GSXR motorcycles feature a self-diagnostic system that displays Fault Indicator (FI) codes when an issue is detected within the fuel injection or engine management systems. These codes typically appear on the instrument cluster, often indicated by an “FI” light and a corresponding code number.
To read these codes, the motorcycle usually needs to be put into “dealer mode.” This process varies by model and year but generally involves shorting specific pins on a diagnostic connector. Always refer to your specific model’s service manual for the correct procedure.
Common GSXR FI Fault Codes
The following list contains common FI codes for various Suzuki GSXR models. Please note that code definitions can vary slightly between different model years and specific bikes. For definitive information, always consult the official service manual for your motorcycle.
- C00: No fault detected (when in dealer mode)
- C11: Camshaft Position Sensor (CMPS)
- C12: Crankshaft Position Sensor (CKPS)
- C13: Intake Air Pressure Sensor #2 (IAPS #2) – often related to STVA
- C14: Throttle Position Sensor (TPS)
- C15: Engine Coolant Temperature Sensor (ECTS)
- C17: Intake Air Pressure Sensor #1 (IAPS #1)
- C21: Intake Air Temperature Sensor (IATS)
- C22: Atmospheric Pressure Sensor (APS)
- C23: Tip Over Sensor (TOS)
- C24: Ignition Signal – Coil #1 (Cylinder 1)
- C25: Ignition Signal – Coil #2 (Cylinder 2)
- C26: Ignition Signal – Coil #3 (Cylinder 3)
- C27: Ignition Signal – Coil #4 (Cylinder 4)
- C28: Secondary Throttle Valve Actuator (STVA)
- C29: Secondary Throttle Position Sensor (STPS)
- C31: Gear Position Sensor (GPS)
- C32: Injector Signal – #1
- C33: Injector Signal – #2
- C34: Injector Signal – #3
- C35: Injector Signal – #4
- C40: Idle Speed Control Valve (ISC Valve) or (on older models) FI System Power Source for ISC valve
- C41: Fuel Pump Control System / Fuel Pump Relay (FPR)
- C42: Ignition Switch Signal / Anti-theft immobilizer (if equipped)
- C44: Heated Oxygen Sensor (HO2S) – if equipped
- C46: Exhaust Control Valve Actuator (EXCVA) – (e.g., GSXR1000 and some 750 models)
- C49: PAIR Control Solenoid Valve
- C60: Cooling Fan Control System / Relay
- C62: EVAP System Purge Control Solenoid Valve (California models or others where equipped)
- C93: Steering Damper Solenoid Valve (electronically controlled, if equipped)
Important: This list serves as a general guide. The presence of an “FI” light may also display “CHEC” on the instrument panel, indicating a fault is present and the system needs to be put into dealer mode to retrieve the specific “C” code. Always refer to the factory service manual for your particular GSXR model and year for accurate diagnostic procedures and code interpretations.
