Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Computer Command Control (CCC)
CCC is an electronically controlled exhaust emission system. It monitors several engine/vehicle functions and controls various operations, including the transmission torque converter clutch (TCC). The CCC system aids in the control of exhaust emissions while maintaining good fuel economy and driveability.
The Electronic Control Module (ECM) is the "brain" of the CCC system. The ECM controls engine systems to maintain good vehicle performance under all normal driving conditions.
The primary objective of the system is to maintain an ideal air/fuel ratio of 14.7:1. With this ratio maintained, the catalytic converter can effectively control nitrogen oxides (NOx), hydrocarbons (HC) and carbon monoxide (CO). For additional information, see appropriate article in the COMPUTERIZED ENGINE CONTROL section.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.