hi octavia 2006 mk2 1.9 tdi elegance, the fuel guage has started intermitantly going off after a couple of hours driving quicker on a warm day i have changed fuel sender/pump unit (new) still the same i went to a local dash repairer place as his diagnostics said it was faulty rebuilt it and retested it all fine and next day low and behold doing the same again any one got any ideas as when scanned after dash repair no other faults present he was using vag com to do scann and to electronicly recode dash 

If it is not the sender, then maybe a broken or loose wire connection either at the ends where the connector is or along the wire loom path.

 

Other than that, the clock unit containing the gauges could be faulty but you would have to temporarily change out to another to prove it and it wouldn't be possible to run the car with copying the immobilising settings.

hi thanks for the reply i have allready changed the clocks and recoded new ones old ones read as faulty new read as no faults but still doing it my car is a taxi with 254000 miles on it i visually checked wires at the fuel sender unit  in the tank and wiggled them while car was running n guage not working nothing happened seem ok not sure if the guy who reprogrammed new clocks did same at that end will ave a look when i can but last nite it went off altogether did not come back on after turning ignition off n on again i hit the top of the dashboard twice n it came back on and stayed on all last nite not tried to day not at work till tonite so could be a wire or faulty replacement (second hand) clocks the joys of a old high milage taxi i quess lol