Suzuki FI Code C11: Camshaft Position Sensor — Fix
On Suzuki motorcycles and scooters, FI code C11 means a fault in the camshaft position sensor circuit — the sensor the ECM uses to identify the cylinder cycle for injection and ignition timing.
- Applies to
- Suzuki motorcycles
- Est. repair cost
- $25 – $170
- Time to fix
- 30–90 minutes
What it means
Look for a loose/corroded connector, harness damage, metal debris on the sensor tip, or a failed cam position 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 C11
- Hard starting or no start
- Rough running or stalling
How to fix it
- 1
Check the sensor connector and tip
1. Locate the camshaft position sensor on the cylinder head. 2. Reseat the connector; clean any metal debris from the sensor face.
- 2
Test and replace
1. Measure the sensor resistance against spec. 2. Replace if out of range, then clear the code.
Frequently asked questions
Why is my Suzuki hard to start with C11?
A poor cam-sensor signal makes it harder for the ECM to sync injection and spark, so it cranks longer. Check the connector and wiring first.
Last updated July 15, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.