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Strange code, there is a bulletin that explains this may be a brake issue or a engine computer issue.

If the vehicle has a current or history DTC: C012E symptom code 00 in the EBCM and a C12FE in the ECM, the vehicle has a brake issue. The technician needs to follow SI for DTC:C012E which has you perform a hydraulic test and a pedal travel test to assist in finding a brake issue
 2. If the vehicle has a current or history DTC: C012E symptom code 12 without a C012E symptom code 00 in the EBCM and a C12FE in the ECM, the code sets due to a powertrain code or a power down issue with the vehicle, this is not related to the brakes. Advise the technician to diagnose other DTCs or issues with the vehicle first.
 
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