Code 12. - Crankshaft Position Sensor
Symptom - No normal signals are received 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 sensor
- 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 opening 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
- improperly 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 temperature 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 30. - Lean angle sensor (Latch up detected)
Symptom - vehicle has overturned
Probable Cause
- Vehicle overturned
- Defective sensor
- Malfunction in ECU
- Improperly installed sensor
- Unable to start
- Unable to drive
Code 33.- Ignition Coil (Faulty ignition)
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
- Improperly 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
- improperly 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 received 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 (monitoring 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 diagnostic 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 deeper detail so please PM me if you need more info.
Symptom - No normal signals are received 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 sensor
- 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 opening 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
- improperly 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 temperature 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 30. - Lean angle sensor (Latch up detected)
Symptom - vehicle has overturned
Probable Cause
- Vehicle overturned
- Defective sensor
- Malfunction in ECU
- Improperly installed sensor
- Unable to start
- Unable to drive
Code 33.- Ignition Coil (Faulty ignition)
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
- Improperly 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
- improperly 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 received 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 (monitoring 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 diagnostic 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 deeper detail so please PM me if you need more info.