All of these codes indicate that there is an internal malfunction in the ABS module. I will give you the diagnostic procedure for these codes, but it is pretty simple, if the code sets, replace the module. Let me know if you need more info.
DTC C0241-C0254 or C041-C054 Circuit Description
The ABS relay supplies battery voltage to 6 valve solenoids. The electronic brake control module (EBCM) microprocessor applies the grounds needed to activate each solenoid. The low side of each solenoid coil has a feedback circuit to the EBCM microprocessor. When a solenoid is commanded OFF, the feedback voltage is high. When a solenoid is commanded ON, the feedback voltage is low.
The EBCM detects an internal malfunction.
Action Taken When the DTC Sets
If equipped, the following actions occur:
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
An intermittent open/shorted solenoid DTC can be set by several different internal EBCM problems. Replace the EBCM if an open/shorted solenoid DTC continues to set intermittently.
Did you perform the ABS Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - ABS
Does the DTC set?
Go to Step 3
Go to Diagnostic Aids
Important: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure and the Trim Level Calibration procedure, if applicable.
Replace the EBCM. Refer to Electronic Brake Control Module Replacement .
Did you complete the replacement?
Go to Step 4
Does the DTC reset?
Ok thanks, XXXXX XXXXX this could be a ground or harness problem. I unplugged the connectors off the ABS mod and they looked good. What about the C0281 code?