I just bought my A8 and already have a problem

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I just bought my A8 and already have a problem

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I just bought my A8 and already have a problem - 2/24/2008 11:36:55 AM

koop

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Joined: 2/24/2008
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P0302 Cyl 2 misfire
P0137 low voltage bank 1 sensor 2. Sounds like an 02 issue to me, but I am very new to these cars. Guy at checker suggested plugs, but I doubt that it's it as to the second code. Allthough I'd be willing to give it a try. What plugs are recomended?

The symptoms are a rather rough idle and rough during low to mid RPM ranges.

Please help a newbie out. I look forward to learning a lot and helping out where I can.

Jesse

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RE: I just bought my A8 and already have a problem - 2/24/2008 2:58:56 PM

koop

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So I checked the plugs and they had a bit of carbon build up but nothing out of the normal. I replaced them because they looked like they could be replace even though I didn't think it was the culprit. I cleared the codes again and the P0302 Cyl 2 misfire came right back and the car still shutters a little. The odd thing is the P0137 code did not come back and I could not get it to come back. Any ideas what to do next?

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97 Audi A8

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RE: I just bought my A8 and already have a problem - 2/24/2008 10:34:29 PM

auditech79

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From: Sacramento, CA
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Most likely the ICM like i replied in your other post. Try swapping the ICM connectors and see if the miss-fire moves to a different cylinder. It should move to cylinder number 6 if it was missing on 2.

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00 A4 1.8T

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RE: I just bought my A8 and already have a problem - 2/25/2008 6:42:24 AM

koop

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I tried swaping around the coil packs and the prob was still cyl 2. Where are the ICMs on this vehicle. I looked it up so I know what it looks like, but I don't have a shop manual yet.

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RE: I just bought my A8 and already have a problem - 2/25/2008 1:55:39 PM

koop

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Well good news and bad. It was the ICM I found it and the engine is running smooth as butter with no codes. I think it may actually be running smoother than before with the new plugs. The down side is driving around this afternoon my right from ball joint snapped. Luckily I was not going fast the damage to the fender is minimal. Needless to say that it's been a rough first few days in the world of thing Audi. Please pray that other than the control arm nothing else is severely wrong with my car! I would really like to enjoy it!

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97 Audi A8

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RE: I just bought my A8 and already have a problem - 3/22/2008 8:21:38 AM

koop

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So the problem came back.... it's not misfiring, but it's throwing a low voltage code on #2 again. Anyone think I got a faulty ICM or could it be something else.

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RE: I just bought my A8 and already have a problem - 3/24/2008 2:58:32 PM

auditech79

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I would have someone do an electrical check on all those wires from the ECM to the power output stages (ICM's)

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00 A4 1.8T

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RE: I just bought my A8 and already have a problem - 3/24/2008 6:46:40 PM

koop

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Thanks for the reply,
What wires are you speaking of? Any chance you have a wiring diagram? I've got a dmm and am very comfortable checking myself. I just have not gotten my bently repair manual and vagcom yet so I don't have the diagram to look up what output block on the ECM I'm looking for. I could trace the wires all the way back from the ICM, but that would be a royal pain and, I really don't want to spend that much time out of my busy sked.

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97 Audi A8

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RE: I just bought my A8 and already have a problem - 3/25/2008 7:19:50 PM

auditech79

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You would need a tool called a pin out box (which you can't get) to plug into the harness where the ECM does. Without that it doesn't matter if you had the wiring diagram. The dealer is gonna have to diagnose this.

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RE: I just bought my A8 and already have a problem - 4/1/2008 11:35:36 AM

koop

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I can't believe I didn't think of this earlier, but could it just be the iginition wires?

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RE: I just bought my A8 and already have a problem - 4/1/2008 11:53:00 AM

turbo kraut

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koop....... tech is a pretty nice and knowledgeable guy...... i would just do as he suggests..... it might cost you $60 to get it diagnosied, then you just fix the problem yourself

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S4 bumper coming soon:)

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RE: I just bought my A8 and already have a problem - 4/2/2008 6:24:19 AM

koop

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I can't disagree with you. He seams like a stelar gentleman. I'm not copmmletely sure why I'm so disguseted with the idea of taking my car to the dealer. I just feel like I'll walk out with my wallet missing. I have Friday off and I may very well take it in and see if they can check really quick for me. Otherwise I may end up moving some parts around to try to diagnose it as much as I can.

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97 Audi A8

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RE: I just bought my A8 and already have a problem - 4/2/2008 7:37:31 AM

turbo kraut

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From: Des Peres, Mo
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hey, i have no problem trying things, but when all else fails and i don't wanna throw anymore money at something...... let them charge like 60 bucks talk to the guy doing the diagnosis........ and alot of times he will show you what is broke

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S4 bumper coming soon:)

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RE: I just bought my A8 and already have a problem - 4/9/2008 3:21:03 PM

koop

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Problem is sorted. Thanks for the help..... Now I just need to fix the o2 code. anyone know which sensor it is off hand?

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RE: I just bought my A8 and already have a problem - 4/9/2008 3:42:48 PM

auditech79

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What was the problem with the miss-fire?

The O2 sensor you want is the passenger's side after cat O2 sensor. Bank 1 sensor 2.

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00 A4 1.8T

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RE: I just bought my A8 and already have a problem - 4/10/2008 5:08:18 AM

koop

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There was something in the conector. It was simply a bad connection. I was switching the ICMs and I figured I would take a look. It was a brown greasy/dusty substance. I'm guessing it was just inhibiting the connection which is why it wasn't really misfiring consistantly after it was reaplaced, but it was still throwing low voltage. Good lesson to always clean your contacts when you do anything electrical. Thanks for the help again.

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97 Audi A8

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