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HELP! flashing CEL. DTC codes 16884 and 16885 Misfires in all cylinders

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Old 12-10-2003, 01:50 PM
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Default HELP! flashing CEL. DTC codes 16884 and 16885 Misfires in all cylinders
pulled up to an intersection and the car just died on me. I started it up and then it began to sputter and I got a flashing CEL. VAG'd it and got DTC codes 16884 and 16885. Coilpacks? vaccuum hoses? ignition amplifier?

99.5 1.8t 5spd

any help appriciated
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Old 12-10-2003, 01:57 PM
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If it's all cylinders...most likely the ignition amp.
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Old 12-10-2003, 02:01 PM
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Sounds like you may have a bad ignition power output stage, but hard to diagnose over the internet
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Old 12-10-2003, 02:02 PM
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can I swap in an ignition amp from a 99 2.8? I have a 99.5 1.8t, I assume they're the same...?
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Old 12-10-2003, 02:04 PM
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no, not the same
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Old 12-10-2003, 02:06 PM
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Default There's only 2 dtc's, can't be all cylinders. Probably only #2.
Then again, we could be way off. Maybe he sucked in a bunch of water!
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Old 12-10-2003, 02:09 PM
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one of the DTCs said Misfires in all cylinders
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Old 12-10-2003, 02:12 PM
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Default as for sucking in water: OEM air box, I'm in Maine, 25 degrees outside...(m)
unless ice on my Kamei grill melted and got sucked in to the airbox, i doubt i could've sucked in that much water...no more than from a normal rain storm.

but if i did suck in water, what's the best way to resolve the situation?
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Old 12-10-2003, 02:13 PM
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damn, thanks though
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Old 12-10-2003, 02:19 PM
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Default to be accurate...
16684 says Random/Multiple Cylinder Misfire Detected (meaning it's either random or multiple)

16685 says Cyl. 1 Misfire Detected

Most people with a failed ignition switch module get a 16686 cyl 2 misfire. but that doesn't mean this isn't your problem.<ul><li><a href="https://forums.audiworld.com/a4/msgs/1594531.phtml">check the module yourself</a></li></ul>
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