Diagnostic Aids
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Replacement receivers will have DTC B2805 and DTC C2121 stored in memory and will not clear until receiver is properly programmed. When receiver replacement is necessary, program all TPM sensors and RFA transmitters to replacement receiver. Check that receiver was not replaced without programming TPM sensors to that receiver.