Every Honda fault code,
traced to the firmware.
A searchable reference for the CBR600RR ECU's diagnostic trouble codes, documented from the factory firmware, not guessed. What each code means, why it triggers, where to look to fix it, and a plain confidence level on every page.
- 50
- codes documented
- 6
- confirmed in firmware
- 39
- major categories
- 4
- firmware generations
Confirmed codes
All 50 codes →Codes where we traced how the ECU detects the fault in the firmware, and it matches the standard Honda meaning.
How the ECU handles a fault
Every code on this bike follows the same four steps. This behaviour is confirmed across the reconstructed firmware.
It watches
The ECU constantly checks its sensors and outputs. A reading that goes out of range, or a circuit that does not respond, starts a short count. A brief glitch is ignored; the fault only counts once it stays bad.
It remembers
A confirmed fault is stored in memory and turns on the FI (check-engine) light. The stored code stays saved, even after the key is off, until it is cleared.
It tells you
You can read the codes two ways: the FI light blinks the number (long flash for tens, short for ones), or a diagnostic tool reads them out over the bike’s diagnostic connector.
You clear it
Fix the underlying problem, then clear the stored codes with a diagnostic tool or the manufacturer’s reset procedure. If the problem is still there, the code comes back the next time the ECU detects it.
When the ECU confirms a fault, it saves the code and turns on the FI (check-engine) light. For a serious fault it also runs the engine on safe default values (limp-home) so you can still ride, with the light on.
// Once a fault is confirmed, remember it and warn the rider.
if (fault_confirmed) {
store_code(code); // kept until the codes are cleared
fi_light = ON;
if (fault_is_serious)
limp_home = ON; // safe defaults so you can ride home
}
Documented honestly, not guessed.
Codes with no identified system are labelled tentative and say so, with no invented meanings. Every claim links back to its research source.