Honda XR 125 Fault Codes

Honda XR 125 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 honda xr 125 faults are the list of some of the parts of a motorcycle engine.

One of the most common issues with Honda XR 125 motorcycle electrical systems is a clogged battery terminal. This can cause your ride to start having issues with the electrical components. Discolored terminals are often caused by a build-up of corrosion. This will prevent electrons from flowing properly, which reduces your rideā€™s electrical performance.

Honda XR 125 Faults :

Another drawback that may occur along with your bike engine could be a blown gasket. this will cause your engine to overheat and presumably crack the cylinder heads. during this case, it's best to require your Honda XR 125 bike to an expert mechanic to possess it verified. Another common drawback is with the carburettor. The carburettor is that the a part of your bike that mixes air and fuel to make the combustion required to power the engine.

HONDA Motorcycle Fault Codes DTC list

Code (MIL)Cause (a, b, c, ...)Symptoms
Steady onThere is a jumper in the service connector; not faulty controlnunit (ECM); short circuit in the service connectorEngine is operating normally
No light a) ECM power failure
b) Tilt sensor defective
c) Open in the tilt sensor circuit
d) Malfunctioning engine stop relay
e) Open in the engine stop relay circuit
f) Engine breaker not working properly
g) Open in engine stop switch circuit
h) The ignition switch is not working
i) Not good ECM
j) Blown fuse PGM-FI (20A)
k) Open circuit in engine stop circuit
l) Starter / ignition fuse blown (10A)
Engine fails to start
No lightAn open in the MIL circuit of the indicatorNot OK ECM Engine running fine
1 a) MAP sensor contact is off or not
b) Open in MAP sensor circuit
c) Malfunctioning MAP sensor
Engine is operating normally
2Vacuum hose MAP sensor is removed or disconnected Malfunctioning MAP sensor Engine is operating normally
7 a) Whether the contact of the FCT sensor moves away
b) Open or short in ECT sensor circuit
c) Faulty ECT sensor
Heavy engine start at low temperature
8 a) TP contact of the sensor moves away or not
b) Open or short in TP sensor circuit
c) Faulty TP sensor
Poor engine feedback on throttle opening
9 a) Whether the contact of the IAT sensor moves away or not
b) Open or short in IAT sensor circuit
c) c) AT sensor defective
Engine running normally
11 a) The contact of the speedometer sensor
b) An open or short in the speedometer sensor circuit
c) Speedometer sensor defective
Engine running normally
12 a) The contact of the injector No. 1 connector is removed or not
b) Open or short in injector No. 1 connector circuit
c) Injector No 1 defective
Engine does not start
13 a) The contact of the injector No. 2 connector is removed or not
b) Open or short in injector No. 2 connector circuit
c) c) Injector No. 2 is not working
The engine does not start
14 a) The contact of the injector No. 3 connector is removed or not
b) Open or short in injector No. 3 connector circuit
c) Injector No. 3 is not working
The engine does not start
15 a) The contact of the injector No. 4 connector is removed or not
b) Open or short in the injector No. 4 connector circuit
c) Injector No. 4 is not working
The engine does not start
18 a) Whether or not the contact of the pulse generator sensor connector moves away
b) Open or short in the pulse generator sensor connector circuit
c) Pulse generator sensor defective
Engine does not start
19 a) Whether or not the contact of the pulse ignition sensor departs
b) Open or short in the pulse ignition sensor circuit
c) c) Pulse ignition sensor defective
Engine does not start
21O2 sensor defective (California only)Engine is operating normally
23Faulty O2 heating sensor (California only)Engine is operating normally
33Damaged E2-PROM in ECM Engine running normallySelf-diagnosis not saved

Honda MIL Failure Codes

The PGM-FI MIL denotes the failure codes (the number of blinks from 0 to 54). When the indicator lights for 1.3 seconds, it is equivalent to ten blinks. For example; a 1.3 second illumination and two blinks (0.5 second x 2) of the indicator equals 12 blinks. Follow code 12 troubleshooting.

When more than one failure occurs, the MIL shows the blinks in the order of lowest number to highest number. For example; if the indicator blinks once, then seven times, two failures have occurred. Follow codes 1 and 7 troubleshooting.

Number of blinksCausesSymptoms
0No blinksFaulty ECMEngine does not start
0No blinksFaulty ECM (PGM-FI warning indicator output)Engine operates normally
0Stay litShort circuit in service check connector Faulty ECM (PGM-FI warning indicator output)Engine operates normally
1BlinkOpen or short circuit in MAP sensor line (in the ECM) Faulty MAP sensorPoor idle
7BlinksLoose or poor contact on ECT sensor
Open or short circuit in ECT sensor wire Faulty ECT sensor
Hard starting at a low temperature
(Simulate using numerical values; 90 C/194 F)
Cooling fan does not stop
8BlinksOpen or short circuit in TP sensor line (in the ECM)
Faulty TP sensor
Poor engine response when operating the throttle quickly (Simulate using numerical values; throttle open 0)
9BlinksOpen or short circuit in IAT sensor line (in the ECM)Engine operates normally
(Simulate using numerical values; 25 C/77 F)
12BlinksLoose or poor contact on injector connector
Open or short circuit in injector wire Faulty injector
Engine does not start
21BlinksLoose or poor contact on O2 sensor
Open or short circuit in O2 sensor wire
Faulty O2 sensor
Engine operates normally
54BlinksLoose or poor contact on bank angle sensor connector
Open circuit in bank angle sensor wire
Faulty bank angle sensor
Engine starts but stops after few seconds.

Honda XR 125 Motorcycle Problems :

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

Fault problems that can occur with yourHonda XR 125motorcycle engine is a blown head gasket. This can cause your engine to overheat and possibly crack the cylinder heads. In this case, it is best to take your Honda XR 125 motorcycle to a professional mechanic to have it checked out. Another common problem is with the carburetor. The carburetor is the part of your motorcycle that mixes air and fuel to create the combustion needed to power the engine.

Possible Failure Types :

  • Strange Honda XR 125 engine noise.
  • Honda XR 125 fog from engine.
  • Strange Honda XR 125 engine noise.
  • Honda XR 125 Vibrations and Rattling
  • Honda XR 125 Loud Acceleration
  • Honda XR 125 rusty exhaust
  • Honda XR 125 blockages in exhaust pipe
  • Honda XR 125 wear and tear exhaust
Honda Logo

Honda Motor Company is by far the world's biggest motorcycle maker. Honda's first motorcycle was born out of necessity in immediate post World War II Japan, where public transportation was desperately overcrowded and gasoline severely restricted.Honda's first bikes were very successful and supplies of the surplus engines ran out after a few months. Business was good by then, so he decided to manufacture his own motors. Using the surplus motor as a model, Honda designed and built his own 50cc engine.

Check other Honda 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-DavidsonĀ® 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 Honda 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.

Honda and logo are registered trademarks of Honda. 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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