Audi_A4_1.8

Hi All,

2004 Audi A4 1.8 Quattro with 196K. Just bought VAG as my car is misfiring.

My issue VAG COM:View Readiness attached. What are these faults usually indicative of.

Listed below are my scan outputs.

Address 01: Engine
Controller: 8E0 909 518 AK
Component: 1.8L R4/5VT G 0003
Coding: 0016751
Shop #: WSC 63351
5 Faults Found:
17887 - Brake Boost Vacuum System: Mechanical Failure
P1479 - 008 - Implausible Signal
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 001 - Upper Limit Exceeded
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 002 - Lower Limit Exceeded - Intermittent
16685 - Cylinder 1 Misfire Detected
P0301 - 002 - Lower Limit Exceeded - Intermittent
16686 - Cylinder 2 Misfire Detected
P0302 - 002 - Lower Limit Exceeded - Intermittent
Readiness: 0110 0101

-------------------------------------------------------------------------------
Address 02: Auto Trans
Controller: 8E0 927 156 S
Component: AG5 01V 1.8l5VT USA 1212
Coding: 0001002
Shop #: WSC 63351
2 Faults Found:
17095 - Transmission Fluid Temp Sensor (G93): Implausible Signal
P0711 - 003 - Mechanical Failure - Intermittent
18265 - Load Signal: Error Message from ECU
P1857 - 003 - Mechanical Failure - Intermittent

-------------------------------------------------------------------------------
Address 03: ABS Brakes
Controller: 8E0 614 517 A
Component: ABS/ESP allrad 3429
Coding: 04277
Shop #: WSC 06435
1 Fault Found:
01826 - Sensor for Steering Angle (G85): Supply Voltage Terminal 30
35-00 - -

-------------------------------------------------------------------------------
Address 08: Auto HVAC
Controller: 8E0 820 043 AD
Component: A4 Klimaautomat 1219
Coding: 00000
Shop #: WSC 63351
3 Faults Found:
01273 - Fresh Air Blower (V2)
30-00 - Open or Short to B+
00819 - High Pressure Sensor (G65)
07-10 - Signal too Low - Intermittent
00532 - Supply Voltage B+
53-10 - Supply Voltage Too Low - Intermittent

-------------------------------------------------------------------------------
Address 09: Cent. Elect.
Controller: 8E0 907 279 F
Component: int. Lastmodul USA 0517
Coding: 00003
Shop #: WSC 63351
4 Faults Found:
01317 - Control Module in Instrument Cluster (J285)
49-10 - No Communications - Intermittent
01326 - Control Module for Multi-Function Steering Wheel (J453)
49-10 - No Communications - Intermittent
01317 - Control Module in Instrument Cluster (J285)
79-10 - Please Check Fault Codes - Intermittent
00532 - Supply Voltage B+
53-10 - Supply Voltage Too Low - Intermittent

-------------------------------------------------------------------------------
Skipping Address 15-Airbags

-------------------------------------------------------------------------------
Address 16: Steering wheel
Controller: 8E0 953 549 N
Component: Lenksáulenmodul 0308
Coding: 00041
Shop #: WSC 63351
1 Fault Found:
00532 - Supply Voltage B+
53-10 - Supply Voltage Too Low - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments
Controller: 8E0 920 950 L
Component: KOMBI+WEGFAHRS. RB4 D36
Coding: 03200
Shop #: WSC 08216
WAULC68E34A024216 AUZ6Z0C0126782
No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.
Controller: 8E0 959 433 BB
Component: Komfortgerát T7B 1311
Coding: 11788
Shop #: WSC 63351
2 Faults Found:
01813 - Supply Voltage for Door Controller: Rear Left (J388)
37-00 - Faulty
01814 - Supply Voltage for Door Controller: Rear Right (J389)
37-00 - Faulty

-------------------------------------------------------------------------------
Address 56: Radio
Controller: 8E0 035 195 H
Component: symphony II NP2 0260
Coding: 01001
Shop #: WSC 08192
2 Faults Found:
65535 - Internal Control Module Memory Error
08-10 - Control Limit Surpassed - Intermittent
65535 - Internal Control Module Memory Error
08-10 - Control Limit Surpassed - Intermittent

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

tofast2belast

17887 - Brake Boost Vacuum System: Mechanical Failure
P1479 - 008 - Implausible Signal
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 001 - Upper Limit Exceeded

check the diverter valve for cracks/leaks. this will cause the misfire.

for the brake boost system check hose connected from brake booster to intake and pcv system.

also in regards to the image you provided. that is normal after you clear codes. drive around for some time(~30-40min) and check it. you can leave the laptop in running with vag com monitoring it.

if some continue to say failed then you have an issue.

Audi_A4_1.8

I replaced the DV as it was not holding pressure.
Brake boost check hose is good
Image is ok now all systems are Green - go

Still have an issue with misfiring. The car while idling misfires. Today I started her up and 20 minutes later she started to misfire.

Please advise. Thanks

tofast2belast

on vag com log measuring blocks 002 and 032

whats your maf reading at idle and blocks 032 is fuel trim if its anything greater than 10% you still have a vacuum leak then.

also check the crank breather elbow tube(its below the intake manifold) <- they like to crack like its their job.

and also check the sandwhich PRV valve. <- this one is connected to the turbo inlet tube and the valve cover.

on a B6 its located on the valve cover side, on a B5 its located at the inlet tube.

this valve works by diaphram. if the diaphram is torn or damaged this can too cause a misfire.

another thing to try is pull codes with vagcom and see what cylinder has misfire(is it still 1 and 2)

then swap the coil plugs with the cylinders that are misfiring with other cylinder and see if the misfire follows. if it does then its a coil pack issue.

Audi_A4_1.8

Where is the crank breather elbow tube? I cant seem to locate it. PRV was replaced (2) months ago as it was a disgrace to even look at. New OEM coils and spark plugs were replaced (3) months ago. Still misfiring on 1 and 2. I will do the MAF reading and get back to you. There is an exhaust leak under the car. Would that cause a misfire when idling. Thanks

lyleswk

I believe you are looking for the 90 degree elbow on the right side of the first picture in the link below.
Regardless, good link on AZ about the breather system on the 1.8.

http://www.audizine.com/forum/showth...light=breather

Where is the exhaust leak? If it is behind the second o2 sensor, probably not. If in front, maybe.

tofast2belast

If the exhaust leak was pre cat then it could but if not then no.

Swap fuel injectors 1 & 2 with 3 & 4 and see if it follows