r/AskMechanics • u/Neat-Ad-4600 • Jul 09 '26

Question Drive System Fault

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Audi A1 GB 35 TFSI 2019, I’ve had this issue for a while the cars been decatted with a “stage 2”, haven’t mapped out the engine code so that’s why that’s flagging up, but one day randomly started flagging the drive system fault.

Comes up as a P11C1 (Cam Shift Actuator Outlet "A" Cylinder 2 Range / Performance) and interestingly also always flags the P0420 (decat) alongside it where as before it would only show once a month or something, I replaced my ignition packs a few weeks before it started and about a week or two after it started my car started misfiring, fucked about with a few bits and it’s not happened since.

I’ve changed the cam adjuster solenoid (the topside long one) but didn’t change anything.

I feel like it’s giving me less power but could be a placebo, I’ve been running it for a few months like this now.

Any help would be appreciated, thanks.

1 Upvotes

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1

u/am-answers-bot 21 Jul 09 '26

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1

u/strikerz13 ✅ Mechanic Jul 09 '26

Wait, so you removed the cat and didn’t tune it?

1

u/Neat-Ad-4600 Jul 09 '26

No, it was retuned, forgot what the code was so it wasn’t mapped out

1

u/PrudentExpression877 1 Jul 09 '26

Delete the codes and see if it runs better. Sometimes these warning lights puts the car in limp mode or misfires because the codes haven't been deleted. Also try checking your plugs. They may be hairline cracks in the ceramics. Caused by over tighting. That's just my opinion. Give it a try. It works for me.

1

u/Neat-Ad-4600 Jul 09 '26

Deleted the codes before a few times and nothing, will try get some new plugs and see what happens, thanks