jbrentd

I hate digging up old threads, but I'm having similar symptoms to what is posted in the thread linked below. I'm also having a hard time of finding what the resolution was, if any.

https://www.audiworld.com/forums/sho....php?t=2796173

Anyone else having these issues?

Car will occasionally have a hard time starting (turns over and over before finally starting). Once it's running, the EPC and ESP lights come on, engine idle is very rough (sometime will die), car bucks and surges when you try to drive it. Check engine light comes on. After a while, the car will settle out. After that, the EPC and ESP lights will go away when the car is restarted, but it takes a while for the CEL to go away. When I pull the codes with my vagcom, I get a whole host of codes. Each of them say "Short to Ground - Intermittent" or "Open Circuit - Intermittent".

The problem seems to be happening more frequently and I concerned that it's going to get worse. It's so random and I'm sure I won't be able to get it to do it for the dealer.

Any ideas?

haloguy628

Once the CEL light is triggered it will only go off by itself after certain number of starts and shutdowns. It persists for some time even though the engine is running clean. Codes are retained in the ECU until cleared by VAG-COM.

Post the codes so we can see what's going on.

jbrentd

I'll try and pull them today.

jbrentd

Here are the codes I pulled today...

Wednesday,30,October,2013,09:49:02:01901
VCDS Version: Release 11.11.6
Data version: 20121223



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Address 01: Engine Labels: None
Control Module Part Number: 4F1 910 560 A HW: 4F1 907 560
Component and/or Version: 4.2l V8/4V 0030
Software Coding: 01050009190F0120
Work Shop Code: WSC 42286 444 85842
VCID: 214324A4F8CE87100F5
15 Faults Found:

001112 - Evap System Purge Control Valve (N80)
P0458 - 002 - Short to Ground - Intermittent
004199 - Intake Air Switch-Over Valve (N335)
P1067 - 002 - Short to Ground - Intermittent
005173 - Secondary Air Pump Relay (J299)
P1435 - 002 - Short to Ground - Intermittent
005494 - Right Engine Mount Solenoid Valve (N145)
P1576 - 002 - Short to Ground - Intermittent
005490 - Left Engine Mount Solenoid Valve (N144)
P1572 - 002 - Short to Ground - Intermittent
000258 - Mass Air Flow Sensor (G70)
P0102 - 002 - Signal too Low - Intermittent
005715 - Please check DTC Memory of ABS Controller
P1653 - 008 - - Intermittent
008852 - Fuel Pressure Regulator Valve (N276)
P2294 - 004 - Open Circuit - Intermittent
004763 - Fuel Pressure Regulator Valve; Bank 2 (N276)
P129B - 004 - Open Circuit - Intermittent
000049 - Oxygen (Lambda) Sensor B1 S1: Heating Circuit
P0031 - 002 - Short to Ground - Intermittent
000081 - Oxygen (Lambda) Sensor B2 S1: Heating Circuit
P0051 - 002 - Short to Ground - Intermittent
009217 - EVAP Leak Detection Pump Control Circuit
P2401 - 002 - Short to GND - Intermittent
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 -
000772 - Cylinder 4
P0304 - 001 - Misfire Detected
000055 - Oxygen (Lambda) Sensor B1 S2: Heating Circuit
P0037 - 002 - Short to Ground - Intermittent

Readiness: 0000 0000

haloguy628

Looks like your battery does not have enough charge or the contacts are oxidated. If it's good then try to clean the posts. I would also check the grounding strip.

Check all your fuses also. I found a post on another forum where one of the O2 sensors had internal short and it was throwing similar codes. The posts are related to A4/S4 but that is fine as they are standard VAG codes applying across Audi/VW/Skoda/SEAT cars.

Multiple Short to Ground Codes

Another one:

CEL On - Short to Ground

Did you clear the codes to see if the codes come back?

2008A6

jbrentd - as i had posted in the thread you linked...have you ruled out the electrical relay switches in the top of the engine bay? Sounds like an electrical current issue and a faulty relay will trigger a whole slew of errors at startup.

jbrentd

So, since I bought an extended warranty when I got the car, I figured I might as well use it. Took it to the dealer and they diagnosed three things:

* Engine Relay (probably the same one you are referring to)
* O2 sensor
* bad coil pack

They are covering the O2 sensor and the coil pack under my warranty, but not the relay for some reason. So I am buying the $30 relay to install. Hopefully, I'll be good to go.

gn240z

mine did the same thing. i think its the ground wire. for me, i had the same codes. i cut off the end of the ground at the battery +, and -, area the brown wires..... under the hood. and i pulled on the other ground wires jsut to move them around, but i think its the ground that is in back of the left headlight area on the inner frame, i cleaned this one, and i havent' had the problem since. i did this at the same time, so, i dont know which one it really was.

jbrentd

After being out of town for a couple of days, I went to pick up the car last night. It started right up, but the idle felt rough. So, I drove around the lot once and it was getting worse. Glad it was happening while I was still there because these "come and go" type of issues can be hard to show to the service guy.

Their initial diagnosis was the fuel pump, but we'll see. Glad I bought the extended warranty. I did mention the ground issue noted by gn240z.

jbrentd

just to follow up on this...since the HP fuel pump was replaced I have not had the same issues.