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OKI Error Codes

Refer to the following OKI Fatal Error Codes for instructions on how to resolve your error. If the error persists, or you require assistance, speak to one of our OKI trained technical support specialists.

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OKI Error Code Support

OKI Shop Technical Support: Mon-Fri 9am-5pm only. (Closed Sat & Sun.)
UK & Ireland business customers only.
We aim to respond to all support requests within 4 working hours.
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Panel DisplayCauseCheck DetailsResultSolutionRequest a Callback
Service Call 001 ErrorMachine Check
Exception hardware problem was detected (PCB failure or insufficient power capacity)
(PDL only)
When CE1 was not detected, SC001 occurs
Replace the printer control PCB
Power Off/On
002:Error
003:Error
005:Error
CPU unexpected exceptionDoes this error message reappear?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
012:Error
A watchdog timeout occurred due to no system timer interrupt for unknown reasonsDoes this error message reappear?YesPower OFF/ON

Replace the printer control PCB
Service Call
020:Error
The CU FW in Nand FLASH has not been detected or a check SUM error has occurredDoes this error message reappear?YesPower OFF/ON

Replace the printer control PCB
Service Call
024:Error
CU Font ROM Hash ErrorDoes this error message reappear?YesPower OFF/ON

Replace the printer control PCB
Service Call
030:Error
CU RAM Check ErrorDoes this error message reappear?YesPower OFF/ON

Replace the printer control PCB
Service Call
040: Error
CU EEPROM ErrorDoes this error message reappear?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
042:Error
043:Error
045:Error
Flash File System ErrorFailed to access to the Flash ROM that is mounted directly on the CU PCBFormat the Flash forcibly. (This requires caution as it erases NIC-F/W.
The NIC-F/W must be written with the maintenance utility after formatting.) If the error remains replace the printer control PCB
Service Call
051: Error
CU Fan Error
Abnormal condition of the CPU cooling fan on the CU PCB
Is the CPU Fan connected properly?


Does it recover from the error by replacing the fan?
No
Yes

No
Connect it properly.
Replace the fan.

Replace the printer control PCB.
Power Off/On
052:Error
DMA Abort Error was detected with Image ProcessorDoes this error message reappear?YesPower OFF/ON

Replace the printer control PCB
Service Call
067: Error
A communication error was detected during communication with the Sleep Mode interface monitoring program.If power cycling does not solve the problem maintenance by a service engineer is required
Service Call
069:Error
Malfunction of the NIC chip was detectedDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
070:Error
Detection of abnormal condition of the PostScript firmwareDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
072:Error
I/F error between PU and CUDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
073:Error
xxxxxxxx
Detection of abnormal condition during image data expansionDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
074:Error
xxxxxxxx
075:Error
xxxxxxxx
Detection of abnormal condition during image data expansionDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
077:Error xx
Detection of abnormal condition during image data expansionDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Service Call
081:Error
Does this error recur?YesPower OFF/ON

Replace the printer control PCB
Service Call
104:Error
The engine EEPROM implementation check at power on showed no problem, but after that a read/write error was detectedDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Service Call
106:Error
Abnormal engine control logicDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Service Call
108:Error
01: Detection of a watchdog timer errorDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
02: Detection of an undefined interruptionDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
03: Runaway of the CPU on the PU due to noise etc.Does this error recur?YesPower OFF/ON

Replace the printer control PCB
04: Runaway of the Port CPU due to noise etc.Does this error recur?YesPower OFF/ON

Replace the printer control PCB
05: Failure of Access to the Dcon circuit of the printer control PCBDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
09: Detection of an error in clock adjustment to the duplex unitDoes this error message reappear after power restoration

Does this error message reappear after power restoration?
Yes


Yes
Replace the unit concerned


Replace the Printer Control PCB
0B: Detection of an error in clock adjustment to tray 2 Does this error message reappear after power restoration

Does this error message reappear after power restoration?
Yes


Yes
Replace the unit concerned


Replace the Printer Control PCB
0C: Detection of an error in clock adjustment to tray 3Does this error message reappear after power restoration

Does this error message reappear after power restoration?
Yes


Yes
Replace the unit concerned


Replace the Printer Control PCB
0D: Detection of a error in clock adjustment to tray 4Does this error message reappear after power restoration

Does this error message reappear after power restoration?
Yes


Yes
Replace the unit concerned


Replace the Printer Control PCB
0E: Detection of a error in clock adjustment to tray 5Does this error message reappear after power restoration

Does this error message reappear after power restoration?
Yes


Yes
Replace the unit concerned


Replace the Printer Control PCB
0F: Communication failure with the spot color PCBDoes this error recur?

Does this error recur?
Yes

Yes
Power OFF/ON

Replace the spot color PCB

Replace the printer control PCB
10: Runaway of the Driver CPU due to noise etc.Does this error recur?

Does this error recur?
Yes

Yes
Power OFF/ON

Replace the driver relay PCB

Replace the printer control PCB
Service Call
111:Error
A duplex unit for another model was detectedIs a duplex unit provided for this model installed?YesInstall a correct duplex unit
Service Call
112:Error
A 2nd Tray for another model was detectedIs a 2nd Tray provided for this model installed?YesInstall a correct 2nd Tray
Service Call
113:Error
A 3rd Tray for another model was detectedIs a 3rd Tray provided for this model installed?YesInstall a correct 3rd Tray
Service Call
114:Error
A 4th Tray for another model was detectedIs a 4th Tray provided for this model installed?YesInstall a correct 4th Tray
Service Call
115:Error
A 5th Tray for another model was detectedIs a 5th Tray provided for this model installed?YesInstall a correct 5th Tray
Service Call
121:Error
High Voltage power supply interface errorIs the fuse on the printer control PCB blown?

Is the cable connecting the printer control PCB to the high voltage power supply unit connected properly?



Is there any defective contact point?
Yes


No

Yes



No
Replace the printer control PCB (then check the following)

Re-connect it properly.

Check for defective contact points of the high voltage system

Replace the high voltage power supply unit.
Service Call
123:Error
Abnormal environment humidity or unconnected humidity sensorDoes this error recur?


Does this error recur?
Yes


Yes
Power OFF/ON

Replace the environmental sensor board and the FFC

Replace the printer control PCB
Service Call
124:Error
Abnormal environment humidityDoes this error recur?


Does this error recur?
Yes


Yes
Power OFF/ON

Replace the environmental sensor board and the FFC

Replace the printer control PCB
Service Call
125:Error
Multi-purpose Tray
Home Error
Does the motor run in the motor testing of the PU self-diagnostic mode?Yes





No
Check the sensor cable for a break or short and the connector semi-locking relay PCB and the printer control PCB for abnormal condition.

Check the hopping motor and the gear train for abnormal condition.
Power Off and wait for a while
126: Condensing Error
Dew condensation in the printer was detected.This error tends to occur after a printer is carried in from the outsides.
Leave the printer for 2 hours to half a day at room temperature, and turn on the power.

Does this error recur?


Does this error recur?

Yes


Yes
After leaving the printer at room temperature, turn on the power again.



Replace the environmental sensor board and the FFC.

Replace the printer control PCB
Service Call
128:Error
01: Fuser Exhaust
Fan 1
02: Low Voltage Fan
03: PU Fan
05: Station 1 ID
Intake Fan
09: Second Transfer
Absorption Fan
0A: Fuser Intake Fan
0B: Station 2 ID
Intake Fan
0C: Duplex Fan
0D: Fuser Exhaust
Fan 2
0E: Station 3 ID
Intake Fan
0F: Station 4 ID
Intake Fan
10: Station 5 ID
Intake Fan
Is the cable to respective fans connected properly?

Does this error recur?
No


Yes

No

Re-connect it properly.


Replace the fan motor.

Replace the applicable PCB
01: Driver relay PCB
02: Printer Control PCB
03: Printer Control PCB
05: Driver Relay PCB
09: Rail unit relay PCB
0A: Driver relay PCB
0B: Driver relay PCB
0C: Duplex unit PCB
0D Driver relay PCB
0E: Driver relay PCB
0F: Driver relay PCB
10: Driver relay PCB

Service Call
134: Error
LED head detection error
(01=K, 02=C, 03=M, 04=Y, 05=W/CL)
Is the fuse blown?
134-5: Spot color PCB
134-01 to 04: Printer
control PCB




Does this error recur?

Does this error recur?
Yes




No


Yes

Yes
Replace the PCB.
Correct the FFC connection condition between the LED head and the PCB

Correct the FFC connection condition.

Replace the LED head unit

Replace either applicable PCB.
134-01 to 04:
Printer control PCB
134-05: Spot color PCB
Service Call
135: Error
01: Tray 1 Lift-up
Motor Error
02: Tray 2 Lift-up
Motor Error
03: Tray 3 Lift-up
Motor Error
04: Tray 4 Lift-up
Motor Error
05: Tray 5 Lift-up
Motor Error
Remove the paper cassette. Does the motor run in motor testing?



Is the fuse on the PCB blown?

Is the motor resistant value abnormal, or is the motor wire disconnected or shorted?
Yes

No


Yes

Yes

No
Replace the paper cassette.

Do the following check on motors and PCBs:

Replace the PCB.

Replace the motor.

Replace the PCB.
01: Printer Control PCB
02 to 05: Option tray PCB
07: Belt Motor Lock ErrorRemove the belt unit. Does the motor run in motor testing?



Is there any abnormality with the mechanism, such as a blown motor fuse, a disconnected or shorted motor wire, and a broken gear?
Yes

No


Yes


No
Replace the Belt.

Do the following check on motors and PCBs:

Replace the motor, cable and belt motor driving mechanism.

Replace the printer control PCB
Service Call
135: Error
09: Fuser Motor Lock ErrorRemove the fuser. Does the motor run in motor testing?



Is there any abnormality with the mechanism, such as a blown motor fuse, a disconnected or shorted motor wire and a broken gear?
Yes

No


Yes


No
Replace the fuser.

Do the following check on motors and PCBs:

Replace the motor, cable, fuser motor driving mechanism.

Replace the printer control PCB
11: Station 1 ID Motor Lock Error
12: Station 2 ID Motor Lock Error
13: Station 3 ID Motor Lock Error
14: Station 4 ID Motor Lock Error
15: Station 5 ID Motor Lock Error
Remove the ID unit. Does the motor run in motor testing?



Is the motor fuse blown?

Is the motor wire broken or shorted

Does the error recur?
Yes

No


Yes

No

Yes
Replace the ID unit.

Do the following check on motors and PCBs:

Replace the motor.

Replace the driver relay PCB

Replace the ID motor driving mechanism
Service Call
143: Error
Image drum Up/Down position detection error
(01=K, 02=C, 03=M, 04=Y, 05=W/CL)
Reinstall the ID unit and the belt unit and then power off/on. Does the error recur?

Detach the ID unit. Remove the rear cover and inspect the initial movement. Is there any abnormality with up/down movement?
Yes



No

Yes
Inspect the following:



Replace the ID unit.

Inspect the driver replay PCB, ID up/down sensor, ID motor driving mechanism.
Service Call
147: Error
Toner supply motor
error (01=K, 02=C, 03=M, 04=Y, 05=W/CL)
Remove the toner cartridge. Does the motor run in motor testing?



Is the motor resistant value abnormal, the motor wire disconnected or shorted?

Does the error recur?
Yes

No


Yes

No

Yes
Replace the toner cartridge.

Do the following check on motors and PCBs

Replace the motor.

Replace the driver relay PCB

Replace the Toner supply mechanism.
Service Call
163: Error
Toner sensor detection error
(01=K, 02=C, 03=M, 04=Y, 05=W/CL)
This error does not occur with the factory default settings.
Is the stopper (orange) removed?

Is the ID unit prism soiled?


Does this error recur?


Does this error recur?
No


Yes
No

Yes


Yes
Remove the stopper.


Clean it.
Replace the ID unit.

Replace the driver replay PCB

Replace the toner low sensor board and the cable.
Service Call
166: Error
An abnormality was detected with the power supply temperature thermistor.
01: The power supply thermistor is detected as shorted.
02: The power supply thermistor is detected as open.
03: The power supply thermistor indicates high temperature error
04: The power supply thermistor indicates low temperature error
Does this error recur?

YesPower OFF/ON

Replace the printer control PCB
Service Call
167: Error
Thermistor slope errorIs the error message displayed?

Does this error recur?
Yes

Yes
Restore the power

After leaving the printer for 30 minutes, turn on the power
Service Call
168: Error
01: Thermistor is
detected as shorted
02: Thermistor is
detected as open
03: Thermistor is
indicates high
temperature error
04: Thermistor indicates
low temperature
error
Is the error message displayed?

Does this error recur?
Yes

Yes
Restore the power

After leaving the printer for 30 minutes, turn on the power again. When the power is restored for the 168-03 error, the display changes to Service Call 994: Error
Service Call
169: Error
01: Thermistor is detected as shorted
02: Thermistor is detected as open
03: Thermistor is indicates high temperature error
04: Thermistor indicates low temperature error
Is the error message displayed?

Does this error recur?
Yes

Yes
Restore the power.

After leaving the printer for 30 minutes, turn on the power again.
Service Call
170: Error
171: Error
Short circuit (170) or open circuit (171) of the fuser thermistor was detected.Does this error recur?YesRestore the power.
Replace the fuser unit.
Service Call
172: Error
173: Error
An abnormal (172: high or 173: low)
temperature of the fuser thermistor was
detected
Does this error recur?YesRestore the power.
Replace the fuser unit.
When the power is restored, the display may change to Service Call 994: Error in some cases.
Service Call
181: Error
182: Error
183: Error
184: Error
185: Error
Option unit I/F error
(181 = Duplex Unit.
182, 183, 184, 185 = Optional Tray)
Does this error recur?YesRestore the power.
Check to make sure the contact points of the connector and replace the optional unit

Service Call
188: Error
01: Error in
communication
with Port CPU
Does this error recur?YesPower OFF/ON

Replace the printer control PCB
02: Error in
communication
with Driver CPU
Does this error recur?YesReplace the Driver PCB
Power Off/On
190: Error
System memory overflowDoes this error recur?YesPower OFF/ON

Replace the printer control PCB
Power Off/On
203: Error
204: Error
CU program error (not occur in normal operation)Does this error recur? YesPower OFF/ON

Replace the printer control PCB
Power Off/On
207: Error
208: Error
CU program error (not occur in normal operation)Does this error recur? YesPower OFF/ON

Replace the printer control PCB
Power Off/On
213: Error
214: Error
CU program error (not occur in normal operation)Does this error recur? YesPower OFF/ON

Replace the printer control PCB
Serice Call
230: Error
Tag Reader MissingDoes this error recur?

Does this error recur?
Yes

Yes
Power OFF/ON

Replace the tag reader/writer PCB and the FFC.

Replace the printer control PCB
Service Call
231: Error
01: PU-Tag Reader Interface Error
02: Tag Reader circuit abnormality
03: Tag Interface error
Does this error recur?

Does this error recur?
Yes

Yes
Power OFF/ON

Replace the tag reader/writer PCB and the FFC.

Replace the printer control PCB

Service Call
241: Error

245 Error
Engine Program
Memory Error
241: DUPLEX Flash memory error
242: Option Tray 2
243: Option Tray 3
244: Option Tray 4
245: Option Tray 5
Does this error recur?YesPower OFF/ON

241: Replace the DUPLEX PCB.
242-5: Replace the option try PCB

Service Call
247: Error
Engine PORT CPU
Program Memory Error
Does this error recur?Yes

Power OFF/ON

Replace the printer control PCB

Service Call
249: Error
Engine DRIVER
CPU Program Memory Error
Does this error recur?Yes

Power OFF/ON

Replace the printer control PCB

Power Off/On
250: Error
Secure File Erasing ErrorAn encrypted file erasing error was detected.
Did the user accept to execute HDD ERASE?

ADMIN MENU
HDD ERASE
Informing the user of the necessity to execute Disk
ERASE to delete the encrypted file and restore the HDD defaults
Service Call
251: Error
Secure Disk Erasing ErrorAn Error was detected during Disk ERASE. Does this error message reappear?YesPower OFF/ON

Replace the HDD
Service Call
254: Error
An unexpected error occurred during initialization of the Security mode.
Error cause information is displayed after the error code number
Does this error message reappear?YesPower OFF/ON

Regenerate an encryption key. If it doesn't solve the problem, replace the CU PCB

Service Call
257: Error
An unexpected error occurred during initialization of the HDD
Error cause information is displayed after the error code number
Does this error message reappear?YesPower OFF/ON

Format the HDD again. If it does not solve the problem, replace the HDD
Service Call
260: Error
Heater thermistor errorCycle the power.

Replace the Fuser Unit.

If error not cleared, power OFF and check conditions of cables between CU/PU board (ME2 PCB) and the relay board (MER PCB) and the Fuser Unit.

If no damage to cables replace CU/PU board (ME2 PCB) and the relay board (MER PCB).
Service Call
261: Error
Heater side1 thermistor error (L)
Service Call
262: Error
Heater side2 thermistor error (L)
Service Call
263: Error
Heater side1 thermistor error (R)
Service Call
264: Error
Heater side2 thermistor error (R)
Service Call
265: Error
Lower1 thermistor error (L)
Service Call
266: Error
Lower2 thermistor error (L)
Service Call
267: Error
Lower3 thermistor error (L)
Service Call
268: Error
Lower1 thermistor error (R)
Service Call
269: Error
Lower2 thermistor error (R)
Service Call
270: Error
Lower3 thermistor error (R)
Service Call
271: Error
Center NC sensor detecting error
Service Call
272: Error
Center NC sensor compensating error
Service Call
273: Error
Center NC sensor temperature after compensating error
Service Call
274: Error
Error detecting the Fuser Unit cover temperaturePower OFF/ON

If error not cleared, power OFF and check conditions of cables between CU/PU board (ME2 PCB) and the relay board (MER PCB) and the Fuser Unit.

If no damage to cables replace CU/PU board (ME2 PCB) and the relay board (MER PCB).
Power Off/On
901: Error
902: Error
Short circuit (901) or open circuit (902) with the belt thermistor was detectedCheck the belt thermistor wiring. Is there any abnormal condition with the belt unit, contact substrate which is the tag terminal PCB of the printer unit, or the cable?Yes


No
Replace the part or the belt unit.

Replace the driver relay PCB
Power Off/On
903: Error
904: Error
The belt thermistor detected abnormal temperature.
903: too high
904: too low
Check the belt thermistor wiring. Is there any abnormal condition with the belt unit, contact substrate which is the tag terminal PCB of the printer unit, or the cable?Yes


No
Replace the part or the belt unit.

Replace the driver relay PCB
Inspection is required.
980 : Error
Media jamming error around fuser.Media is jammed by entangling around the fuser.
Turn off the MFP.
Replace the fuser.
Inspection is required.
990 : Error
Waste toner sensor detection errorIs the K toner cartridge installed?

Does the error occur again?
No


Yes
Install the K toner cartridge.

Be sure of cable connection, and then perform board replacement.
Service Call
993: Error
An error was detected with the paper thickness sensor power cableDoes this error recur?

Does this error recur?
Yes


Yes
Power OFF/ON

Replace the paper thickness sensor and the cable

Replace the printer control PCB
Service Call
994: Error
A fuser where a high temperaure error was detected is installedDoes this error recur?YesPower OFF/ON

Replace the fuser unit
Power Off/On
FOC: Error
CU program errorDoes this error recur?YesPower OFF/ON

Replace the Printer control PCB
Power Off/On
FFF: Error
CU program errorDoes this error recur?YesPower OFF/ON

Replace the Printer control PCB
Note:
Service call errors, 171: Error, 166-02: Error, 168-02: Error, 169-02: Error 0169-04: Error and 902: Error can occur when the printer temperature is under 0 degrees centigrade; therefore, if the printer temperature is low, turn on the printer after the printer temperature has risen enough.