B0226 code meaning
Headlamp Auto-Leveling Front Sensor
What B0226 means
The publicly available J2012 lists have no B0226, and no maker documents it for headlamp levelling. Saab uses the number in its 9-3 climate control: B0226 01 is a short to B+ in the recirculation motor circuit, possibly causing stale air or misted windows. Automatic levelling, as HELLA explains, keeps the beam cut-off steady as the load changes. A control unit compares front and rear axle sensors with stored values and drives small motors in the headlamps; dynamic systems, found on almost all xenon cars, also correct for braking and acceleration. Compact cars often omit the front sensor. Each axle sensor is an angle sensor whose lever is clipped to a suspension arm; older ones use a potentiometer, newer ones inductive measurement. With the front sensor failed, the beam stays where it was.
B0226 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0226
- Headlamp levelling warning shown and beam height no longer adjusts
- Oncoming drivers flash because the beam is set too high under load
Common causes of B0226
- Most likelyLever or coupling rod of the front axle sensor bent, broken or detached
- PossibleConnector or wire at the sensor corroded or damaged by road splash
- PossibleSensor worn out internally or not calibrated after replacement or suspension work
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Front ride height sensorHeadlamp leveling moduleBody control module
What each part of B0226 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 26 | The exact fault in that area. |
What to do next
- Note B0226 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0226
What does B0226 mean?
B0226 means "Headlamp Auto-Leveling Front Sensor". The publicly available J2012 lists have no B0226, and no maker documents it for headlamp levelling. It is a generic code, so it means the same on every make.
Is it safe to drive with B0226?
B0226 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0226 fail an emissions test?
B0226 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0226 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will B0226 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.