Poor Fuel Economy
WARNING: This page is about a different variant/trim than selected.
- Suggest to the driver to read the Important Facts on Fuel Economy in the Owner Manual.
- Verify proper interpretation of the Average Fuel Economy value on the DIC. The Fuel Economy value should be reset periodically. Particularly if driving patterns, including load, terrain, etc., have changed significantly since the last Fuel Economy Reset.
- Suggest to the owner to fill the fuel tank and inspect the fuel economy.
- The following conditions can reduce fuel economy:
- Aftermarket body accessories that can affect wind flow over the vehicle. Including air deflectors, flares, etc.
- Heavy loads being carried or towed or the shape of large loads
- Extended idle time
- Acceleration rate too much or too often
- Incorrect tire size or air pressure
- Improper fuel quality and rating-Refer to Contaminants-in-Fuel Diagnosis and Fuel System Specifications .
- Aftermarket ECM calibrations
- Certain aftermarket air filters or air induction systems
- An air leak in the induction or engine systems.
- Fuel system issues-Inspect the injector balance rates. Refer to Fuel Injector Balance Test with GDS 2
- Brake system drag
- Air conditioning system improper operation
- Incorrect operation of the speedometer