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.
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HOMESERVICE MANUALSCHEVROLET2002CAVALIER BASE, 4D SEDAN, 2.4 TREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS SELF-DIAGNOSTICS - 2.4LINSPECTION/MAINTENANCE PROCEDURESINSPECTION/MAINTENANCE SYSTEM DTCSDESCRIPTION
2002 Chevrolet Cavalier Base, 4D Sedan, 2.4 T
Inspection/Maintenance System DTCS: Description
2002 Chevrolet Cavalier Base, 4D Sedan, 2.4 TSECTION Description
The following DTCs are required to set system status to YES:
Catalyst System
- P0420 - Catalyst System Low Efficiency
EVAP System
- P0440 - EVAP System
- P0442 - EVAP System - Small Leak Detected
- P0446 - EVAP Canister Vent Blocked
- P1441 - EVAP System Flow During Non-Purge
Oxygen Sensor System
- P0133 - HO2S Slow Response
- P0140 - HO2S Circuit Insufficient Activity (Bank1; Sensor 2)
- P1133 - HO2S Insufficient Switching (Bank 1; Sensor 1)
Oxygen Sensor Heater System
- P0141 - HO2S Heater Performance (Bank 1; Sensor 2)
Diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
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.