Hoping for some perspective from people who know these cars far better than I do. I'll keep names and locations out of it, but I'm happy to share more detail privately with anyone willing to help.
Car: 2010
997.2
Turbo,
PDK
, ~71,500 km. I've owned it about two years and it has been flawless — no warning lights, no boost issues, nothing. It's my first car and I look after it obsessively.
I took it to an official
Porsche
centre for a major scheduled service at ~71,500 km. Per the service record, the work included
spark plugs
, belts off and refitted, battery replacement,
PDK
service with oil sump replacement, an underbody treatment, and a long diagnostic session — which flagged no turbo or boost faults at all.
On the very first proper drive after the service (a longer motorway trip), problems started appearing. Over roughly the
next
few hundred km, in approximately this order:
a light/"dead" zone on-centre in the steering at motorway speed
a rear-right cabin noise on smooth tarmac
noticeably more liquid from the exhaust and much blacker tips
a different cold-start sound
a mechanical noise from underneath, then a metallic resonance around 3,000 rpm and a low hum between roughly 2,000–3,000 rpm
and then, progressively, almost total loss of boost
The key oddity: through all of this,
no warning light and no dash error message.
Here's where it gets frustrating. Initially the centre's position was that none of this could be related to the service because they "hadn't worked in that area." But their own service record shows the work was concentrated exactly around there — belts off and refitted, PDK oil sump, the full underbody treatment, the battery. Only after I pushed did they actually run checks, and at that point they reported a
bent exhaust heat shield
(which they straightened), a wheel rebalance, and then attributed the boost loss to "turbines oxidised with age" and a faulty actuator.
When I pressed further, they shared the PIWIS fault codes — boost-regulator faults on
both banks
: P1084, P1086, P1087, P1089, P1165, P1168, P1256, P0299. They found oil residue on one turbo only. For what it's worth, one of the two turbos was replaced under a previous owner less than four years and under 17,000 km ago.
Throughout, the responses have been slow — sometimes more than ten days between replies — which has made an already stressful situation harder.
What I'd love the community's read on:
Do boost-regulator/actuator codes across
both banks
, appearing together like this, point more toward genuine turbo wear, or toward something on the control/electrical/vacuum side that could be disturbed during work in that area?
Is it plausible for boost to collapse like this with
no dash warning at all
?
Does a
bent
heat shield in that area suggest something was contacted or disturbed underneath during service?
If you were diagnosing this from scratch, what would you want checked first — before anyone starts taking the exhaust and turbos apart?
Has anyone seen a similar cluster of symptoms appear right after a major service?
I'm not here to bash anyone — I genuinely want to understand what's most likely going on so I can make a sensible decision before authorising any irreversible teardown. If anyone with real experience on these cars is willing to go deeper, I'd be very grateful to continue by private message and share more detail, including documentation.
Thanks in advance — this car means a lot to me and I want to get it right.
Thank you
Orlando
Hey
@9972888
, that's a really frustrating situation, having all those problems appear right after a major service on a car that was running perfectly. With the boost faults hitting both banks at once, have they mentioned specifically how they checked all the vacuum lines or connectors that might have been disturbed during the PDK service and underbody work? Adding those details might help some of the pros here point you in the right direction.
