- CAFE
- Calibration
- Calibration ID
- camshaft
- Camshaft Position Sensor
- CAN
- CAN-C
- CAN FD
- CAN Time-Out
- CARB
- Catalyst Efficiency
- Catalytic Converter
- CCA
- CEL
- Change Tire Size
- Charcoal Canister
- Charging Test
- CKP
- Clock Spring
- Clutch Adaptation
- CMP
- CNG
- Coding
- Compressor Clutch
- Control Arm Bushing
- Control Module
- Coolant Temperature Sensor
- Coolant Thermostat
- Cranking Test
- Crankshaft
- Crankshaft Position Sensor
- Current Code
- Current Ramp
- CV Axle
- CV Joint
- CVT
- CVT Reset
