F5C SPI Communication Failure - Replace Engine Controller (Chip Specific Fault). Follow The Appropriate Service Tool Procedure To Restore Self Learning Parameters. Amber
Injection Processor (CY33X) Error -SPI Communication Failure
If Inadequate air flow is problematic, so clogged air filters, evaporator core air flow restricted, faulty blower fan motors, defective blower switch or faulty wiring or loose connections.