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VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

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Old September 23rd, 2019, 16:35   #1
Join Date: Sep 2019
Location: Houston, Tx
Default 2006 Jetta TDI limp mode with AC on

New to the forum. I have not seen anything that might explain the problem I am having with my 2006 Jetta tdi, manual trans.

It runs fine until I turn on AC, then it just goes into limp mode.

If am just parked with engine running, turn on the AC - and everything works. Cool air blowing in. Raise the RPM a bit and it just drops it to around 800.

AC is manual temperature adjustment.

Any help would be appreciated.
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Old September 30th, 2019, 06:40   #2
Join Date: Sep 2019
Location: Houston, Tx


Changed alternator along with the belt and high pressure AC sensor. No changes. I will keep hunting.
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Old September 30th, 2019, 11:33   #3
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crazyrunner33's Avatar
Join Date: Jul 2006
Location: Charlotte, NC

It'll be easier if you buy or rent VCDS buying more parts. VCDS will show you all the logs and what's triggering
limp mode. It'll also read quite a bit of data for the AC.

When searching, I didn't see much MKV experiences for this issue, but a couple people had similar issues with the MKIV.

'06 Jetta DSG: GTB1749VC, PD150 injectors, Malone tune, and some other stuff and things
'97 Cummins: It looks stock, does that count?
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