Quick answer:
- Codes identify a system, not the exact failed part.
- A flashing light means an active misfire. Act now.
- One code can have several different causes.
How the Codes Work
OBD2 codes start with a letter (P for powertrain is most common) and a number that maps to a system: emissions, fuel, ignition, and so on. They tell you where to look, not exactly what failed.
Same Code, Many Causes
A misfire code, for example, can come from a spark plug, an ignition coil, a vacuum leak, or fuel delivery. That’s why testing matters before replacing parts.
Solid vs. Flashing
A steady light means “diagnose soon.” A flashing light means an active misfire that can damage the catalytic converter. Ease off and get help. If you’re in the Austin area, call (505) 510-1409 and we’ll come to you.
Frequently Asked Questions
Can I drive with the light on?
If it’s steady and the car drives normally, briefly, but get it checked. Flashing means stop and call.
Does a code tell you the repair?
It narrows it to a system. Confirming the exact cause needs live data and testing.
Can you diagnose it at my place?
Yes. We bring scan tools to you and confirm the cause on-site.
Need a mobile mechanic in Austin? Call Austin Mobile Mechanic at (505) 510-1409 for fast, local, upfront-priced on-site service, or request service online. We come to you across the Austin metro.