Aprilia 125 STX Fault Codes

Aprilia 125 STX 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 aprilia 125 stx faults are the list of some of the parts of a motorcycle engine.

Begin by checking Aprilia 125 STX level and adding more, and then see what happens. Another possibility is that your master cylinder is affected by leaks or air bubbles. You may need to have this part replaced to fix it. What can I do when the Aprilia 125 STX brakes lock up while I’m riding? This can be a serious situation, so don’t hesitate to call for a tow truck. The problem could be a problem with your master cylinder.

Aprilia 125 STX Faults :

The warning light comes on when one of the various sensors has detected an abnormal condition in the Aprilia 125 STX engine's performance. For example, if the oil pressure drops below a certain threshold or if the air/fuel ratio rises beyond a certain point, then this would cause an immediate alert from your vehicle's engine management system.

Aprilia engine management system is able to self-diagnose faults and tell you what's wrong with it.

To display the Aprilia Fault Codes diagnostics codes, enable diagnostics mode by pressing the LAP button at key-ON for at least 15 seconds. To exit the diagnostics code display and return to the normal display mode, run a key-OFF/ON cycle. When the faults are eliminated and hence the Fault Code is no longer being sent to the dashboard by the ECU, the dashboard will continue to display them until a key-OFF/ON cycle is run. lithe dashboard is sent a code other than those given in the following diagnostics code table, it will display PXX where the XX ls the last iwo digits of the code in question. lf the CAN line does not respond or is disconnected in diagnostics mode, ERR will flash in place of the code digits

Aprilia Error Code List :

Component Fault Code DTC Possible Cause
Camshaft position sensor 11 Sensor not connected.

Sensor broken.

Wiring faulty.

Crankshaft position sensor 12
Intake pressure sensor 13
Intake pressure sensor 14 Excessive pressure difference between two pressure sensors
Throttle position sensor 15 Sensor not connected.

Sensor broken.

Wiring faulty.

Coolant temperature sensor 21
Air temperature sensor 22
Atmospheric pressure sensor (inside ECU) 23 Sensor faulty
Ignition coil 1, Front cylinder 33 Ignition coil faulty or wiring not connected
Ignition coil 2, Front cylinder 34
Ignition coils 1 and 2, Front cylinder 33,34
Ignition coil 1, Rear cylinder 35
Ignition coil 2, Rear cylinder 36
Ignition coils 1 and 2, Rear cylinder 35,36
Fall Sensor (tip-over sensor) 41 Sensor not connected.

Sensor broken.

Wiring faulty.

Aprilia ECU Error Codes

This menu allows you to view any current errors (active) or stored (memo) as detected by the ECU. The presence of an error is indicated by x. To identify the error, please refer to the “ECU error codes” table.

ERROR DESCRIPTION ECU ERROR CODE
Engine overheatECU 01
Pick-up sensor failureECU 02
Wrong signal from throttle position sensorsECU 03
Wrong signal from throttle position sensor 1ECU 04
Wrong signal from throttle position sensor 2ECU 05
Throttle position sensor 1 malfunctionECU 06
Throttle position sensor 2 malfunctionECU 07
Throttle position sensors malfunctionECU 08
Incorrect charging voltageECU 09
Oil pump malfunctionECU 10
Air injector malfunctionECU 11
Fuel injector malfunctionECU 12
Ignition circuit malfunctionECU 13
Fuel pump malfunctionECU 14
Engine rpm limiter trippedECU 15
Error in ECU power supplyECU 16
Rpm limiter tripped while startingECU 17
Engine temperature sensor malfunctionECU 18
Error on ECU throttle sensor connectionECU 22
Atmospheric pressure sensor malfunctionECU 23

Aprilia Instrument Panel Error Codes :

ERROR DESCRIPTIONINSTRUMENT PANEL ERROR CODE
Immobilizer failure: Key code read but not acknowledgedDSB 01
Immobilizer failure: Key code not read (key not available or transponder broken)DSB 02
Immobilizer failure: Broken antenna (open or short-circuited)DSB 03
Immobilizer failure: Inner controller failureDSB 04
Fuel sensor failureDSB 05

Aprilia 125 STX Motorcycle Problems :

  • Aprilia 125 stx after fire
  • Aprilia 125 stx air cleaner clogged, poorly sealed, or missing
  • Aprilia 125 stx air cleaner element clogged
  • Aprilia 125 stx air duct loose
  • Aprilia 125 stx air suction valve trouble
  • Aprilia 125 stx air switching valve trouble
  • Aprilia 125 stx backfiring when deceleration
  • Aprilia 125 stx cracked or obstructed intake air pressure sensor
  • Aprilia 125 stx crankshaft sensor trouble
  • Aprilia 125 stx eCU ground and power supply trouble
  • Aprilia 125 stx eCU trouble
  • Aprilia 125 stx engine overheating - Water temperature sensor or crankshaft sensor trouble
  • Aprilia 125 stx engine stalls easily
  • Aprilia 125 stx engine vacuum not synchronizing
  • Aprilia 125 stx exhaust Smokes Excessively
  • Aprilia 125 stx firing incorrect
  • Aprilia 125 stx fuel filter clogged
  • Aprilia 125 stx fuel injector clogged
  • Aprilia 125 stx fuel injector O-ring damage
  • Aprilia 125 stx fuel injector trouble
  • Aprilia 125 stx fuel line clogged
  • Aprilia 125 stx fuel poor quality or incorrect
  • Aprilia 125 stx fuel pressure regulator trouble
  • Aprilia 125 stx fuel pressure too low or too high
  • Aprilia 125 stx fuel pump bearings may wear. Replace the fuel pump
  • Aprilia 125 stx fuel pump not operating
  • Aprilia 125 stx fuel pump operates intermittently and often DFI fuse blows
  • Aprilia 125 stx fuel pump relay trouble
  • Aprilia 125 stx fuel pump trouble
  • Aprilia 125 stx fuel/air mixture incorrect
  • Aprilia 125 stx fuel/air mixture incorrect
  • Aprilia 125 stx gear position sensor, starter lockout or side stand switch trouble
  • Aprilia 125 stx inspect and repair or replace
  • Aprilia 125 stx intake air pressure sensor trouble
  • Aprilia 125 stx intake air temperature sensor trouble
  • Aprilia 125 stx intake air temperature sensor trouble
  • Aprilia 125 stx intermittent any DFI fault and its recovery
  • Aprilia 125 stx little fuel in tank
  • Aprilia 125 stx main throttle sensor trouble
  • Aprilia 125 stx no or little fuel in tank
  • Aprilia 125 stx poor acceleration
  • Aprilia 125 stx spark plug burned or gap maladjusted
  • Aprilia 125 stx spark plug dirty, broken or gap maladjusted
  • Aprilia 125 stx spark plug incorrect
  • Aprilia 125 stx spark weak
  • Aprilia 125 stx stick coil shorted or not in good contact
  • Aprilia 125 stx stick coil trouble
  • Aprilia 125 stx subthrottle sensor trouble
  • Aprilia 125 stx subthrottle valve actuator trouble
  • Aprilia 125 stx throttle body assy dust seal damage
  • Aprilia 125 stx throttle body assy holder loose
  • Aprilia 125 stx throttle valves will not fully open
  • Aprilia 125 stx unstable (rough) idling
  • Aprilia 125 stx unstable fuel pressure
  • Aprilia 125 stx vacuum hose
  • Aprilia 125 stx vehicle-down sensor trouble
  • Aprilia 125 stx water or foreign matter in fuel Change fuel
  • Aprilia 125 stx 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 Aprilia 125 STX 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 Aprilia 125 STX engine noise.
  • Aprilia 125 STX fog from engine.
  • Strange Aprilia 125 STX engine noise.
  • Aprilia 125 STX Vibrations and Rattling
  • Aprilia 125 STX Loud Acceleration
  • Aprilia 125 STX rusty exhaust
  • Aprilia 125 STX blockages in exhaust pipe
  • Aprilia 125 STX wear and tear exhaust
Aprilia Logo

Aprilia was founded directly after WW2 as a manufacturer of bicycles, moving to scooters and motorcycles in 1968. Today, Aprilia enjoys success in the competitive sports and adventure bike segments, as well as competing in a variety of motorcycle racing championships.

Check other Aprilia 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 Aprilia 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.

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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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