Possible Causes & Corrections
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
Check the following items:
- Check transmission for proper shifting and Torque Converter Clutch (TCC) system for proper operation.
- Visually check vacuum hoses for splits, kinks and proper connections as shown on vehicle emission control information label.
- Check fuel quality.
- Check for dragging brakes.
- Check for incorrect tire pressure.
- Check with operator to see if vehicle is operated under excessive acceleration or is heavily loaded.
- Check A/C for "full time" operation.
- Check coolant level. Check engine cooling system thermostat for proper heat range and operation.
- Check air filter, turbocharger and air intake system for a restriction.
- Inspect fuel delivery system. Check for low fuel pressure, restriction or air in fuel system. See BASIC FUEL SYSTEM CHECKS (DIESEL) in appropriate BASIC DIAGNOSTIC PROCEDURES article.