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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 301 (ENGINE CONTROLS SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0171: FUEL TRIM SYSTEM LEANCONDITIONS FOR RUNNING DTC
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Conditions For Running DTC
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Conditions For Running DTC
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. 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 not set.
- Engine Coolant Temperature (ECT) is 68-230°F (20-110°C).
- Intake air temperature is 64-158°F (18-70°C).
- Manifold Absolute Pressure (MAP) is 15-105 kPa.
- Vehicle speed is less than 82 MPH.
- Engine speed is 550-4000 RPM.
- Barometric (BARO) pressure is more than 70 kPa.
- Mass Airflow (MAF) is 2.8-150.0 g/s.
- Fuel level 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.