B0133 code meaning
A/V Sensor Washer Fluid E Control Circuit
What B0133 means
B0133 covers the control circuit of A/V sensor washer fluid E, the fifth channel after B012F to B0132. Autonomous vehicles carry many cameras and lidar units, so cleaning is split into several separately switched fluid paths. Uber's patent US10220817B2 shows a sensor platform whose grooves and raised rim carry fluid and air to the sensor heads. Kautex says its Allegro control software assigns priority among the sensors when coordinating the actuators. In a lab study on lidar windows, results depended above all on the kind of deposit, its density and whether it had dried. Which sensor is on channel E is not disclosed, and no carmaker documents B0133. If the channel stays switched off, deposits on that sensor are no longer removed.
B0133 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0133
- The sensor on channel E keeps a film of dirt or dried spray
- Message that a sensor is blocked or an assistance function is unavailable
Common causes of B0133
- Most likelyPump or valve of channel E defective, coil open or shorted
- PossibleWater ingress or corrosion in the connector of channel E
- Less likelyOutput for channel E in the cleaning control module damaged
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Av washer fluid pump ePump wiring
What each part of B0133 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). |
| 33 | The exact fault in that area. |
What to do next
- Note B0133 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 B0133
What does B0133 mean?
B0133 means "A/V Sensor Washer Fluid E Control Circuit". B0133 covers the control circuit of A/V sensor washer fluid E, the fifth channel after B012F to B0132. It is a generic code, so it means the same on every make.
Is it safe to drive with B0133?
B0133 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0133 fail an emissions test?
B0133 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 B0133 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0133 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.