Editing On-board diagnostics (section)

===EOBD===
The European on-board diagnostics (EOBD) 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 {{cvt|2500|kg|lb|disp=comma}} or less) first registered within EU member states since January 1, 2001 for [[petrol]]-engined cars and since January 1, 2004 for [[Diesel fuel|diesel]] engined cars.<ref>{{cite web |url=http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:31998L0069:EN:HTML |title=Directive 98/69/EC of the European Parliament |publisher=Publications Office of the European Parliament}}</ref>

For newly introduced models, the regulation dates applied a year earlier – January 1, 2000 for petrol and January 1, 2003, for diesel.<br />
For passenger cars with a Gross Vehicle Weight rating of greater than 2500&nbsp;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 are 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.<ref>{{Cite web |title=Blog {{!}} Indramat USA |url=https://indramat-usa.com/blog/rexroth-fault-codes |access-date=2023-10-27 |website=indramat-usa.com}}</ref> 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.<ref>{{Cite web|url=http://www.obd-codes.com/trouble_codes/|title=OBD-II Check Engine Light Trouble Codes}}</ref>