Fuel economy is not a fixed number.
It varies based on driving conditions,
driving habits and vehicle condition.
Therefore, it is not possible for one
set of estimates to predict fuel
economy
The following factors can lower your
vehicle’s fuel economy:
Aggressive driving (hard acceleration and braking)
Excessive idling, accelerating and braking in stop-and-go traffic
Cold engine ope
Vehicle Maintenance
A properly maintained vehicle
maximizes fuel economy. Poor
maintenance can significantly reduce
fuel economy. Always maintain your
vehicle according to the maintenance
m
Component Location Index
CATALYTIC CONVERTER
Removal/Installation
POWERTRAIN CONTROL MODULE (PCM)
General Troubleshooting information
Replacement
DTC Troubleshooting
DTC P0420: Catalyst System Efficiency Below
Threshold
NOTE:
Before you troubleshoot, record all f
1. Check for sound in each mode (AM, FM, XM, and
disc).
Is there sound from the speakers, and is the sound quality normal in each mode?
YES-Intermittent failure. The system is OK at this time. Check for loose
connections at the navigation unit, audio unit, amplifier, and each speaker.
NO-Speaker