Instant Fuel Economy Inoperative/Incorrect

Tests 1 - 3:

SYMPTOM
INSTANT FUEL ECONOMY INOPERATIVE/INCORRECT

TEST NOTE
All symptoms listed above are diagnosed using the same tests. The title for the tests will be AVERAGE FUEL ECONOMY INOPERATIVE/INCORRECT.

POSSIBLE CAUSES
- Verify communication on CCD bus (INST/AVE MPG)
- Fuel level check (INST/AVE MPG)
- Vehicle speed signal check (INST/AVE MPG)
- No trouble found