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.
Engine Control Module: Description and Operation
1999 Ford Taurus V6-3.0L DOHC VIN SSECTION Description and Operation
Powertrain Control Module (PCM):
The Powertrain Control Module (PCM) performs the following functions:
- The PCM accepts input from various engine sensors to compute the required fuel flow rate necessary to maintain a prescribed air/fuel ratio throughout the entire engine operational range.
- Then the PCM outputs a command to the fuel injectors to meter the appropriate quantity of fuel.
- The PCM determines and compensates for the age of the vehicle and its uniqueness, also automatically senses and compensates for changes in altitude (i.e. from sea level to mountains).
RENDER: 1.0x
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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.