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S4 (B6 & B7 Platforms) Discussion Discussion forum for the B6 Audi S4 produced from 2003-2005 And B7 Audi S4 produced from 2005 -2008

S4 died on the road

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Old 08-13-2014, 10:21 PM   #1
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Default S4 died on the road

Hi. This is my first post on this board.

I have a 2004 S4 Avant. Coming home from a relatively hot day, driving in rush hour traffic with heavy AC use, my car died. Luckily it happened as I was pulling off the freeway a few blocks from home. The car just shut off. No CEL or warning. I let it cool down for an hour or so and tried starting it. It turns over, but does not start.

I did some basic troubleshooting, but before replacing parts I decided to get a V-Checker V202 from ECS. I pulled the following codes:

Coolant Fan Control
2: Open or Short to ground

Radiator fan activation
1: Open or short to ground

Power supply (B+ terminal)
30: Low voltage

Did some googling but didn't find my exact issue. I've already checked fuses, charged battery, checked fuel pump, etc. I'll troubleshoot radiator fan/cooling system next.

My question is will a bad fan control interrupt the ignition system, causing my no start condition? Sounds reasonable to do this to protect the engine, but I could find no documentation.

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Old 08-13-2014, 10:21 PM
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