Yamaha FI Code 30: Overturn Sensor — Causes & Fix
On Yamaha motorcycles and scooters, FI fault code 30 means the ECU has registered that the motorcycle overturned — the lean-angle (tip-over) sensor has cut the engine as a safety measure.
- Applies to
- Yamaha motorcycles
- Est. repair cost
- $20 – $130
- Time to fix
- 30–90 minutes
What it means
Usual causes are the sensor left in the tripped state, a loose/corroded connector, damaged wiring, or a failed lean-angle sensor. This is a generic Yamaha fuel-injection (FI) fault code, so it applies across Yamaha FI models — scooters and underbones like the Mio, NMAX, Aerox, and Sniper, plus YZF-R and MT motorcycles. Yamaha shows the code as a number on the diagnostic/odometer display, and the engine-warning light comes on. Once the fault is repaired and the ECU no longer detects it, the code clears; cycling the ignition (or using a Yamaha diagnostic tool) may be needed to confirm.
Symptoms
- FI code 30, engine won’t start or cuts out
- Appears after the bike has fallen or leaned too far
- Warning light on
How to fix it
- 1
Reset the sensor
1. Stand the bike fully upright. 2. Turn the ignition off, then on again — after a genuine tip-over this usually restores starting.
- 2
Inspect or replace the sensor
1. Check the lean-angle sensor connector and wiring. 2. Replace the sensor if it stays tripped, then clear the code.
Frequently asked questions
My Yamaha won’t start after tipping over — is code 30 why?
Very likely. The overturn sensor cuts the engine for safety. Stand the bike up and cycle the ignition; if it still won’t start, check the sensor and connector.
Last updated July 15, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.