U3000 on Honda

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

2020–2021
Supported by vehicle data
Honda A21100B: causes of SRS U3000-49 across many 2020-2021 models. Whether it is still current is not verified.
2016 · Civic
Supported by vehicle data
Honda ATS160713: brake light blinking after setting the electric parking brake, with U3000-49. Whether it is still current is not verified.

A21100BStatus unverified
SRS DTC U3000-49
2020–2021accord, civic, cr-v, pilot, odyssey · issued January 29, 2022 · NHTSA 10206988
Several causes can store U3000-49 (internal failure of the SRS unit); follow troubleshooting to isolate the part.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
ATS160713Status unverified
Brake indicator blinking after applying the electric parking brake
2016civic · issued July 12, 2016 · NHTSA 10084411
U3000-49 (ECU internal circuit malfunction) may be set.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Honda A21100B: SRS DTC U3000-49 (internal failure of the SRS unit) — American Honda Motor Co. / NHTSA , January 29, 2022
Honda Techline ATS160713: Brake indicator blinking after applying the electric parking brake, U3000-49 — American Honda Motor Co. / NHTSA , July 12, 2016
Ford SSM 48831: 2020 Escape/Corsair lack of power steering assist with U3000 in the PSCM — Ford Motor Company / NHTSA , May 21, 2020
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