U3000 on Mazda

Manufacturer code: on Ford, Honda, Acura and Mazda, the module that stored it found a fault inside itself

Severity: Inspect soon

U3000 often sits in a safety system. Ford links it to lack of steering assist, and Honda to an airbag (SRS) unit fault, so get it diagnosed soon.

It gets more serious if:

Stop: Stop in a safe place if steering assist is lost or the car shows a Do not drive message. Sudden loss of steering assist raises crash risk.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

This page covers only what differs on Mazda. For what U3000 means, the ranked causes and the test order, see the U3000 guide.

2019–2023 · Mazda3
Supported by vehicle data
Mazda 15-001-25: U3000:04 in the forward sensing camera with i-ACTIVSENSE warnings (also CX-30 and MX-30). Whether it is still current is not verified.

15-001-25Status unverified
i-ACTIVSENSE warnings with U3000:04
2019–2023cx-30, mazda3, mx-30 · issued February 8, 2025 · NHTSA 11014812
Forward sensing camera internal malfunction, possibly a hardware failure in the camera.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Mazda 15-001-25: i-ACTIVSENSE/ALH warnings with U3000:04 (forward sensing camera) — Mazda North American Operations / NHTSA , February 8, 2025
Ford SSM 48831: 2020 Escape/Corsair lack of power steering assist with U3000 in the PSCM — Ford Motor Company / NHTSA , May 21, 2020
Honda A21100B: SRS DTC U3000-49 (internal failure of the SRS unit) — American Honda Motor Co. / NHTSA , January 29, 2022
Mitchell 1: Troubleshooting Honda seat weight sensor — Vehicle Service Pros (Mitchell 1) , January 14, 2025

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error