B0810Left Headlamp Low Beam Circuit
- Generic OBD-II code · Body
- How the car detects it
- Whether any carmaker sets B0810 is unknown – the number shows up in no J2012 excerpt and no service literature. The title covers the left dipped-beam output. The GM-era Saab 9-3 checks it in the front electrical centre under the number B2575: with the switch at dipped beam (position 2), a draw below 0.8 A sets B2575 04 (open) and one of 7.9–30 A sets B2575 0B, which may also mean a bulb of the wrong rating. With xenon lamps the ignition has to be on for 30 s before the test can run. HELLA explains why: the xenon ballast first fires the lamp with up to 30 kV and only then regulates it to a steady 35 W. A dark left dipped beam is a road-safety defect and should be repaired before driving at night. Right side: B0811.
- What you may notice
- Left dipped beam dark, lamp failure message in the display
- Reduced view of the left road edge at night; repair before driving in the dark
- Light flickers or fails only after the lamp has warmed up
- Likely causes
- LikelyLow-beam bulb burnt out
- PossibleBulb of the wrong wattage fitted
- PossibleXenon ballast or igniter faulty
- PossibleCorroded headlamp plug or poor ground
- RareLamp output of the lighting or body module faulty
- Repair
- Easy · Often possible to do yourself.Typical cost: €10 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.