Diagnostics

Your Car Was Fine at Inspection. Now It Isn't. Here's What's Actually Going On.

Intermittent faults are the most maddening problems in automotive repair — they show up when they feel like it and disappear the moment a tech tries to find them. Understanding how your car's OBD-II system stores these ghost codes, and knowing what information to document, can be the difference between a fast fix and months of frustration.

Jul 2, 2026

Your Scanner Says One Thing, Your Wallet Pays for Another: 10 OBD-II Codes Mechanics Frequently Get Wrong

That little code your car throws isn't always pointing at the part your mechanic wants to replace. These 10 OBD-II codes are routinely misread — even by experienced technicians — and the resulting misdiagnosis can cost you hundreds in unnecessary repairs. Here's what each code is actually trying to tell you.

Jul 2, 2026