Porsche PADM Diagnosis: Service Required Warning Decoded (991/992/718)

Porsche PADM Diagnosis: Service Required Warning Decoded (991/992/718)

If you own a Porsche 911 (997, 991, or 992) or a Boxster / Cayman (981, 982, or current-generation 718) and you've recently seen a "PADM Disabled — Service Required" warning on the dashboard, you're not alone. This is one of the most-searched Porsche fault patterns on owner forums, and the workshop diagnosis you'll get for it is almost always incomplete.

This guide is written for Porsche owners — not technicians — and walks through what the warning actually means, the symptoms that go with it, why it keeps coming back even after a workshop replaces the engine mount, and what the permanent fix looks like.

What is PADM and why does the warning appear?

PADM stands for Porsche Active Drivetrain Mount. It's the active engine mount system fitted to performance-focused Porsche models — including most 991/992 911s, 981/982/718 Caymans and Boxsters, and certain Panamera and Cayenne variants. The mount uses an internal magnetorheological fluid that stiffens when an electric current is applied. In Sport and Sport Plus modes, the engine mounts firm up; in Normal mode, they soften for comfort.

To know what to do, the controller needs accurate position and acceleration data from a small sensor inside each active mount. When that sensor sends an out-of-range signal, the controller throws a fault code, defaults the mount to passive mode, and lights the dashboard warning.

The warning typically reads as one of:

• "PADM Disabled — Service Required"

• "Active Drivetrain Mount Fault"

• "Service Required" combined with a Check Engine Light

In PIWIS, the matching fault codes are usually 001013 (front mount) and 001023 (rear mount), though exact numbering can vary by model year.

Common symptoms — in the words owners actually use

Most Porsche drivers don't think in terms of "PADM sensor failure." They notice the car behaving differently. Here are the descriptions that come up over and over on Rennlist, 6SpeedOnline, and Reddit r/Porsche:

• "My 992 is jittery in Sport Plus mode." Engine mount stays passive, so under hard acceleration the engine actually moves more than it should.

• "There's a vibration at idle that wasn't there when I bought the car." With the active dampening disabled, raw engine vibration transmits straight into the chassis.

• "The check-engine light keeps coming back, even after the dealer cleared it." Without the mechanical fix, the fault re-trigers on the next cold start.

• "My workshop replaced the engine mount and the warning came back two months later." This is the giveaway that you've hit the real PADM failure mode.

• "The car feels looser at the limit than it used to." Active mounts firming up under cornering load is part of what makes a 991 GT3 or 718 GT4 feel as planted as it does. When the system reverts to passive, you lose that.

If even two or three of these match your situation, the next step is a code read.

Confirming the diagnosis at home

You don't need a dealer to confirm a PADM sensor fault. You need:

• An OBD2 scanner that can read Porsche-specific codes (Durametric, OBDeleven, Autel MS906, or genuine PIWIS)

• About 15 minutes

• Your VIN handy, in case the codes need to be looked up against a Porsche service database

Plug in, read fault codes, and look for any of the following:

• 001013, 001023, or any "engine mount sensor" fault

• Generic "PADM control module" faults

• Any code referencing the active drivetrain system

A clean code read with no PADM-specific fault points to a different problem — possibly a wiring fault or a controller issue. But for the symptoms above, a sensor fault is the overwhelmingly most common cause.

Why factory engine mounts keep failing — the real root cause

This is the part that's missing from most workshop conversations.

Inside each Porsche active engine mount is a small measuring chip that detects mount position and movement. From the factory, this chip is held in place with adhesive. Glued. That's it.

Engine bays are some of the harshest environments a sensor can live in: high temperatures, constant vibration, oil mist, magnetic-fluid pressure cycles. Over time — usually somewhere between 60,000 and 120,000 miles — the adhesive degrades and the chip detaches. Once it's loose, the chip still sends signals, but they're wrong. The controller logs a fault, throws the warning, and reverts to passive mode.

Here's the catch: most replacement engine mounts you buy use the exact same flawed sensor design. Whether the part comes from a Porsche dealer or an aftermarket supplier, the chip is glued the same way it was originally. So the workshop replaces the mount, the warning goes away for a few weeks or months, and then the new sensor fails the same way.

That's why so many owners report cycling through two, three, even four engine mount replacements over the span of a few years.

The permanent fix — reinforced sensor design

The path out of this loop is a replacement sensor that doesn't replicate the factory's flawed mounting method.

The WAERBODE Black Edition PADM sensor (which we sell at Innovative Soft) was designed specifically to address this failure point. The differences are mechanical:

• Pin-mounted measuring chip, not glued. The chip is mechanically secured to the housing — vibration and heat cycles can't detach it.

• CNC-machined aluminum housing, replacing the original cast housing for better tolerance and heat dissipation.

• OEM-compatible calibration, so the controller still receives the signals it expects — no PIWIS coding required.

• Plug-and-play installation. The sensor is a direct fit for OEM part numbers 001013 and 001023; the original mount housing stays in place.

• 2-year replacement warranty, because we expect it to last.

For Porsche 911 (997 / 991 / 992), 718 Cayman / Boxster (981 / 982), and equivalent active-mount models, this is the part to fit if you're tired of re-diagnosing the same warning.

You can read the technical writeup and order direct here: [WAERBODE Black Edition PADM Sensor for Porsche 911 / 718](https://www.innovativesoftnz.com/product-page/padm-error-fault-991-981-982-718-997).

What about UK customers?

We partner with Ninemeister as our official UK distributor. For UK sales, installation, and support, contact Ninemeister directly at ninemeister.com. They install the same Black Edition sensor and can handle your car end-to-end.

Frequently asked diagnostic questions

Can I keep driving with the PADM warning on?

Yes — your engine mounts default to passive mode and the engine is still securely held. You'll lose Sport Plus damping behaviour and notice more vibration, but the car is safe to drive. Replace the sensor at your earliest convenience to restore the full driving feel.

Will the workshop charge me again if the warning comes back after a replacement?

Almost always, yes. Each diagnostic visit is billed separately, and parts warranties on cheap replacement mounts are typically 6 months. This is part of why the cycle is so expensive over time.

Does this happen on every Porsche?

Only Porsche models with active engine mounts (option code I+M, fitted with Sport Chrono Package or higher trims). If your 911 or 718 doesn't have Sport Chrono, you likely have passive mounts, and PADM faults don't apply.

Can I install the new sensor myself?

If you're comfortable with engine bay work and have access to basic hand tools, yes. The sensor swap takes about an hour. No PIWIS coding is required — the new sensor is a direct calibration match.

How do I know which mount is failing — front, rear, or both?

Read the fault code. 001013 typically points to the front mount; 001023 to the rear. On many cars both fail within months of each other, so plan to replace both at the same time if your budget allows.

Action plan

If you've confirmed a PADM fault on your Porsche:

1. Read the codes with any Porsche-capable OBD2 scanner.

2. Check our [Black Edition PADM sensor product page](https://www.innovativesoftnz.com/product-page/padm-error-fault-991-981-982-718-997) to confirm fitment for your model and year.

3. Order the sensor — we ship worldwide, and UK orders go through Ninemeister.

4. Install in your own garage or at your trusted Porsche specialist. Plug-and-play, no coding.

5. Clear the codes with your OBD2 tool. The warning won't come back.

If you're stuck between buying yet another OEM-style replacement mount and trying a redesigned sensor — the design difference is what determines whether you fix this once or keep paying for it.

Questions about your specific car? Send your VIN and we'll confirm the right part for your build.

Key Takeaways

• What happened: On Porsche 911 models 997, 991, and 992 and Boxster or Cayman models 981, 982, and 718, the "PADM Disabled — Service Required" warning appears when the Porsche Active Drivetrain Mount controller detects an out-of-range signal from a sensor inside an active engine mount, commonly logged in PIWIS as fault code 001013 or 001023.

• Why it matters: When PADM is disabled on a 991 or 992 911, the engine mount defaults to passive mode, which can make the car feel jittery in Sport or Sport Plus and reduce the sharper drivetrain control Porsche intended under hard acceleration.

• What to do next: If you own a 718, 981, 982, 991, or 992 and see this warning, ask the shop to perform a proper Porsche PADM diagnosis with PIWIS, confirm whether the front or rear mount sensor is at fault, and avoid approving a simple mount replacement without verifying the root cause of recurring 001013 or 001023 faults.

FAQ

Can I keep driving my Porsche with a PADM Disabled warning?

Yes, the car will usually remain drivable because the active mount defaults to passive operation when the fault is detected. You should avoid repeated hard driving in Sport or Sport Plus until the fault is diagnosed, because the mount is no longer changing stiffness as intended.

Will replacing the entire engine mount always fix fault codes 001013 or 001023?

Not always. On many 991, 992, 981, 982, and 718 cases, the recurring fault is caused by the internal PADM sensor rather than the rubber-hydraulic mount body itself, which is why the warning can return after a full mount replacement.

What do fault codes 001013 and 001023 mean on Porsche PADM?

These codes typically point to an implausible or out-of-range signal from the PADM position or acceleration sensor inside the active engine mount. In practical terms, 001013 is usually associated with the front mount and 001023 with the rear mount, though exact labeling can vary by model year and PIWIS version.