Yamaha FI Code 14: Intake Air Pressure Sensor Hose — Fix
On Yamaha motorcycles and scooters, FI fault code 14 means a hose fault on the intake air pressure sensor — the vacuum hose is clogged, kinked, or detached (this is the hose problem; code 13 is the sensor’s electrical circuit).
- Applies to
- Yamaha motorcycles
- Est. repair cost
- $10 – $60
- Time to fix
- 30–90 minutes
What it means
The usual cause is a cracked, kinked, blocked, or popped-off vacuum hose between the intake and the pressure 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 14 with the warning light on
- Rough running or hesitation
- Poor fuel economy
How to fix it
- 1
Inspect and restore the hose
1. Trace the vacuum hose from the intake to the pressure sensor. 2. Reconnect a detached hose, clear any blockage, and replace a cracked or perished hose. 3. Clear the code and retest.
Frequently asked questions
What’s the difference between code 13 and 14?
Code 13 is the sensor’s electrical circuit; code 14 is specifically its vacuum hose (clogged or detached). Check the hose first for code 14.
Last updated July 16, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.