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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.3L)DIAGNOSTIC TESTSDTC P0440: EVAP SYSTEM - LARGE LEAKCODE ENABLE CRITERIA
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8
Code Enable Criteria
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Code Enable Criteria
WARNING: This page is about a different variant/trim than selected.
- System voltage is 10-18 volts.
- Start-up Engine Coolant Temperature (ECT) is 39-86°F (4-30°C), but start-up ECT is not more than 14°F (8°C) more than start-up Intake Air Temperature (IAT) temperature.
- Start-up IAT is 39-86°F (4-30°C), but start-up IAT is not more than 7°F (3°C) more than start-up ECT.
- Fuel tank level is 15-85 percent.
- Barometric pressure is more than 75 kPa.
- Vehicle Speed Sensor (VSS) is less than 75 MPH.
- DTCs P0107, P0108, P0110, P0112, P0113, P0115, P0117, P0118, P0121, P0122, P0123, P0125, P0443, P0449, P0452, P0453, P1106. P1107, P1111, P1112, P1114, P1115, P1121, or P1122 are not set.
DTC sets when EVAP system is not able to achieve or maintain vacuum during diagnostic test.
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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.