Fault Codes listed in the FZ6 Service Manual:

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Fault Code: 12
Diagnostic Code: --
Symptom: No normal signals are received from the crankshaft position sensor.
Probable cause of malfunction:

Open or short circuit in wiring harness.
Defective crankshaft position sensor.
Malfunction in pickup rotor.
Malfunction in ECU.
Improperly installed sensor.

Fault Code: 13
Diagnostic Code: 03
Symptom: Intake air pressure sensor-open or short circuit detected.
Probable cause of malfunction:

Open or short circuit in wiring sub lead.
Open or short circuit in wiring harness.
Defective intake air pressure sensor.
Malfunction in ECU.

Fault Code: 14
Diagnostic Code: 03
Symptom: Faulty intake air pressure sensor pipe system
Probable cause of malfunction:

detected hose
clogged hose
Intake air pressure sensor hose is detached, clogged,
kinked, or pinched.
Malfunction in ECU.

Fault Code: 15
Diagnostic Code: 01
Symptom: Throttle position sensor-open or short circuit detected.
Probable cause of malfunction:

Open or short circuit in wiring sub lead.
Open or short circuit in wiring harness.
Defective throttle position sensor.
Malfunction in ECU.
Improperly installed throttle position sensor.

Fault Code: 16
Diagnostic Code: 01
Symptom: A stuck throttle position sensor is detected.
Probable cause of malfunction:

Stuck throttle position sensor.
Malfunction in ECU. 01

Fault Code: 19
Diagnostic Code: 20
Symptom: Open circuit in the input line of ECU No4 terminal is detected when the start switch is pressed.
Probable cause of malfunction:

Open circuit in wiring harness (ECU coupler).
Malfunction in ECU.

Fault Code: 21
Diagnostic Code: 06
Symptom: Coolant temperature sensor-open or short circuit detected.
Probable cause of malfunction:

Open or short circuit in wiring harness.
Defective coolant temperature sensor.
Malfunction in ECU.
Improperly installed sensor.

Fault Code: 22
Diagnostic Code: 05
Symptom: Intake air temperature sensor-open or short circuit detected.
Probable cause of malfunction:

Open or short circuit in wiring harness.
Defective intake temperature sensor.
Malfunction in ECU.
Improperly installed sensor.

Fault Code: 30
Diagnostic Code: 08
Symptom: The motorcycle has overturned.

Probable cause of malfunction:
Overturned.
Malfunction in ECU.

Fault Code: 33
Diagnostic Code: 30
Symptom: Open circuit is detected in the primary lead of the ignition coil (# 1, #4).
Probable cause of malfunction:

Open circuit in wiring harness.
Malfunction in ignition coil.
Malfunction in ECU.
Malfunction in a component of ignition cut-off circuit system.

Fault Code: 34
Diagnostic Code: 31
Symptom: Open circuit is detected in the primary lead of the ignition coil (# 2, #3).
Probable cause of malfunction:

Open circuit in wiring harness.
Malfunction in ignition coil.
Malfunction in ECU.
Malfunction in a component of ignition cut-off circuit system.

Fault Code: 41
Diagnostic Code: 08
Symptom: Lean angle cut-off switch-open or short circuit detected.
Probable cause of malfunction:

Open or short circuit in wiring harness.
Defective lean angle cut-off switch.
Malfunction in ECU.

Fault Code: 42
Diagnostic Code: 07, 21
Symptom: No normal signals are received from the speed sensor; or, an open or
short circuit is detected in the neutral switch.
Probable cause of malfunction:

Open or short circuit in wiring harness.
Defective speed sensor.
Malfunction in vehicle speed sensor detected unit.
Defective neutral switch.
Malfunction in the engine side of the neutral switch.
Malfunction in ECU.

Fault Code: 43
Diagnostic Code: 09
Symptom: Supply power to the injector and fuel pump is not normal
Probable cause of malfunction:

Open circuit in wiring harness. (red/blue line or blue/yellow line)
Malfunction in ECU.

Fault Code: 44
Diagnostic Code: 60
Symptom: An error is detected while reading or writing on EEPROM.
Probable cause of malfunction:

Malfunction in ECU. (The CO adjustment value is not properly written on or read from the internal memory).

Fault Code: 46
Diagnostic Code: --
Symptom: Power supply to the FI system is not normal.

Probable cause of malfunction:
Malfunction in "CHARGING SYSTEM".

Fault code: 50
Diagnostic Code: --
Symptom: Faulty ECU memory. When this malfunction is detected, the code
number might not appear on the meter.
Probable cause of malfunction:

Malfunction in ECU. (The program and data are not
properly written on or read from the internal memory.)

Fault code: Er-1
Diagnostic Code: --
Symptom: No signals are received from the ECU.
Probable cause of malfunction:

Open or short circuit in wiring sub lead.
Malfunction in meter.
Malfunction in ECU.

Fault code: Er-2
Diagnostic Code: --
Symptom: No signals are received from the ECU within the specified duration.
Probable cause of malfunction:

Improper connection in wiring sub lead.
Malfunction in meter.
Malfunction in ECU.

Fault code: Er-3
Diagnostic Code: --
Symptom: Data from the ECU cannot be received correctly.
Probable cause of malfunction:

Improper connection in wiring sub lead.
Malfunction in meter.
Malfunction in ECU.

Fault code: Er-4
Diagnostic Code: --
Symptom: Non-registered data has been received from the meter.
Probable cause of malfunction:

Improper connection in wiring sub lead.
Malfunction in meter.
Malfunction in ECU.