KTM Trouble codes, decoded
Full Send Gazette · Tech Reference
KTM Trouble
Codes, Decoded
Your EFI warning light isn't just an angry blink, it's Morse code for your bike's ECU. Here's how to read it and what every code actually means.
How the Blink Code Works
When something trips a fault, the FI warning lamp (MIL) on your dash flashes a pattern instead of just staying lit. That pattern is a two-digit number, and it's the ECU telling you exactly what it doesn't like.
Long blinks = the tens digit. Short blinks = the ones digit. Codes under 10 (like code 2 or code 6) just flash short, no long blinks at all. Count the whole sequence before it repeats, the light will loop the pattern a few times.
Example
Code 6
6 short blinks, on a loop
No long blinks, single-digit code = throttle position sensor
Example
Code 25
2 long, then 5 short, on a loop
2 long blinks (tens) then 5 short (ones) = side stand switch
The Full Code List
Sensor
Fuel
Ignition
Electrical
Engine
Emissions
Communication
Security
ECU
| Code | Blink Pattern | System | What It Means |
|---|---|---|---|
| 2 | 2 short | Sensor | Crankshaft position sensor |
| 6 | 6 short | Sensor | Throttle position sensor, output/input signal too low (interruption) |
| 6 | 6 short | Sensor | Throttle position sensor, output/input signal too high (short circuit) |
| 7 | 7 short | Sensor | Sensor for 2nd throttle valve, output/input signal too low (interruption) |
| 7 | 7 short | Sensor | Sensor for 2nd throttle valve, output/input signal too high (short circuit) |
| 9 | 9 short | Sensor | Manifold air pressure sensor, rear cylinder, output/input signal too low (interruption) |
| 9 | 9 short | Sensor | Manifold air pressure sensor, rear cylinder, output/input signal too high (short circuit) |
| 9 | 9 short | Sensor | Manifold absolute pressure sensor, output/input signal too low/high |
| 11 | 1 long, 1 short | Sensor | Manifold air pressure sensor, front cylinder, output/input signal too low (interruption) |
| 11 | 1 long, 1 short | Sensor | Manifold air pressure sensor, front cylinder, output/input signal too high (short circuit) |
| 11 | 1 long, 1 short | Engine | Idle control, engine speed above/below target value |
| 12 | 1 long, 2 short | Sensor | Coolant temperature sensor, output/input signal too low (interruption) |
| 12 | 1 long, 2 short | Sensor | Coolant temperature sensor, output/input signal too high (short circuit) |
| 12 | 1 long, 2 short | Sensor | Engine coolant temperature sensor, input signal too low/high |
| 13 | 1 long, 3 short | Sensor | Air temperature sensor, output/input signal too low (interruption) |
| 13 | 1 long, 3 short | Sensor | Air temperature sensor, output/input signal too high (short circuit) |
| 13 | 1 long, 3 short | Sensor | Intake air temperature sensor, input signal too low/high |
| 14 | 1 long, 4 short | Sensor | Ambient air pressure sensor, output/input signal too low (interruption) |
| 14 | 1 long, 4 short | Sensor | Ambient air pressure sensor, output/input signal too high (short circuit) |
| 14 | 1 long, 4 short | Fuel | Fuel tank sensor, circuit fault, short circuit to ground/plus |
| 15 | 1 long, 5 short | Sensor | Roll angle sensor, output/input signal too low (interruption) |
| 15 | 1 long, 5 short | Sensor | Roll angle sensor, output/input signal too high (short circuit) |
| 15 | 1 long, 5 short | Sensor | Rollover sensor, plausibility, circuit fault, short circuit to ground/plus |
| 16 | 1 long, 6 short | Security | Malfunction, ICU encryption for black ignition key |
| 16 | 1 long, 6 short | Electrical | Radiator fan motor, input signal too low/high, circuit fault |
| 17 | 1 long, 7 short | Sensor | Lambda (O2) sensor, input signal too low/high, no function, circuit fault |
| 18 | 1 long, 8 short | Sensor | Lambda (O2) sensor, front cylinder, malfunction |
| 18 | 1 long, 8 short | Electrical | Engine diagnosis warning lamp (MIL), circuit fault, short circuit to ground/plus |
| 19 | 1 long, 9 short | Fuel | Fuel pump lamp, circuit fault, low fuel warning lamp, input signal too low/high |
| 21 | 2 long, 1 short | Electrical | Engine control relay, switch-off delay |
| 22 | 2 long, 2 short | Sensor | Engine speed signal, circuit fault, input signal too low/high |
| 22 | 2 long, 2 short | Sensor | Gear position sensor, circuit fault |
| 22 | 2 long, 2 short | Sensor | Gear position sensor, input signal high |
| 22 | 2 long, 2 short | Sensor | Gear position sensor, error |
| 23 | 2 long, 3 short | Sensor | Travel speed sensor, measurement range or power problem |
| 24 | 2 long, 4 short | Electrical | Control unit voltage supply malfunction, system voltage too low/high, implausible value |
| 25 | 2 long, 5 short | Electrical | Side stand switch, plausibility, circuit fault, output/input signal too low, short circuit to ground/plus |
| 26 | 2 long, 6 short | Sensor | Sensor A reference voltage, input signal too low/high |
| 27 | 2 long, 7 short | Sensor | Sensor B reference voltage, input signal too low/high |
| 31 | 3 long, 1 short | Security | Malfunction, encryption query from EFI control unit to immobilizer control unit |
| 32 | 3 long, 2 short | Communication | Malfunction in CAN bus communication |
| 33 | 3 long, 3 short | Fuel | Injection valve, rear cylinder, malfunction, circuit fault, input signal too low/high |
| 34 | 3 long, 4 short | Fuel | Injection valve, front cylinder, malfunction |
| 37 | 3 long, 7 short | Ignition | Ignition coil, rear cylinder, malfunction |
| 38 | 3 long, 8 short | Ignition | Ignition coil, front cylinder, malfunction |
| 42 | 4 long, 2 short | Engine | Oil pump, input signal too low/high |
| 45 | 4 long, 5 short | Sensor | Lambda (O2) sensor heater, circuit fault |
| 46 | 4 long, 6 short | Sensor | Lambda probe heater, front cylinder, short circuit to ground/positive |
| 49 | 4 long, 9 short | Engine | Idle speed control motor malfunction, idle control, input signal too low/high, circuit fault |
| 50 | 5 long, 0 short | Electrical | Motor drive circuit B, circuit fault |
| 53 | 5 long, 3 short | Emissions | Purge valve for carbon canister, short circuit to ground/positive |
| 54 | 5 long, 4 short | Emissions | Secondary air valve, short circuit to positive/ground or interruption |
| 58 | 5 long, 8 short | Electrical | EPT motor drive relay permission, signal fault |
| 60 | 6 long, 0 short | ECU | EEPROM malfunction |
| 65 | 6 long, 5 short | ECU | EEPROM error malfunction |
| 68 | 6 long, 8 short | Sensor | Manifold air pressure sensor, rear cylinder, hose pulled off/defective, no vacuum |
| 69 | 6 long, 9 short | Sensor | Manifold air pressure sensor, front cylinder, hose pulled off/defective, no vacuum |
| 72 | 7 long, 2 short | Electrical | Stepper motor for 2nd throttle valve, malfunction |
| 81 | 8 long, 1 short | Security | Immobilizer control unit, circuit fault |
| 91 | 9 long, 1 short | Communication | CAN bus communication error |