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Discussion Starter #1 (Edited)
Code 12.-Crankshaft Position Sensor
Symptom-No normal signals are recieved from the crankshaft position sensor.
Probable Cause
malfunction in pickup rotor
malfunction in ECU
improperly installed sensor
Unable to start
unable to drive

Code 13.-Intake or air presser sensor(Open or Short Circuit)
Symptom-open or short circuit detected.
Probable Cause
open/short circuit in wire harness
Malfunction in ECU
Defective air pressure senson
Able to start
Able to drive

Code 14.-Intake air pressure(Pipe System)
Symptom-Pipe system malfunction (clogged or detached hose)
Probable Cause
Intake air pressure sensor hose is clogged detached kinked or pinched.
clog in the openeing of the intake air pressure sensor.
Able to start
Able to drive

Code 15.-Throttle position sensor
Symptom-Open or Short Circuit
Probable Cause
Open/short circuit in harness
defective sensor
malfunction in ECU
improperley installed sensor
Able/Unable to start
Able/Unable to drive

Code 21.-Coolant temp sensor
Symptom-Open or short circuit detected
Probable Cause
Open/short circuit in wire harness
defective sensor
Malfunction in ECU
Improperly installed sensor
Able to start
Able to drive

Code 22.-Intak air tempature sensor
Symptom-Open or short circuit detected
Probable Cause
Open/short circuit in wire harness
defective sensor
Malfunction in ECU
Improperley installed sensor
Able to start
Able to drive

Code 30.-Lean anlge sensor(Latch up detected)
Symptom-vehicle has overturned
Probable Cause
Vehicle overturned
Defective sensor
Malfuntion in ECU
Improperley installed sensor
Unable to start
Unable to drive

Code 33.-Ignition Coil(Faulty ingnition)
Symptom-Malfunction detected in the primary wire of the ignition coil
Probable Cause
Open/short circuit in wire harness
Malfunction in coil
Malfunction in ECU
Improperley installed ignition coil
Unable to start
Unable to drive

Code 37.-ISC valve (stuck fully open)
Symptom-Fast Idle
Probable Cause
defective speed sensor
Open/short circuit in wire harness
malfunction in throttle body
malfunction in throttle cable
defective ISC
ISC stuck fully open
Hose coming off
Leak in intake path
Malfunction in ECU
Able to start
Able to drive

Code 39.-Injector (open circuit)
Symptom-Injector: open or short circuit
Probable Cause
Open/short circuit in wire harness
defective injector
malfunction in injector
malfunction in ECU
improperley installed injector
Unable to start
Unable to drive

Code 41.-Lean Angle Sensor(Open or Short circuit)
Symptom-Lean Angle Sensor:Open or short circuit detected
Probable Cause
Open/short circuit in wire harness
defective sensor
Malfunction in ECU
Unable to start
Unable to drive

Code 42.-Speed Sensor
Symptom-No normal signals recieved from speed sensor
Probable Cause
Open/short circuit in wire harness
defective sensor
Malfunction in ECU
Able to start
Able to drive

Code 43.-Fuel System Voltage
Symptom-The ECU is unable to monitor the battery voltage
Probable Cause
Open/short circuit in wire harness
malfunction in main relay
malfunction in ECU
Able to start
Able to drive

Code 44.-Error in writing the amount of CO adjustment on EEPROM
Symptom-Error is detected while writing the EEPROM (CO adjustment value)
Probable Cause
Malfunction in ECU(The CO adjustment value is not properly written on or read from the internal memory).
Able to start
able to drive

Code 46.-Vehicle system power(monitering voltage)
Symptom-Power supply to the injection system is not normal
Probable Cause
Malfunction in charging system
Able to start
Able to drive

Code 50.-ECU internal malfunction(memory check error)
Symptom-Faulty ECU memory (When this malfunction is detected in the ECU, the fault code might not appear on the FI diagnotic tool.)
Probable Cause
Malfunction in ECU
Unable to start
Unable to drive

I hope this helps everyone get a general idea what the codes are telling you if you need anything else I have a manual that goes into deaper detail so please PM me if you need more info.
 

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Thanks, Foxracingwade

Is this pinned on the Maintenance, or Repair Section? If not, it should be. It took me several searches to find this thread that clearly identified the solution to why my Check Engine Light was on.
 

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These codes are pretty damn helpful, lead me straight to the problem. I forgot to put the Intake air pressure sensor hose back on after i had the throttle body off.
 

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Thanks, Foxracingwade

Is this pinned on the Maintenance, or Repair Section? If not, it should be. It took me several searches to find this thread that clearly identified the solution to why my Check Engine Light was on.
What was wrong with your quad - my engine light stays on as well?
 

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My engine lights on after I installed my fci the only things I unplugged was the intake sensor and the silaniod by the battery I'm running no airbox I modified my stock one so I could bolt the crank case breather up got it back together it cranks but engine lights on no blinks just stays on I ve ordered a ltr breather box haven't got it yet is why I ve mc givered this could it be that that throwing the code or the intake air sensor also should I silicon around where the sensor goes in the tube it's got me wondering if its air tight thanks in advance for any help
 

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My engine lights on after I installed my fci the only things I unplugged was the intake sensor and the silaniod by the battery I'm running no airbox I modified my stock one so I could bolt the crank case breather up got it back together it cranks but engine lights on no blinks just stays on I ve ordered a ltr breather box haven't got it yet is why I ve mc givered this could it be that that throwing the code or the intake air sensor also should I silicon around where the sensor goes in the tube it's got me wondering if its air tight thanks in advance for any help
Kill switch hooked up? All the wires hooked up properly?

When I installed my FCI I never had a code be thrown.
 

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Yea I'm goin un do em in the mornin try again maybe that air sensors dirty I dunno
 

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Ok mines three slow blinks and one fast one ice checked everything an it look good this blows
 

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Well pretty sure I figured it out took the air intake sensor out an it was bent I barely put any pressure on it and it broke guess it happened putting it in it was a little hard goin in
 

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These codes are pretty damn helpful, lead me straight to the problem. I forgot to put the Intake air pressure sensor hose back on after i had the throttle body off.
Just did the same thing.... You would think after years of working on these things we would remember all of this all of the time LOL
 

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Hey guys I'm getting one long and two short witch I think is code 12 I've upluged everything and cleaned and plug it back in and it still blinks has anyone else have this code before
 
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