FI
Honda Motorcycle
Severity:What Does This Error Mean?
Honda motorcycle FI (Fuel Injection) warning light means the ECM has detected a fault in the fuel injection system. Honda uses a blink code system — count the flashes to identify the specific fault code without a scan tool.
Affected Models
- Honda CBR Series
- Honda CB Series
- Honda CRF Series
- Honda Africa Twin
- Honda NC Series
- Honda Forza Scooter
Common Causes
- MAP sensor fault (Code 1)
- Engine coolant temperature sensor fault (Code 7)
- Throttle position sensor fault (Code 8)
- Injector circuit fault (Code 12)
- Oxygen sensor fault
- Crankshaft position sensor fault
How to Fix It
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Read the Honda blink codes.
Turn the ignition ON (engine off). The FI light will blink in a pattern: slow blinks = tens digit, fast blinks = units digit. For example: 1 slow blink + 7 fast blinks = Code 17. Count carefully and write the number down.
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Look up the blink code.
Common Honda FI codes: 1 (MAP sensor), 7 (coolant temp sensor), 8 (TPS), 9 (IAT sensor), 12 (injector), 21 (O2 sensor), 33 (ECM fault). The blink code tells you exactly which sensor or system to inspect.
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Check the sensor or component indicated.
Most Honda sensors have a two-pin or three-pin connector. Inspect the connector for corrosion or a loose fit. Disconnect and reconnect firmly — loose connectors cause many FI light faults, especially after the bike has been in rain or storage.
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Clear the code and test ride.
After fixing the fault, clear the stored code by disconnecting the battery for 30 seconds (or using a scan tool). Ride for 15–20 minutes and confirm the FI light does not return.
When to Call a Professional
If the FI light is on and the bike runs noticeably differently (rough, no power, stalling), read the blink code first. If the code points to a sensor or injector and you are not comfortable with fuel system work, a Honda dealer can diagnose and replace the part quickly.