KTM 540 SX Fault Codes

KTM 540 SX motorcycles have engines, which are made up of many different parts. These parts must work together in order for the engine to function. A problem with one of the parts can make the engine not run. There are many different parts that make up an engine. The following ktm 540 sx faults are the list of some of the parts of a motorcycle engine.

We’ve compiled a list of some frequently asked questions about KTM 540 SX motorcycle brakes. This way, you can find answers to some of the most common issues and prepare yourself for the next time you need to take your bike into the shop.

KTM 540 SX Faults :

Engine management systems of KTM 540 SX are responsible for monitoring a range of features and its warning light should go out a few seconds after ignition. The system's main job is to keep the engine running at peak performance by monitoring many parameters like coolant temperature, oil pressure, fuel level and air/fuel ratio. The system monitors these parameters continuously and alerts the driver if any of these parameters fall outside the predetermined limits.

KTM Motorcycle Engine Fault Codes :

CodeDescription
ConstantTilt Sensor - input signal too high
ConstantTilt Sensor - input signal too low
2Crankshaft speed sensor - synchronization faulty
2Crankshaft speed sensor - signal implausible
2Crankshaft speed sensor - signal irregular
2Crankshaft speed sensor - no signal
6Throttle valve position sensor circuit A - adaption failed
6Throttle valve position sensor circuit A - input signal too low
6Throttle valve position sensor circuit A - input signal too high
9Crankcase pressure sensor - short circuit to ground
9Crankcase pressure sensor - open / short to plus
9Ambient air pressure sensor - short circuit to ground
9Ambient air pressure sensor - open / short circuit to plus
12Coolant temperature sensor - input signal too low
12Coolant temperature sensor - input signal too high
13Intake air temperature sensor - input signal too low
13Intake air temperature sensor - input signal too high
14Crankcae pressure sensor - difference too high between sensor and engine ECU
21Battery voltage - input voltage too low
21Battery voltage - input voltage too high
33Injection valve 0, cylinder 1- input signal too low
33Injection valve 0, cylinder 1- input signal too high
34Injection valve 1, cylinder 1- input signal too low
34Injection valve 1, cylinder 1- input signal too high
37Ignition coil - circuit fault
41Fuel pump - short circuit to ground / open circuit
41Fuel pump - open circuit / short circuit to plus
42Oil pump - input signal too low
42Oil pump - signal too high

KTM Flash Codes :

Blink code of FI warning
lamp (MIL)
02 FI warning lamp (MIL) flashes 2x short
Error level condition Crankshaft position sensor - measurement range or power problem
Blink code of FI warning
lamp (MIL)
06 FI warning lamp (MIL) flashes 6x short
Error level condition Throttle position sensor circuit A - input signal too low
Throttle position sensor circuit A - input signal too high
Blink code of FI warning
lamp (MIL)
09 FI warning lamp (MIL) flashes 9x short
Error level condition Manifold absolute pressure sensor - input signal too low
Manifold absolute pressure sensor - input signal too high
Blink code of FI warning
lamp (MIL)
11 FI warning lamp (MIL) flashes 1x long, 1x short
Error level condition Idle control - engine speed below target value
Idle control - engine speed above target value
Blink code of FI warning
lamp (MIL)
12 FI warning lamp (MIL) flashes 1x long, 2x short
Error level condition Engine coolant temperature sensor - input signal too low
Engine coolant temperature sensor - input signal too high
22 FLASH CODE 173
Blink code of FI warning
lamp (MIL)
13 FI warning lamp (MIL) flashes 1x long, 3x short
Error level condition Intake air temperature sensor - input signal too low
Intake air temperature sensor - input signal too high
Blink code of FI warning
lamp (MIL)
14 FI warning lamp (MIL) flashes 1x long, 4x short
Error level condition Fuel tank sensor - circuit fault
Fuel tank sensor - short circuit to ground
Fuel tank sensor - short circuit to plus
Blink code of FI warning
lamp (MIL)
15 FI warning lamp (MIL) flashes 1x long, 5x short
Error level condition Rollover sensor - plausibility
Rollover sensor - circuit fault
Rollover sensor - short circuit to ground
Rollover sensor - short circuit to plus
Blink code of FI warning
lamp (MIL)
16 FI warning lamp (MIL) flashes 1x long, 6x short
Error level condition Radiator fan motor - circuit fault
Radiator fan motor - input signal too low
Radiator fan motor - input signal too high
22 FLASH CODE 174
Blink code of FI warning
lamp (MIL)
17 FI warning lamp (MIL) flashes 1x long, 7x short
Error level condition Lambda sensor - circuit fault
Lambda sensor - input signal too low
Lambda sensor - input signal too high
Lambda sensor - no function
Blink code of FI warning
lamp (MIL)
18 FI warning lamp (MIL) flashes 1x long, 8x short
Error level condition Engine diagnosis warning lamp (MIL) - circuit fault
Engine diagnosis warning lamp (MIL) - short circuit to ground
Engine diagnosis warning lamp (MIL) - short circuit to plus
Blink code of FI warning
lamp (MIL)
19 FI warning lamp (MIL) flashes 1x long, 9x short
Error level condition Fuel pump lamp - circuit fault
Low fuel warning lamp - input signal too low
Low fuel warning lamp - input signal too high
Blink code of FI warning
lamp (MIL)
21 FI warning lamp (MIL) flashes 2x long, 1x short
Error level condition Engine control relay - switch-off delay
22 FLASH CODE 175
Blink code of FI warning
lamp (MIL)
22 FI warning lamp (MIL) flashes 2x long, 2x short
Error level condition Engine speed signal - circuit fault
Engine speed signal - input signal too low
Engine speed signal - input signal too high
Blink code of FI warning
lamp (MIL)
23 FI warning lamp (MIL) flashes 2x long, 3x short
Error level condition Travel speed sensor - measurement range or power problem
Blink code of FI warning
lamp (MIL)
24 FI warning lamp (MIL) flashes 2x long, 4x short
Error level condition System voltage - too low
System voltage - too high
System voltage - implausible value
Blink code of FI warning
lamp (MIL)
25 FI warning lamp (MIL) flashes 2x long, 5x short
Error level condition Side stand switch - plausibility
Side stand switch - circuit fault
Side stand switch - short circuit to ground
Side stand switch - short circuit to plus
22 FLASH CODE 176
Blink code of FI warning
lamp (MIL)
26 FI warning lamp (MIL) flashes 2x long, 6x short
Error level condition Sensor A reference voltage - input signal too low
Sensor A reference voltage - input signal too high
Blink code of FI warning
lamp (MIL)
27 FI warning lamp (MIL) flashes 2x long, 7x short
Error level condition Sensor B reference voltage - input signal too low
Sensor B reference voltage - input signal too high
Blink code of FI warning
lamp (MIL)
33 FI warning lamp (MIL) flashes 3x long, 3x short
Error level condition Injector - circuit fault
Injector - input signal too low
Injector - input signal too high
Blink code of FI warning
lamp (MIL)
41 FI warning lamp (MIL) flashes 4x long, 1x short
Error level condition Fuel pump relay - circuit fault
Fuel pump relay - input signal too low
Fuel pump relay - input signal too high
22 FLASH CODE 177
Blink code of FI warning
lamp (MIL)
45 FI warning lamp (MIL) flashes 4x long, 5x short
Error level condition Lambda sensor heater - circuit fault
Lambda sensor heater - short circuit to ground or open circuit
Lambda sensor heater - input signal too high
Blink code of FI warning
lamp (MIL)
49 FI warning lamp (MIL) flashes 4x long, 9x short
Error level condition Idle control - input signal too low
Idle control - input signal too high
Idle control - circuit fault

KTM 540 SX Motorcycle Problems :

  • KTM 540 sx after fire
  • KTM 540 sx air cleaner clogged, poorly sealed, or missing
  • KTM 540 sx air cleaner element clogged
  • KTM 540 sx air duct loose
  • KTM 540 sx air suction valve trouble
  • KTM 540 sx air switching valve trouble
  • KTM 540 sx backfiring when deceleration
  • KTM 540 sx cracked or obstructed intake air pressure sensor
  • KTM 540 sx crankshaft sensor trouble
  • KTM 540 sx eCU ground and power supply trouble
  • KTM 540 sx eCU trouble
  • KTM 540 sx engine overheating - Water temperature sensor or crankshaft sensor trouble
  • KTM 540 sx engine stalls easily
  • KTM 540 sx engine vacuum not synchronizing
  • KTM 540 sx exhaust Smokes Excessively
  • KTM 540 sx firing incorrect
  • KTM 540 sx fuel filter clogged
  • KTM 540 sx fuel injector clogged
  • KTM 540 sx fuel injector O-ring damage
  • KTM 540 sx fuel injector trouble
  • KTM 540 sx fuel line clogged
  • KTM 540 sx fuel poor quality or incorrect
  • KTM 540 sx fuel pressure regulator trouble
  • KTM 540 sx fuel pressure too low or too high
  • KTM 540 sx fuel pump bearings may wear. Replace the fuel pump
  • KTM 540 sx fuel pump not operating
  • KTM 540 sx fuel pump operates intermittently and often DFI fuse blows
  • KTM 540 sx fuel pump relay trouble
  • KTM 540 sx fuel pump trouble
  • KTM 540 sx fuel/air mixture incorrect
  • KTM 540 sx fuel/air mixture incorrect
  • KTM 540 sx gear position sensor, starter lockout or side stand switch trouble
  • KTM 540 sx inspect and repair or replace
  • KTM 540 sx intake air pressure sensor trouble
  • KTM 540 sx intake air temperature sensor trouble
  • KTM 540 sx intake air temperature sensor trouble
  • KTM 540 sx intermittent any DFI fault and its recovery
  • KTM 540 sx little fuel in tank
  • KTM 540 sx main throttle sensor trouble
  • KTM 540 sx no or little fuel in tank
  • KTM 540 sx poor acceleration
  • KTM 540 sx spark plug burned or gap maladjusted
  • KTM 540 sx spark plug dirty, broken or gap maladjusted
  • KTM 540 sx spark plug incorrect
  • KTM 540 sx spark weak
  • KTM 540 sx stick coil shorted or not in good contact
  • KTM 540 sx stick coil trouble
  • KTM 540 sx subthrottle sensor trouble
  • KTM 540 sx subthrottle valve actuator trouble
  • KTM 540 sx throttle body assy dust seal damage
  • KTM 540 sx throttle body assy holder loose
  • KTM 540 sx throttle valves will not fully open
  • KTM 540 sx unstable (rough) idling
  • KTM 540 sx unstable fuel pressure
  • KTM 540 sx vacuum hose
  • KTM 540 sx vehicle-down sensor trouble
  • KTM 540 sx water or foreign matter in fuel Change fuel
  • KTM 540 sx water temperature sensor trouble

The electrical system includes the battery, the charging system, the starters, and the charging system. It is also possible that the electrical system can fail due to a problem with the generator. A good place to start KTM 540 SX troubleshooting the electrical system is to check the engine parts. For example, it is possible that the electrical system can fail due to a problem with the generator. A good place to start troubleshooting the electrical system is to check the engine parts.

Possible Failure Types :

  • Strange KTM 540 SX engine noise.
  • KTM 540 SX fog from engine.
  • Strange KTM 540 SX engine noise.
  • KTM 540 SX Vibrations and Rattling
  • KTM 540 SX Loud Acceleration
  • KTM 540 SX rusty exhaust
  • KTM 540 SX blockages in exhaust pipe
  • KTM 540 SX wear and tear exhaust
KTM Logo

Through a very complicated series of events, the informal company started in Mattighofen, Austria in 1934 became KTM AG in 1992. KTM is now one of the largest European producers of motorcycles, and are world-famous for their nearly indestructible off-road and adventure bikes.

Check other KTM fault codes.

Common abbreviations and their meanings below:

ABS: Anti-Lock Braking System
ACR: Automatic Compression Release
AFR: Air Fuel Ratio
AIS: Active Intake Solenoid
ATS: Air Temperature Sensor
BAS: Bank Angle Sensor
BCM: Body Control Module
CAN: Controller Area Network
CCM: Cruise Control Module
CKP: Crank Position Sensor
DLC: Datalink Connector
DTC: Diagnostic Trouble Codes
ECM: Electronic Control Module
ECT: Engine Coolant Temperature
ECU: Electronic Control Unit
EFI: Electronic Fuel Injection
EFP: Electronic Fuel Pump
ET: Engine Temperature sensor
FI: Fuel Injectors
FPR: Fuel Pressure Regulator
H-DSSS: Harley-Davidson® Smart Security System
HCU: Hydraulic Control Unit, ABS
HFSM: Hands Free Security Module
HO2S: Heated Oxygen Sensor
IAC: Idle Air Control actuator
IAT: Intake Air Temperature sensor
ICM: Ignition Control Module
IMAP: MAP + IAT in one unit
ISS: Ion Sensing System
JSS: Jiffy Stand Sensor
LHCM: Left Hand Control Module
MAP: Manifold Absolute Pressure sensor
MHR: Right Hand Control Module
RCM: Reverse Control Module
TCA: Throttle Control Actuator
TGS: Twist Grip Sensor
TMAP: Intake Air Temperature / Manifold Absolute Pressure equipment
TPS: Throttle Position Sensor
TSM / TSSM: (Turn Signal / Turn Signal Security Module)
VE: Volume Efficiency
VIN: Vehicle Identification Number
VSS: Vehicle Speed Sensor
WSS: Wheel Speed Sensor

These abbreviations, and the accompanying list of trouble codes, can be a great start when your KTM check engine light comes on. As mentioned above, if you are not comfortable with electrical diagnostic work, a dealership or qualified technician can offer assistance. Please keep in mind that even though you have the ability to clear a DTC using the onboard diagnostic feature, you shouldn't clear the code prior to your service appointment. Let the technician view and clear the codes as they troubleshoot the issue.

KTM and logo are registered trademarks of KTM. We are fan of MOTORCYCLES ! We love them.

Motorcycle electrical systems are very complex to fix it, check with your motorcycle diagnosis tool for the fault code and start motorcycle troubleshooting process.Some bike problems require professional troubleshooting and repair. However, there are many issues that you can easily fix on your own.

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