Chart 7
No Diagnostic Trouble Codes (DTCs) Present Symptom Charts
Chart 7
- Poor Fuel Economy
Note: Since driving styles can have a significant influence on fuel economy, verify the concern before starting an in-depth diagnosis.
Note: Excessive temperatures in the high voltage traction battery will cause the engine to run longer than normal to cool the high voltage traction battery and will result in reduced fuel economy. The high voltage traction battery cooling system should be checked for proper operation if there is no obvious cause for the additional cooling request. The following external factors may also contribute to poor fuel economy conditions:
- stop/go driving
- incorrect tire pressure/size
- vehicle loads (such as trailer towing)
- extended winter warm-up conditions
- high speed driving
- regenerative braking disabled
- high voltage traction battery temperatures
- incorrect axle ratio
- road/weather conditions
- aftermarket add-ons
- short run operations
- customer expectations
