknown but checked elsewhere - comes up as Intake Manifold Runner Control regulation
deviation.
17480 NOx Sender Heating Contol Signal
16684 Misfiring Recognised Present
16687 Cyl 3 Misfire
16686 Cyl 2 Misfire
16785 EGR System flow insufficient
17912 Air Intake System s/c to another valve
I take it that there is a misfire on at least 2 cylinders, but maybe others as the random misfire fault has
appeared. Also an EGR valve fault & intake possible leak, plus intake regulation flap incorrect position.
The NOx sensor fault may be due to the misfire normally, except the fault for the heating circuit has
appeared therefore it may be a NOx sensor or control box/wiring fault.
My question is, although there may be a few faults listed, I am guessing that most are linked to a single
problem. Anyone out there come across a similar problem on an Audi or VW with an FSi engine?
General driving symptoms are lack of power, misfiring, poor idle, poor fuel consumption, but not all the
time.
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Audi A4 2.0 FSi AWA engine
Posted by roysrs - 31 Oct 2009 13:07
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yes mate i have had at least 8 in with differing degrees of success but i know you sometimes need to
have the ecu recal when certain sensors on inlet manifold have been changed throttle poten being one,
vagcom do software for this
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Audi A4 2.0 FSi AWA engine
Posted by mc1 - 01 Nov 2009 08:55
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Thanks for the info. I have seen elesewhere on the net there is a software update for the Turbo model
2/5
SPD Forum - SP Support
Generated: 1 October, 2016, 03:09
FSi engines, wasn't sure if it was relevant to the non turbo engines. Would be worth getting the customer
to check with Audi re. recalls etc.
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Audi A4 2.0 FSi AWA engine
Posted by mc1 - 03 Jul 2010 17:45
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Update:
Nox Sensor replaced - a hefty £460+VAT approx, Nox sensor fault gone.
Faults still come up as:
19594 unknown fault - could be intake flap fault - strange on as this comes up again after clearing and
turning ignition off then on - even without starting engine.
16785 EGR System present fault
17912 Air Intake system...present...s/c to another valve
Also a misfire on no.2 cylinder occasionally.
Symptoms are poor idling intermittantly and loss of power.
Need to remove the inlet manifold as this is getting very boring - need to check for air leaks or intake flap
malfunction.
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Audi A4 2.0 FSi AWA engine
Posted by Robski - 03 Jul 2010 18:13
_____________________________________
3/5
SPD Forum - SP Support
Generated: 1 October, 2016, 03:09
mc1
not sure if you have already checked these out but ....
19594/P3138/012600 - Intake Manifold Runner Control: Regulation Deviation
Possible Causes
Intake Manifold Runner Control Basic Setting not performed
Wiring from/to Intake Manifold Runner Control faulty
Intake Manifold Runner Control faulty
Possible Solutions
Perform Intake Manifold Runner Control Basic Setting
Check/Repair Wiring from/to Intake Manifold Runner Control
Check/Replace Intake Manifold Runner Control
Special Notes
When found in Engine: 2.0l TFSI, perform Basic Setting
16785/P0401/001025 - Exhaust Gas Recirculation (EGR) System: Insufficient Flow Detected
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Reduced Exhaust Gas Recirculation (EGR)
Reduced Power Output/Engine running rough
Increased Emissions
Possible Causes
Exhaust Gas Recirculation (EGR) Flow restricted/clogged
Exhaust Gas Recirculation (EGR) Valve stuck closed/leaking/faulty
Wiring and/or Connector(s) from/to Exhaust Gas Recirculation (EGR) Valve faulty
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SPD Forum - SP Support
Generated: 1 October, 2016, 03:09
Exhaust Gas Recirculation (EGR) System faulty
Possible Solutions
Check/Clean Exhaust Gas Recirculation (EGR) System
Check/Replace Exhaust Gas Recirculation (EGR) Valve
Check Wiring and/or Connector(s) from/to Exhaust Gas Recirculation (EGR) Valve
foutcode: 17912
P1504
nl Inlaatsysteem
lek ontdekt
du Luftansaugsystem
Leck erkannt
en Intake Air System
Leak Detected
Extra info bij de foutcodes. Intermittent
Mogelijke oorzaken:
Lek in de inlaat
Slangaansluiting(en)
Gasklepregeleenheid
Afzuigsysteem brandstofdamp
EGR systeem
HTH
Rob.
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