U3000 on Acura

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 Acura. For what U3000 means, the ranked causes and the test order, see the U3000 guide.

2020–2021
Supported by vehicle data
Acura B21100A: causes of SRS U3000-49 on 2020-2021 models. Whether it is still current is not verified.

B21100AStatus unverified
SRS DTC U3000-49
2020–2021mdx, rdx, tlx, ilx · issued November 11, 2021 · NHTSA 10203504
Acura version of the same article on the causes of SRS U3000-49.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Acura B21100A: SRS DTC U3000-49 (internal failure of the SRS unit) — American Honda Motor Co. / NHTSA , November 11, 2021
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