Bonk DTC docs
Honda · CBR600RR · PGM-FI

How to read the Honda FI (check-engine) light

You do not need a dealer tool. Trigger the blink read-out at the service connector, count the long and short flashes, and decode the code. Here is the whole process, plus where people get stuck.

Open the blink decoder How blink codes work

Work with the engine off and the bike safely supported. Procedures vary by model and year: when in doubt, follow your model service manual. This guide is general reference, not a substitute for it.

  1. 01

    Understand what the FI light is telling you

    A steady FI light means the ECU has stored a fault. A brief flash at key-on is just the normal bulb check. The blink read-out is a separate self-diagnostic sequence you trigger deliberately.

  2. 02

    Find the service check connector

    Most Honda PGM-FI motorcycles have a small service check connector (often under the seat or a side panel). Its exact location varies by model and year, so check your service manual if you cannot find it.

  3. 03

    Bridge the connector, then turn the ignition on

    With the engine off, bridge the two terminals of the service connector (Honda sells a short connector; many owners use a jumper). Then turn the ignition on without starting the engine. The FI light will begin the blink read-out.

  4. 04

    Count the long and short flashes

    A long flash counts ten, a short flash counts one, long flashes first. Watch a full cycle before you commit to a count, and note any longer pauses that separate a second code.

  5. 05

    Decode the pattern

    Enter the pattern in the blink decoder, or count it yourself, to get the major code and a link to what it means and what to check.

    Decode your pattern now →

FI-light FAQ

Do I need a special tool to read Honda FI codes?
No. You can trigger the blink read-out at the service check connector and count the flashes by eye. A diagnostic tool or live-telemetry device is only needed for the exact sub-code, freeze-frame data, or live sensor values.
Where is the Honda service check connector?
It varies by model and year, but it is commonly under the seat or a side panel as a small dedicated connector. Check your model service manual for the exact location.
Why does my FI light only blink with the side stand down?
Many Honda models require the side stand down (and the engine stop switch run, ignition on, engine off) to enter the self-diagnostic blink mode. It is a condition for the read-out, not a fault by itself.
The FI light is on steady but will not blink. What now?
A steady light means a stored fault, but the blink read-out only runs when the service connector is bridged and the entry conditions are met. If it still will not blink, recheck the connector and conditions, or read the codes with a tool.