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 MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 59 (ENGINE CONTROL SYSTEM - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0440: EVAP SYSTEMDIAGNOSTIC AIDS
2001 Chevrolet Cavalier LS, 2.4 T
Diagnostic Aids
2001 Chevrolet Cavalier LS, 2.4 TSECTION Diagnostic Aids
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
- To help locate intermittent leaks, use Evaporative Emissions System Tester (EEST - J 41413-200), or equivalent, to introduce smoke into EVAP system. Move all EVAP components while observing smoke with High Intensity White Light (J 41413-SPT), or equivalent.
- To improve the visibility of smoke exiting the EVAP system, observe the suspected leak area from different angles using the High Intensity White Light.
- A temporary blockage in EVAP purge solenoid, purge pipe or EVAP canister could cause an intermittent condition. Check and repair any restriction in EVAP system.
- Operating vehicle in CHECK MODE will increase the ability of the PCM to detect engine control system malfunctions. See SERVICE BAY TESTS under SELF-DIAGNOSTIC SYSTEM.
- For intermittent conditions, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 1.8L VIBE article.
- If the DTC cannot be duplicated, information included in freeze frame data can be useful in determining vehicle operating conditions when DTC was first set.
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.