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 257 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 2.2L)DIAGNOSTIC TESTSDTC P1441: EVAP SYSTEM FLOW DURING NON-PURGECONDITIONS 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 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- DTCs P0105, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0135, P0452, P0453, P0502, P0601, P0602, or P1621 not set.
- Engine is running.
- EVAP vent solenoid is commanded ON (closed).
- EVAP purge solenoid is commanded OFF (closed).
- Fuel level is 15-85 percent.
- Barometric Pressure (BARO) is greater than 21.3 in. Hg (75 kPa).
- Engine Coolant Temperature (ECT) and Intake Air Temperature (IAT) are 39°-86°F (4°-30°C) at engine start-up.
- ECT and IAT are within 15°F (8°C) of each other.
- Vehicle speed is less than 70 MPH (113 km/h).
- Throttle Position (TP) is 10-35 percent.
- DTC P1441 diagnostic runs once per ignition cycle, usually for 30 seconds if no faults exist, during the EVAP diagnostic system 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.