What is the meaning of CHECK ENGINE ZONE for my ford expedetion 2003 v8 gasoline

u are going to have to change it all

Manufacturer General Motors Corporation Make GMC Model Year 2003 Model Sierra Engine Series V-8 4.8L Engine Capacity V8, 4.8L Fuel Type Gasoline Vehicle Type Pickup Truck Country United States

check the sensor on pass side wheel. if it fails the speedo will stop working and the auto box will not know what speed you are doing to change gear.

Check the drivers side door around the latch

This Expedition has the 5.4L V8 engine.

Hi,


The check engine light comes on mostly when you have bad gas tank cup,or you don't tight enough the gasoline.Go to any auto-zone and request the obd scanner,at no charge just leave your driver license or credit card,connect the scanner follow the instructions.They will check up and the check engine light will come off in the next 3 to 5 days.


Thank you !!

sounds like a o2 sensor code to me

The code may go away by itself after a few restarts. You can also try clearing the code by taking the vehicle Auto Zone, Advance Auto or another chain parts place and using their loaner scanner to complete the task.

Best way to check is by looking at the gas cap. If it does not say "Premium fuel only" you should be safe. Higher octane rated fuel is used for higher compression motors, and I dont belive that your engine (my guess is the 5.4 V8 should be around 9:1 compression) needs the high octane.

good luck on checking the relay.. its made permantely to the fuse box. Meaning ya cant pull it out or replace it. best thing to do is check power at the pump itself.. if ya got power there.. then the relay is working. also get a fuell pressure check off the fuel rail.. should be anywhere from 55-60 psi..