I have a question i have a 2004 range rover hse and the trans fail safe program code pop out and i heard a lil bump like if some one hit me and the rev of the engine just droped i turned off the car.

I presume you replaced the damaged loom and cleared the OBD codes.

2004 RangeRiver HSE ??? Range rover hse Your vehicle does not have a fuel cut off switch . A relay controlled by the engine control module is what turns it on . Your best bet , take it to a qualified repair shop. One that has the proper diagnostic skills an tools .

height sensors may have failed or air bags faulty but this should produce a fail code.

I would have my fuel pressure tested to make sure the fuel pump did not fail

Bring the car in, I just replaced a transmission last month in an 03

The HSE designation refers to a Sport Edition 'Rover, not a higher-priced premium edition.
Changing fuel grades can harm an engine that doesn't have computer controlled valve timing.
Symptoms include a pronounced, fast "knock" (usually when you go from 93 to 87 octane) and using a fuel with a higher octane rating than the vehicle requires (example: 93 versus 87) sends unburned fuel into the emissions system and catalytic converter. This puts stress on the emissions system. For some vehicles, a rotten egg smell or a pop when the fuel burns off in the catalytic converter coming from the tailpipe signals use of higher than needed octane gas.
More info on your problems here, as well as useful links:

http://www.rangerovers.net/newrremedies.htm

HOPE THIS HELPS! Don't forget to rate!

The Range Rover actually has 4 oxygen sensors - 2 in front of the Cat and 2 behind the cat - try to check / replace the other 2

dont f with it

Under the hood there is usually a white container marked engine coolant, it goes in there, but don't confuse it with the windshield washer container.

what is wrong with the car,, that you need to rewire. the wiring for suspention is independant.