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The problem I have found on all models that experience gauge malfunctions 90% lead back to the ignition switch. The most used part in the car. What I have found is it is totally intermittent. Reason being that the switch has to heat up to malfunction. I couldn't guaranty this is your problem, but I have resolved alot of gauge problems with replacing the ignition switch. Hope this helps you and your mechanic
If your mechanic can't pull code's to see what's going on, find a new mechanic that can. Engine light will flash everytime it pick's up a new code ,then stop flashing and just stay on, have computer diag. done. More then likely your problem will be in your ignition system.Goodluck
I just fixed this problem last weekend in my 2005 Pathfinder. It's not the fuel sending unit itself, it's the fuel level sensor that is attached to the sending unit. I'm not a mechanic, but know a little about fixing vehicles and I did it myself in about 2 hours. The dealer may tell you they need to replace the whole fuel sender, but that is false. The sensor costs $80-90 from the dealer or from Courtesy Nissan in Texas. They will ship it to you. You don't need a "special nissan tool" to remove the sending unit, unless they call a hammer and screwdriver "special". It's a simple locking ring. You could probably have any shop do it for $100 labor if you supply the part. You can find instructions if you search Nissan forums. The Frontier has the same problem (since it's the same truck with a different body) so look in Frontier forums as well. Good luck!
looking in my service manuals it has to be done by the nissan dealer as it uses their scan tool.
if you had tire repaired and put back in same spot then light should have gone off
check your air pressure in all tires if low fill with proper inflation and drive light should go off.
If pressures are good then the sensor in the wheel you had flat in is damaged
This problem maybe solved a couple ways. The first, (and cheapest) is check all your fuses. BMW's sometimes have multiple fuse boxes. In the dashboard behind the clove compartment, under the driver's side or passenger's side dash( near your knees or sides of your calfs), and in the engine compartment under the hood. Fuses are relatively cheap if you do it yourself and are available at nearly all auto parts stores and many WAL*MART'S or TARGET'S.
If you've checked all the fuses with either a fuse checker (about $5 at an auto parts store) or by pulling out and checking each fuse visually (making sure to be very careful not to touch the contacts or not getting shocked by disconnecting the positive battery cable very carefully), another problem may be in your ECU (the car's computer or brains).
If the fuses are fine, I'd take it to a dealer to have them look at the ECU, it is one of those parts that you can't really diagnose yourself with out the right software and computer connections (very expencive tools, around $500-$3,000 each) but many local mechanic shops and all BMW dealers will have these tools.
First check the fuses. If you have trouble finding the fuse boxes, look in the owner's manuals.