Reading several fault codes at once

A car almost never gives you a single code. Paste the whole list and we will say not only what each one means, but what they mean together.

A code reference answers about one code. But people bring a list from the garage: «P0171, P0174, P0300». Separately each code leads its own way; together they often mean a single cause.

The new section takes the list as it is — with words, commas and line breaks in it. We find the codes ourselves.

What it tells you

• Both banks lean — the cause is upstream of where the intake splits, not the injectors on one side.
• Misfires in several cylinders — a common cause, not several dead coils.
• A catalyst code next to misfires — fixing it first means paying twice.
• Several codes about one sensor — that is one fault, and the connector is where to start.

Along with that: each code explained, and the symptoms that match more than one code from your list.

It works without scripts

An ordinary form. A tool that breaks on a weak connection is useless exactly where it is needed — in a garage with one bar of signal.

The section is open and free; the app is not needed for it.