OBD2 Fault Codes list – Engine Management Light

OBDII Codes List

OBD2 is a car diagnostics device that plus in to the majority of cars after 1995. You can pick one up from Ebay as little as £5 to get a quick diagnostic on your car. But I recommend getting ones at about £30, that you can plug in to your laptop, it’ll allow clearing codes better and DPF regeneration. You’ll commonly find the ELM327 version and there are about 11000 codes.

There are a standard for the codes so that they can be recognised universally. Here’s an example of a code you should see.


The Prefixes and Categories

P – Powertrain, (i.e. engine and gearbox)
C – Chassis
B – Body
U – User network

Fault Types

0– Generic fault
1 – Manufacturer fault

OBD2 Codes List

There is a generic list of codes but also manufacturers may have their own lists. Generally these are headed with:

0, 1, 2 – Relates to Air or Fuel
3 – Relates to the ignition system
4 – Relates to emissions
5 – Relates to an Idle Engine
6 – On board computer and ancillary outputs
7, 8, 9 – Relates to Transmission/Gearbox
A, B, C – Relates to hybrid propuls

Cars Covered:

  • Acura
  • Audi
  • BMW
  • Buick
  • Cadillac
  • Chevrolet
  • Chrysler
  • Dodge
  • Ford
  • Honda
  • Hyundai
  • Jaguar
  • Jeep
  • Kia
  • Land Rover
  • Lexus
  • Mazda
  • Mercedes-Benz
  • Mini
  • Mitsubishi
  • Nissan
  • Saab
  • Subaru
  • Suzuki
  • Toyota
  • Volvo
  • VW

The following search tool contains all generic codes and all manufacture specific. Just type in your code in to the search box.

OBD2 Codes

List of OBD2 Engine codes

Leave a comment if your code is not listed above

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