Porsche vehicles also use a set of diagnostic trouble codes (DTCs) to identify potential issues with various systems in the car.

---------------------------As of my last update in September 2021, Porsche vehicles also use a set of diagnostic trouble codes (DTCs) to identify potential issues with various systems in the car. Porsche, being a prestigious sports car manufacturer, uses sophisticated diagnostic systems to assist in diagnosing and troubleshooting problems. The specific codes can vary based on the Porsche model, year, and the type of diagnostic system used. Here are some common Porsche diagnostic trouble codes:

1. P0101 - Mass or Volume Air Flow Circuit Range/Performance Problem

2. P0171 - System Too Lean (Bank 1)

3. P0172 - System Too Rich (Bank 1)

4. P0300 - Random/Multiple Cylinder Misfire Detected

5. P0301 - Cylinder 1 Misfire Detected

6. P0302 - Cylinder 2 Misfire Detected

7. P0303 - Cylinder 3 Misfire Detected

8. P0304 - Cylinder 4 Misfire Detected

9. P0420 - Catalyst System Efficiency Below Threshold (Bank 1)

10. P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

11. P0442 - Evaporative Emission System Leak Detected (Small Leak)

12. P0455 - Evaporative Emission System Leak Detected (Gross Leak)

13. P0507 - Idle Control System RPM Higher Than Expected

14. P1111 - Intake Valve Timing Control Solenoid Valve Circuit Bank 1

15. P1112 - Intake Valve Timing Control Solenoid Valve Circuit Bank 2

16. P1120 - Throttle Position Sensor (TPS) Out of Range

17. P1121 - Throttle Position Sensor (TPS) Signal Inconsistent with Mass Airflow (MAF) Sensor Signal

18. P1130 - Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3)

19. P1133 - Oxygen Sensing Adaptation Area 2 (Cylinders 4 - 6)

20. P1134 - Oxygen Sensing Adaptation Area 3 (Cylinders 7 - 9)

21. P1140 - Mass or Volume Air Flow Circuit Range/Performance Problem

22. P1141 - Load Calculation Cross Check Range/Performance

23. P1151 - Load Calculation Cross Check Range/Performance

24. P1200 - Fuel Pump Relay Circuit Problem

25. P1225 - Fuel Injector Cylinder 1 Short Circuit

26. P1226 - Fuel Injector Cylinder 2 Short Circuit

27. P1227 - Fuel Injector Cylinder 3 Short Circuit

28. P1228 - Fuel Injector Cylinder 4 Short Circuit

29. P1229 - Fuel Injector Cylinder 5 Short Circuit

30. P1230 - Fuel Injector Cylinder 6 Short Circuit

Please note that the specific diagnostic trouble codes can vary based on the Porsche model and the software version of the diagnostic system used. If you encounter any of these diagnostic codes on your Porsche vehicle, it is recommended to have a qualified mechanic or Porsche dealership diagnose and address the specific issue. Using professional diagnostic equipment ensures accurate readings and appropriate repairs.