Tag
#annual test
3 posts in Car Diagnostics blog about "annual test" — OBD-II diagnostics, DTC codes, repair. ← All posts
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Exhaust modifications: what breaks besides the sound
Removing a catalyst or particulate filter changes more than the noise. The consequences for sensors, codes, and the annual test.
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LED bulbs in halogen headlights: why it does not work as promised
An LED in a headlight designed for a filament gives not more light but a wrong beam. Optics, electronics, and the consequences.
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Pending, stored, and permanent: three kinds of code and why it matters
Not all codes are equal: one warns, one has already lit the lamp, and one cannot be cleared at all. The difference and how to use it.