Suzuki FI Code C22: Atmospheric Pressure Sensor — Causes & Fix
On Suzuki motorcycles and scooters, FI code C22 means a fault in the atmospheric (ambient) pressure sensor circuit — used to compensate fuelling for altitude and barometric pressure.
- Applies to
- Suzuki motorcycles
- Est. repair cost
- $20 – $130
- Time to fix
- 30–90 minutes
What it means
Common causes are a loose/corroded connector, harness damage, or a failed sensor. This is a generic Suzuki fuel-injection (FI) code, so it applies across Suzuki FI models — the Raider R150 Fi, Smash, Gixxer, GSX-R and GSX-S range, V-Strom, and more. Suzuki reports it as a "C" number, shown through the FI-light blink pattern or by entering the bike’s dealer/diagnostic mode. After the fault is repaired it becomes a stored "history" code; clear it through Suzuki’s dealer/diagnostic mode so the FI light goes out.
Symptoms
- FI light on with code C22
- Small running or economy changes, especially with altitude
- Usually mild
How to fix it
- 1
Inspect connector and wiring, then replace
1. Reseat the sensor connector and check for corrosion. 2. Test the wiring; replace the sensor if faulty, then clear the code.
Frequently asked questions
Will C22 stop the bike?
Rarely — the ECM uses a default value, so it usually still runs. Fix it to keep fuelling right across altitudes.
Last updated July 15, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.