Suzuki FI Code C41: Fuel Pump Control — Causes & Fix
On Suzuki motorcycles and scooters, FI code C41 means a fault in the fuel pump control system — the ECM/relay isn’t driving the fuel pump correctly.
- Applies to
- Suzuki motorcycles
- Est. repair cost
- $30 – $260
- Time to fix
- 30–90 minutes
What it means
Common causes are a failed fuel-pump relay, wiring/connector faults, poor grounds, or a failing fuel pump. 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 C41
- No start or stalling from fuel starvation
- No fuel-pump prime whir at key-on
How to fix it
- 1
Check the pump prime and relay
1. At key-on, listen for the fuel pump priming for a couple of seconds. 2. Test/replace the fuel-pump relay and check its wiring.
- 2
Inspect wiring and pump
1. Check power and ground to the pump. 2. Replace a failed pump, then clear the code.
Frequently asked questions
No fuel-pump sound with C41 — bad pump?
Maybe, but test the relay, wiring, and grounds first — a failed relay or connector is a cheaper and common cause before the pump itself.
Last updated July 15, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.