OBD Fault Code Guide: 100 Codes in Plain English

You plugged in a cheap OBD reader, it gave you P0299, and the internet gave you forty conflicting answers. This guide gives you one: what it means, what causes it, how serious it is, and what to do next.

100 of the most common fault codes seen on UK cars, explained by a working mechanic in language a normal person can read.

WHAT'S INSIDE

100 fault codes, each with meaning, likely causes and next steps

A severity rating on every code, so you know whether to drive it or park it

Grouped the way a mechanic thinks: misfires, fuel, oxygen sensors, catalyst, MAF, throttle, cooling, transmission, ABS, network, EVAP, VVT and diesel-specific

Covers petrol and diesel

Quick reference lookup table: find your code in seconds

Works with any OBD2 scanner, from a cheap Bluetooth dongle upwards

WHY THIS AND NOT A FREE LOOKUP

Free code lookups give you a dictionary definition. This gives you the mechanic's answer: which of the possible causes is actually likely on a UK car, and what it will cost you if you ignore it.

WHAT YOU GET

Instant PDF download. Search it, print it, keep it in the van. Yours forever.

MY GUARANTEE

Not worth it? Email me within 7 days for a full refund.

Jamie, Mr Auto Fixer