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audi a4 cab missfire


wes68
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Hi all,im hoping someone out there can help me.My 02 cabriolet has developed an intermittant missfire,very irritating! A friend of mine has done a vagcom sweep on it & came up with a couple of codes: 16684-random/multiple cylinder misfire detected (po300-001-upper limit exceeded-intermittant) & 16686-cylinder 2 misfire detected(po302-001-upper limit exceeded-intermittant) those were on the engine check.Another one came up on the auto hvac check & im curious if they are linked: 00819-high pressure sensor(g65) 07-10-signal too low-intermittant.Any help would be much appreciated. Ian

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Welcome to Tyresmoke +++

What engine is it? If it's a 1.8T it will almost definitely be one or more of the coil packs. Quick to replace and about £25 each. There's one per cylinder.

Its the 2.4 v6,ive replaced the plug leads but it has 3 coils on it. One for each pair of cylinders,any known probs with these?

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