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Discussion Starter #1
I got my PSM light to appear with a message to go to the dealer and drive carefully, but it went away after restarting the car and hasn't reappeared. Called the dealer and we set up an appointment to get me on the books but we'll cancel if it doesn't come back before then (two weeks out).

At the time, I was accelerating onto an expressway, maybe hit 6000 rpm in 2nd.


Ausfall PSM Werkstatt aufsuchen
Angepasste Weiterfahrt moglich

IMG_20190916_163726.jpg
 

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I dont think you have a problem. Apparently this alarm is not that uncommon and, best I can tell, including my own experience, clears after a restart.

Immediately after inadvertently stalling my Boxster while backing out of a space recently, the alarm locked in. It stated "PSM failure - Consult a workshop - Drive with caution" and the orange car symbol with skid marks lit by "6" on the tach. I truned it off and immediately restarted it but the alarm remained locked in. However, after arriving home and then restarting it sometime later, the alarm was clear and has remained clear.

From what I read the PSM throws this alarm sometimes if only slightly provoked by a transient only event.
 

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Discussion Starter #3
Well if not at least I'm still under warranty. I'll post again if it comes back in the next couple of weeks.
 

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Just a question, was the on-ramp steeply angled, like more than 30 degrees?
 

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Discussion Starter #5
No, gentle downslope. I'm going to look to see if there could have been some oil or something on to cause traction issues when I drive home tonight.
 

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Discussion Starter #7
Well maybe not a fluke. Second Check Engine Light (ever) showed up yesterday as I was again accelerating on the highway (same highway, different exit).
Störung Motorsteurung Werkstatt aufsuchen Weiterfahrt möglich
I wondered about starting my trip with the light and ending it with Porsche Roadside Service towing me to a dealership with a closed (Saturday) service department and no one there to give me a loaner car, remembered my car insurance should cover the ride-share home and continued the drive.
Car ran fine, engine was smooth, delivered 34.5 mpg on the two hour drive there and 35.4 on the drive home.
The first CEL cleared itself from the display on the first restart and this one hasn't yet.
Fortunately I still have the appointment so I can drop it off on Tuesday morning for diagnosis and have a loaner car (my guess: Macan) ready if the car needs work.

cel.jpg
 

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Discussion Starter #8
Should get more information this week, but the current plan is for the dealer to replace the turbocharger under warranty.
:oops:
 

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Discussion Starter #9
Here are the notes from the replacement. I'm not sure, but I started hearing a fluttering sound from the turbo at acceleration before the lights happened. I also wonder if I could have detected the problem by monitoring the turbo boost pressure (I have the voltage selected on the PCM screen instead). So far so good but I haven't been able to really test out the car yet; too much traffic on the way home from the dealer.

J# 2 01POZZCHECKENG CHECK ENGINE LIGHT TECH(S):15 WARRANTY INVESTIGATE CAUSE OF CHECK ENGINE LIGHT SCANNED ALL CONTROL UNITS FOR FAULTS. CREATE AND UPLOAD "BEFORE REPAIR" VEHICLE ANALYSIS LOG. ACTIVE DME FAULTS - U0418, P0234, P0299, P0105, P0235, P0238. PERFORMED DIAGNOSIS BASED ON GUIDED FAULT FINDINGS - ALL DIAGNOSTIC INFORMATION FOR THESE STORED FAULTS IS POINTING TO A FAILED INTAKE MANIFOLD ABSOLUTE PRESSURE SENSOR/BOOST PRESSURE SENSOR. PUT CONVERTIBLE TOP IN SERVICE POSITION, REMOVED UPPER ENGINE COVER AND AIR FILTER ASSEMBLY. REPLACED INTAKE MANIFOLD PRESSURE SENSOR. ERASED FAULTS AND ROAD TESTED CAR. FAULT CODE P0234 BOOST PRESSURE LIMIT EXCEEDED FAULT RETURNED. RAISED CAR ON LIFT AND VISUALLY INSPECTED TURBOCHARGER VACUUM SYSTEM. ALL VACUUM SYSTEM LINES/HOSES ARE SECURE AND NOT LEAKING. VISUAL/MECHANICAL INSPECTION OF THE TURBOCHARGER WASTE GATE ACTUATING ROD SHOWED THAT THE ROD WAS SEIZED (COULD NOT MOVE BY HAND AT ALL). USING VACUUM TESTER, APPLIED VACUUM TO WASTE GATE - ACTUATING ROD STILL DOES NOT MOVE. FREED UP ACTUATING ROD USING RUST PENETRANT SPRAY AND PRY BAR. NOW ROD MOVES, BUT IT'S NOT A SMOOTH OPERATION - IT STUTTERS WHEN MOVING. APPLIED VACUUM TO WASTE GATE WITH ROD FREED UP - ROD STILL DOES NOT MOVE INPUT TLAR 01570-BGKPQA143050. TLAR RESPONDED WITH "IF THE WASTE GATE IS NOT FUNCTIONING SMOOTHLY, REPLACE THE COMPLETE TURBO. THERE IS NO LUBRICANT THAT WILL CORRECT THIS ISSUE, AND WITHOUT REPLACEMENT THE ISSUE WILL RETURN." REMOVED OIL TANK RESERVOIR AND COMPLETE TURBOCHARGER. REMOVED TURBO FROM EXHAUST MANIFOLD. INSTALLED NEW TURBO ONTO EXHAUST MANIFOLD AND REINSTALLED ALL REMOVED PARTS. REFILLED AND BLED COOLING SYSTEM AND CHECK ENGINE OIL LEVEL. ROAD TESTED CAR, RESCANNED FOR FAULTS. REPAIRS COMPLETE.
PARTS------QTY---FP-NUMBER---------------DESCRIPTION--------------------UNIT PRICE-
JOB # 2 1 9A7-906-051-10 PRESSURE SENSO WARRANTY
JOB # 2 1 9A2-123-021-06 EXHAUST GAS TU WARRANTY
JOB # 2 1 0PC-145-039 GASKET WARRANTY
JOB # 2 1 999-707-387-40 RUBBER O-RING WARRANTY
JOB # 2 1 5Q0-253-115-B GASKET WARRANTY
JOB # 2 7 999-707-692-40 O-RING WARRANTY
JOB # 2 2 999-707-612-42 O-RING WARRANTY
JOB # 2 2 999-707-612-41 O-RING WARRANTY
JOB # 2 2 999-707-688-40 O-RING WARRANTY
JOB # 2 2 982-251-263 GASKET WARRANTY
JOB # 2 4 900-910-003-03 HEXAGON NUT WARRANTY
 

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Moving this thread to the 'Tuning and Turbo' subforum since it has to do with failed waste gate linkage that led to complete turbo replacement.
 
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