B104B31 — Left Front tyre pressure sensor signal lost
Quick answer
B104B31 means the car is not receiving a signal from the tyre pressure sensor at the left front wheel. The sensor itself, or its connection in that wheel, is the usual cause.
What to check first
- Read all stored fault codes with a scan tool and deal with related codes first.
Can I still drive?
Usually drivable — have it checked soon. If in doubt, park the car and ask a technician — a fault that limits power or shuts the high-voltage system down will not clear by itself.
Parts for B104B31
A fault code points to a system, not always to one part. Work through the checks above first. If they point to a part, these are the references usually involved. The right version depends on the build, so it is confirmed against the VIN before anything is quoted.
| Part | OE reference | |
|---|---|---|
| Tyre pressure sensor | 861913201A | View reference |
Need one of these parts? Send us the fault code, the VIN and a photo of the part or its label. We check the reference against the VIN, then tell you what we can supply, the price and the lead time.
Frequently asked questions
Can I drive an Aiways U5 with B104B31?
Usually drivable — have it checked soon. If in doubt, park the car and ask a technician — a fault that limits power or shuts the high-voltage system down will not clear by itself.
What does B104B31 mean?
B104B31 means the car is not receiving a signal from the tyre pressure sensor at the left front wheel. The sensor itself, or its connection in that wheel, is the usual cause.
What should be checked first for B104B31?
Read all stored fault codes with a scan tool and deal with related codes first.
Which parts can be involved in B104B31?
Depending on what the checks show: Tyre pressure sensor. A fault code points to a system, not always to one part, so confirm the cause before replacing anything.
Other Body Control Module (BCM) codes for the Aiways U5
Need the part or a second opinion?
Send the fault code and your VIN. We confirm the reference against the VIN, then tell you availability, price and lead time. We ship from China to workshops and distributors across Europe.