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 PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 247 (ENGINE CONTROLS TROUBLESHOOTING - NO CODES - 3.8L)SYMPTOMSCUTS OUT, MISSESSENSOR/SYSTEM
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Cuts Out, Misses: Sensor/System
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Sensor/System
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for conditions which cause an incorrect idle speed. Check for throttle body tampering, excessive deposits, or damage. Check for restricted air intake system. Check for large vacuum leaks.
- Check the Throttle Position (TP) sensor and related circuit wiring. See DTC P0123: TP SENSOR CIRCUIT - HIGH VOLTAGE under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - 3.8L BONNEVILLE, GRAND PRIX, IMPALA, LESABRE, MONTE CARLO, PARK AVENUE & REGAL article.
- Check Exhaust Gas Recirculation (EGR) system for proper operation. See EXHAUST GAS RECIRCULATION under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING - 3.8L BONNEVILLE, GRAND PRIX, IMPALA, LESABRE, MONTE CARLO, PARK AVENUE & REGAL article.
- Check the Positive Crankcase Ventilation (PCV) valve for proper operation. See POSITIVE CRANKCASE VENTILATION under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING - 3.8L BONNEVILLE, GRAND PRIX, IMPALA, LESABRE, MONTE CARLO, PARK AVENUE & REGAL article.
- Check the transaxle range switch input with the vehicle in Drive and the gear selector in Drive or Overdrive.
- Check for bent harmonic balancer interrupter rings. See appropriate article in ENGINES. Check for damaged Crankshaft Position (CKP) sensor.
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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.