U3003 on Mazda

Manufacturer code: on Ford, Lincoln, Mazda and Honda, the module that stored it saw its battery supply voltage outside the allowed range, usually too low

Severity: Inspect soon

Ford stores U3003 in the ABS and power steering modules with brake warnings and heavy steering, and Honda in the brake booster, so get the battery and charging system checked soon.

It gets more serious if:

Stop: Stop in a safe place if steering assist is lost, the brake pedal goes hard or sinks, or the car shows a Check Brake System or Do not drive message.

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

This page covers only what differs on Mazda. For what U3003 means, the ranked causes and the test order, see the U3003 guide.

What's different on Mazda

Mazda

2016–2021 · CX-9
Supported by vehicle data
Mazda 1104M and MT-003-20: power liftgate inoperative with U3003:16 or :17 from battery voltage (also CX-5). Whether they are still current is not verified.

MT-003-20Status unverified
Power liftgate inoperative with U3003:16 or :17
2016–2021cx-5, cx-9 · issued August 7, 2020 · NHTSA 10179154
Caused by low or high battery voltage.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
1104MStatus unverified
Power liftgate inoperative with U3003:16
2016cx-9 · issued May 27, 2016 · NHTSA 10092344
May be caused by low battery voltage.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Sources and review

Mazda 1104M: power liftgate inoperative with U3003:16 (2016 CX-9) — Mazda North American Operations / NHTSA , May 27, 2016
Mazda MT-003-20: power liftgate inoperative with U3003:16 or U3003:17 (2016-2021 CX-5, CX-9) — Mazda North American Operations / NHTSA , August 7, 2020
Ford SSM 52062: Check Brake System message with U3003:16 in the ABS module (2023 F-150) — Ford Motor Company / NHTSA , November 10, 2023
Ford SSM 49662: heavy steering with U3003:68 after auto start-stop (2018 F-150) — Ford Motor Company / NHTSA , March 15, 2021
Ford SSM 47792: lack of power steering assist with U3003 and U2011 (2019 Transit Connect) — Ford Motor Company / NHTSA , February 6, 2019
NHTSA complaint 11766302: 2019 Honda CR-V brake warnings with U3003-16 — NHTSA Office of Defects Investigation

Last reviewed: October 15, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

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

Severity: Inspect soon

What's different on Mazda

MazdaYour car

Sources and review

Mazda