ironduke

i've had my '03 b6 a4 1.8tq for years, but only recently got a vag-com. the below are some of the fault codes it pulled (there are others, but these seemed the most serious ones). i got vag-com because the MIL (check engine light) and EPC lit up. the EPC no longer lights up, but the MIL does. the airbag light comes on intermittently. (the last time the codes might have been cleared was a year ago, when it was last at the dealer.)

i don't really know what the below codes mean, or what it would take to fix each. can anyone offer some insight? thanks in advance!


Address 01: Engine
Controller: 8E0 909 518 AF
Component: 1.8L R4/5VT G 0001
Coding: 0016701
Shop #: WSC 63351
4 Faults Found:
18062 - Please check DTC Memory of Instrument Cluster
P1654 - 004 - No Signal/Communication - Intermittent
17978 - Engine Start Blocked by Immobilizer
P1570 - 008 - Implausible Signal - Intermittent
16705 - Engine Speed Sensor (G28): Implausible Signal
P0321 - 002 - Lower Limit Exceeded - Intermittent
16706 - Engine Speed Sensor (G28): No Signal
P0322 - 004 - No Signal/Communication - Intermittent
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 15: Airbags
Controller: 8E0 959 655 C
Component: Airbag 8.4EP 2000
Coding: 0010607
Shop #: WSC 63351
2 Faults Found:
01221 - Crash Sensor Side Airbag: Driver Side (G179)
012 - Electrical Fault in Circuit
01221 - Crash Sensor Side Airbag: Driver Side (G179)
011 - Open Circuit - Intermittent

lyleswk

A link to a list of the codes and some info on them. Not a perfect list, but a place to start.

http://wiki.ross-tech.com/wiki/index...P0471%2F001137

My understanding of the codes you noted is as follows. Also note that the ones you listed are all "intermittent" which I think means these are not what is causing the MIL to light up. anyway:

18062: telling you that you need to check the codes under the Instrument Cluster Module.
17978: means the immobilizer didn't allow the car to start at least once; probably related to the item above. I wouldn't worry about these 2.

Last 2 are the ESS. This is the sensor that tells the ECU how fast the engine is turning. If this fails, the car will simply not start. Again, intermittent and probably not causing the MIL.

newaks

Need help with codes:

6 Faults Found:

17979 - Left Engine Mount Solenoid Valve (N144): Short to Plus

P1571 - 001 - Upper Limit Exceeded

17985 - Shareware Version. To Decode all DTCs

P1577 - 004 - Please Register/Activate

16684 - Shareware Version. To Decode all DTCs

P0300 - 001 - Please Register/Activate

16688 - Cylinder 4: Misfire Detected

P0304 - 001 - Upper Limit Exceeded

17718 - Shareware Version. To Decode all DTCs

P1310 - 001 - Please Register/Activate - Intermittent

16537 - Shareware Version. To Decode all DTCs

P0153 - 002 - Please Register/Activat

I know what is the 17979 and 16688! Need information about the other ones...

lyleswk

Quick version; when was the last time you changed the coilpacks?

P1571 - Left Eng. Mount Solenoid Valve Short to B+; not sure about this one.
P1577 - Right Eng. Mount Solenoid Valve Open circuit; not sure about this one.
P0300 - Cyl 1 Misfire
P0304 - Cyl 4 Misfire
P0153 - O2 Sensor. I would simply clear this after you address the misfire. It is probably a sympathetic fault.

newaks

Ok, thanks!
Quess I still have to change the ignition coil, because the engine not running smoothly. And then clear codes and do new run for codes.

newaks

Changed ignition coil/spark plug and it`s running great again!
Thanks for help!