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.
2003 Buick Century BaseFACTORY OEM SERVICE PROCEDURE
Conditions For Running Test
- Barometric Pressure (BARO) sensor parameter is more than 65 kPa.
- Engine Coolant Temperature (ECT) sensor parameter is 202-212°F (94-100°C).
- Intake Air Temperature (IAT) sensor parameter is 59-167°F (15-75°C).
- Engine is in closed loop fuel control.
- Engine has run 6-8 minutes off idle to initiate test.
- Battery voltage is 10-18 volts.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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