With those codes, it looks to me that you need to replace your EBCM, but should be checked out by dealer to be sure. Here is what the codes mean:
C1126 Cruise Control Command Switch Assembly Circuit Failure
C1216- The EBCM monitors the On/Off state of each solenoid and recognizes when the
ABS is in pressure decrease too long. This fault indicates that the EBCM was
unable to decrease brake pressure enough to a certain wheel to prevent excessive
C1222 - Right Front Wheel Speed Sensor Input Signal is 0
C1223 - Left Rear Wheel Speed Sensor Input Signal is 0
C1224 - Right Rear Wheel Speed Sensor Input Signal is 0
C1233 - Right Front Wheel Speed Circuit Open or Shorted
C1245 - ABS Outlet Valve Coil LR Circuit Short To Ground
C1248 - EBCM Turned the Red Brake Warning Indicator On
C1254 - ABS Inlet Valve Coil RR Circuit Failure Abnormal Shutdown Detected
The microprocessor contains a data storage area, keep alive memory, which can save pertinent data when the ignition is turned OFF. The keep alive memory (KAM) data is lost if battery power or module ground is removed from the module. The KAM area is an integral part of the microprocessor and cannot be serviced separately.
Conditions for Running the DTC
The ABS conditions and the braking conditions are normal.
Conditions for Setting the DTC
The microprocessor calculates a checksum on those areas of memory that hold critical operation data. This is done at a regular interval and is called the periodic checksum. The microprocessor also calculates a checksum on these memory locations when ever new data is written to them. This is called the running checksum.
To check the keep alive memory (KAM), the microprocessor compares the periodic checksum to the running checksum. If they do not match, the microprocessor sets the DTC.
Action Taken When the DTC Sets
If equipped, the following actions occur:
- The EBCM disables the DRP/ABS/TCS for the duration of the ignition cycle.
- The EBCM disables the variable effort steering (VES) for the duration of the ignition cycle.
- The ABS indicator turns ON.
- The Traction Off indicator turns ON.
- The EBCM will not send serial data messages.
- The EBCM will not send the requested torque output to the PCM.
Conditions for Clearing the DTC
- The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
- The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected inXXXXXcycles.
Possible causes of this DTC are the following conditions:
- A loss of battery ground
- A disconnected battery
- A running reset A running reset is detected when the keep alive memory check sum is not updated properly.
- A sudden drop in the system voltage to less than 5 volts
- Long extended engine cranks that cause the battery voltage to drop
- Poor power or ground connections
- An internal EBCM malfunction
The numbers below refer to the step numbers on the diagnostic table.
2. Tests for an open in the ground circuits of the body control module.
4. Verifies the proper operation of the charging system.
6. Determines whether the DTC resets.