| Fault or component | Models affected | Typical symptom | Typical repair |
|---|---|---|---|
| Ignition coils and plugs | 996, 997, 986, 987 | Misfire, rough idle | Coils and plugs replaced |
| Air-oil separator (AOS) | Boxster, Cayman, 911 | Startup smoke, lean codes | AOS replacement |
| Secondary air injection | 996, Cayenne 955 | Cold start warning light | Pump or valve replacement |
| PDK fault memory | 997.2, 981, 991, Macan | Harsh shifts, gearbox warning | Guided diagnosis, fluid service |
| Air suspension compressor | Cayenne, Panamera, Macan | Car sits low overnight | Compressor or strut, recalibration |
| Coolant pipes | Cayenne 955 V8 | Coolant loss under manifold | Uprated pipe replacement |
| Wheel speed sensors | All models | PSM failure warning | Sensor replacement, calibration |
| VarioCam actuation | 996, 997 | Rattle, timing codes | Solenoid or tensioner repair |
| Battery and drain faults | All models | Flat battery, undervoltage codes | Drain test, battery coded |
A generic reader only sees the engine's OBD data. A modern Porsche has dozens of control units for the gearbox, chassis, suspension and body, and most of their faults never appear on a basic scan. PIWIS reads every module, follows the same guided test plans a Porsche Centre uses and lets us code and calibrate components after repair. That is the difference between finding a fault and guessing at it.
Yes. When your car is with us we check the VIN for open workshop campaigns and service actions. If we find one that Porsche should be carrying out at their cost, we tell you before doing any related work, so you are not paying for something the factory would put right.
No. With PIWIS we can read the transmission control unit directly, check clutch adaptation values, temperatures and stored faults, and road test the car to confirm what is happening. Many PDK complaints trace back to causes far cheaper than a replacement gearbox, so a proper diagnosis first is always worth it.
It depends on the light. A flashing check engine light means active misfires that can damage the catalytic converters, so stop driving and call us. A PSM or suspension warning usually means the system has switched off its assistance rather than an immediate danger, but stability and braking behaviour are affected. If the car is in limp mode or showing a red warning, have it recovered rather than driven.
Time. A fault that shows up on the first scan with clear evidence is quick to confirm. An intermittent electrical fault that only appears on the road, or a fault buried behind several unrelated stored codes, takes longer to prove. We agree the diagnostic approach with you first and report back before any repair work is authorised.
Yes. PIWIS gives us access to Taycan control systems in the same way as the rest of the range. Faults involving high-voltage components need particular care, so tell us the symptoms when you book and we will advise on the right approach for your car, including whether it is sensible to drive it to us.
For the manufacturer's new car warranty, no. You are free to have diagnosis and repair work done outside the dealer network provided factory procedures and appropriate parts are used, which is exactly how we work, and we record everything so your history stands up to scrutiny. A Porsche Approved extended warranty is a separate contract with its own servicing conditions, so check its terms before booking and we will advise on what it requires.
Where the hardware supports it, yes. PIWIS allows module coding and enabling of functions after retrofits, along with coding of replacement modules and handling of component protection. Tell us what you want to achieve and we will confirm whether it is possible on your model and year before you commit to anything.