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 CARSECTION 213 (ENGINE CONTROLS SELF-DIAGNOSTICS - 3.1L ENGINE)DIAGNOSTIC TESTSDTC P0171: FUEL TRIM SYSTEM LEANCONDITIONS FOR RUNNING TEST
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8
Conditions For Running Test
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Conditions For Running Test
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- DTCs P0101-P0103, P0107, P0108, P0121-P0123, P0130-P0135, P0137, P0138, P0140, P0141, P0201-P0206, P0300, P0401, P0403-P0405, P0410, P0440, P0442, P0446, P0506, P0507, P1404 or P1441 are not set.
- The Engine Coolant Temperature (ECT) sensor parameter is 68-230°F (20-110°C).
- The Intake Air Temperature (IAT) sensor parameter is 64-158°F (18-70°C).
- The Manifold Absolute Pressure (MAP) sensor parameter is greater than 2.1-15.2 psi (105 kPa).
- The vehicle speed is less than 82 MPH.
- The engine speed is 550-4000 RPM.
- The Mass Airflow (MAF) is between 2.8-150 g/s.
- The fuel level sensor parameter is more than 10 percent.
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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.