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, find the tools in classic car marketplace online, for all types of cars. 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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