The EOBD (European On Board Diagnostics) regulations are the European equivalent of OBD-II, and apply to all passenger cars of category M1 (with no more than 8 passenger seats and a Gross Vehicle Weight rating of 2500 kg or less) first registered within EU member states since January 1, 2001 for petrol (gasoline) engined cars and since January 1, 2004 for diesel engined cars.
For newly introduced models, the regulation dates applied a year earlier – January 1, 2000 for petrol and January 1, 2003 for diesel.
For passenger cars with a Gross Vehicle Weight rating of greater than 2500 kg and for light commercial vehicles, the regulation dates applied from January 1, 2002 for petrol models, and January 1, 2007 for diesel models.
The technical implementation of EOBD is essentially the same as OBD-II, with the same SAE J1962 diagnostic link connector and signal protocols being used.
With Euro V and Euro VI emission standards, EOBD emission thresholds will be lower than previous Euro III and IV.
EOBD fault codes
Each of the EOBD fault codes consists of five characters: a letter, followed by four numbers. The letter refers to the system being interrogated e.g. Pxxxx would refer to the powertrain system. The next character would be a 0 if complies to the EOBD standard. So it should look like P0xxx.
The next character would refer to the sub system.
- P00xx – Fuel and Air Metering and Auxiliary Emission Controls.
- P01xx – Fuel and Air Metering.
- P02xx – Fuel and Air Metering (Injector Circuit).
- P03xx – Ignition System or Misfire.
- P04xx – Auxiliary Emissions Controls.
- P05xx – Vehicle Speed Controls and Idle Control System.
- P06xx – Computer Output Circuit.
- P07xx – Transmission.
- P08xx – Transmission.
The following two characters would refer to the individual fault within each subsystem.
EOBD2
The term “EOBD2” is marketing speak used by some vehicle manufacturers to refer to manufacturer-specific features that are not actually part of the OBD or EOBD standard. In this case “E” stands for Enhanced.
