The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2020 Macan S - PCM Freezing & Apple CarPlay Disconnecting

0

Mike T. · rep 0 · May 24, 3:56 PM · 1 replies · solved · Question

Vehicle: 2020 Porsche Macan S

Hey everyone,

I'm having some frustrating issues with the PCM in my 2020 Porsche Macan S. Lately, it's been freezing up completely, sometimes for a minute or two, and then it might reboot itself. This happens seemingly at random, not tied to any specific app or function.

More annoyingly, my Apple CarPlay connection keeps dropping out. I'll be navigating or listening to music, and suddenly it just disconnects. Sometimes it reconnects on its own after a few seconds, other times I have to unplug and replug my iPhone. I've tried multiple cables, including the official Apple one, and restarted my phone countless times.

Has anyone else experienced similar problems with their Macan's infotainment system? It's really impacting the driving experience. I'm wondering if this is a known software bug or something more serious.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 24, 3:56 PM

0

ClearTheCode admin answer:

Intermittent PCM freezing and Apple CarPlay disconnections are common complaints for many modern vehicles, including some Porsche models. Here's a breakdown of potential causes and steps you can take:

  1. Soft Reset the PCM:
    • Hold down the PCM's power/volume knob for about 10-20 seconds until the system reboots. This is similar to restarting a computer and can often resolve minor software glitches.
  2. Check Cables and USB Ports:
    • Ensure you're using high-quality, MFi-certified (Made for iPhone) USB cables. Cheap or damaged cables are a frequent cause of connection issues.
    • Inspect the USB port in your Macan for any debris or damage. A can of compressed air can help clear out dust.
  3. Update iPhone Software:
    • Make sure your iPhone is running the latest iOS version. Sometimes compatibility issues arise with older phone software.
  4. PCM Software Update:
    • The most common underlying cause for persistent issues like this is outdated PCM software. Porsche periodically releases updates that address bugs, improve stability, and enhance connectivity.
    • Causes: Software bugs, corrupted system files, communication errors between the PCM and connected devices, or even a failing internal component within the PCM module.

When to See a Shop: If the soft reset and cable checks don't resolve the issue, it's time to visit a Porsche dealership or a qualified independent specialist. They have specialized diagnostic tools (like PIWIS) that can:

  • Check for Diagnostic Trouble Codes (DTCs): While direct OBD-II codes for 'CarPlay not working' are rare, the system might log U-codes (network communication errors) or B-codes (body electrical faults) related to the PCM or its associated modules.
  • Perform a thorough diagnosis: They can identify if the issue is software-related, a faulty USB hub, or a more serious problem with the PCM unit itself.
  • Update PCM Software: They can flash the latest software version to your PCM, which often resolves these types of intermittent electrical and connectivity problems. This is usually the first step they will take.
  • Hardware Inspection: In rare cases, the PCM module or its components might be failing and require replacement.
Menu

Help & account