Glossary / General

diagnostic trouble codes

16 Episode Mentions
Too Afraid to Ask

When a car’s computer notices something wrong, it gives the problem a code. These codes tell mechanics what part might need fixing.

Technical Definition

Diagnostic trouble codes (DTCs) are alphanumeric codes generated by a vehicle’s onboard computer when it detects a fault. They help mechanics identify which system or component is malfunctioning.

The Car Curious Weekly

Podcast highlights and car talk, delivered every week.

Help Improve This Entry

Spot an error or have a better explanation? Let us know.