The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2018 Macan S - PASM Fault Message & Stiff Ride

0

Chris P. · rep 0 · May 22, 6:43 AM · 1 replies · solved · Question

Vehicle: 2018 Porsche Macan S

Hey everyone,

I'm looking for some advice on my 2018 Porsche Macan S. It's got about 62,000 miles on it, and recently the ride quality has gone downhill significantly. It feels really stiff and harsh, especially over any kind of uneven pavement or bumps.

Yesterday, while driving, a 'PASM Fault' message popped up on the dashboard. I pulled over, turned the car off and on again, but the message reappeared shortly after. The car still drives, but the suspension feels completely rigid.

Has anyone experienced this with their Macan or other Porsche models? What could be causing this PASM fault? Is it safe to continue driving it like this until I can get it into a shop, or should I be concerned about further damage?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 6:43 AM

0

ClearTheCode admin answer:

A 'PASM Fault' on your 2018 Porsche Macan S indicates an issue with the Porsche Active Suspension Management system, which controls the damping force of each wheel individually. A stiff ride often accompanies this fault because the system may default to its firmest setting for safety when a malfunction is detected.

Here's what could be happening and what to do:

  1. Common Causes:

    • Faulty Damper: One or more of the electronically controlled dampers (shocks) could be failing. These are complex components and can wear out over time.
    • Sensor Malfunction: PASM relies on various sensors (e.g., ride height sensors, acceleration sensors) to determine road conditions and driving style. A faulty sensor or its wiring can trigger a fault.
    • Wiring Harness Damage: Rodent damage or general wear and tear to the wiring connecting the PASM control unit to the dampers or sensors can interrupt communication.
    • PASM Control Unit Issue: Less common, but the central control module for the PASM system could be malfunctioning.

  2. Diagnostics:

    • The first step is to get the vehicle scanned with a Porsche-specific diagnostic tool. Generic OBD-II scanners may only show basic powertrain codes (P-codes) and might miss the specific chassis codes (C-codes) related to the PASM system. Look for codes like C1200 (general chassis system fault) or more specific codes pointing to a particular damper or sensor circuit.

  3. When to See a Shop:

    • Immediately: While the car might still be drivable, a compromised suspension system can affect handling, braking, and overall safety. Driving with a persistent PASM fault, especially if the ride is excessively harsh, can put undue stress on other suspension components and tires.
    • Professional Diagnosis: A Porsche specialist or dealership will have the necessary diagnostic equipment to pinpoint the exact cause of the fault. They can perform live data readings, component tests, and check for software updates that might resolve the issue.

It's best to address this promptly to restore your Macan's renowned ride quality and ensure your safety on the road.

Menu

Help & account