C0040 copies not done properly

The code refers to the right front wheel speed sensor. The fact it is intermittent says that you have a bad connection or a fractured wire or a bad ground. Check out the videos

C0040 - OBD II Trouble Code: Right Front Wheel Speed ...

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C0040 18: Code C0040 18 indicates the ABS module has detected the right front wheel speed sensor signal amplitude is below minimum. More OBD-II Codes. C003E.

Video Help

Do yourself a favor an take it to a qualified repair shop . You need a factory scan tool to see these code's
DTC C0040 00 : Right Front Wheel Speed Sensor Circuit No Additional Information
DTC C0040 0F : Right Front Wheel Speed Sensor Circuit Erratic Signal
DTC C0040 18 : Right Front Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

DTC C0899: Device Voltage Low
Circuit/System Description
The electronic brake control module (EBCM) monitors the battery voltage level available for system operation. A low voltage condition prevents the system from operating properly.

Circuit/System Testing
Measure the voltage at the battery terminals.
With scan tool, read the battery voltage in the EBCM data list.
? If less than 10 volts, test the ground circuit of the EBCM for high resistance. If the circuit test normal, test or replace the EBCM.
Go to Battery Inspection/Test and Charging System Test .

It is the right front (RF) ABS sensor that this codes corresponds to nothing to do with the rear.. Are you using a GM TECH 2 scanner? If not that is the problem.

Could be a bad ABS sensor on the hub?

GM has had intermittent problems with the ABS wiring breaking at the hub and they have a repair kit with new plugs that you can install. Also check TBS bulletins. I added link
Select Vehicle Year

c0040 right front abs sensor.
P0300 random or multiple misfire.
p0303 cylinder 3 misfire
this code P0300 and this one p0303 will be the same problem as they both same coding.
C0040 it can be the cable is cut or the sensor is defective.

C0040 ABS light on GM Saab Ricks Free Auto Repair Advice

C0040 is the suction fan, I believe it's the fan underneath the transport bed. Good luck!

Minolta copier show error code c0040. Please show me the picture that point of problem. The second problem. What is the way we could what kind of minolta di ...in the machine?thanks in advanced.

C0040, Suction Fan, failure to turn.
The fan under the transport belts is not working.
The fan will likely have to be replaced.

Hope this is of some help.
Ed

A C0040 error code indicates a problem with the suction deck fan. It has nothing to do with the paper lift motors.

The fan is accessed by removing the rear cover of the copier. It is right in the center. These are readily available (p/n 9313-1310-61) although they are not cheap (around $200 retail).