My fuel gague just stop working. I have check the system with my Super Chip scanner function. It show an error code of 602 then when I tried to reset the gague started to work correctly but this was short lived. In about 10 min.it has stop working again. I get a low fuel light and the onboard milage information does not show any milage information. Any ideas?

 

Sound like the typical sender failure...

You might add you inforamtion to to the signature...

 

Just put a new sending unit on it about 5 or 6 mo. ago. When I try to reser with my Super Chip Scanner function it resets temporarly.

99 cummins, 4 Wheel, 168,000 miles. Super Chip, pyro gague, auto trans. 23-23 mpg!

 

What you are getting is a calibration error from the PCM/ECM. The usual cause, when a fuel sender is involved, is a bad ground for the body. It can also occur if an incorrect fuel sender was used, or if the variable resistor in the new sender has a fault and loads the system with full power (usually happens with a full tank).

Check your grounds. If that does not fix the problem, take your old sender and replace the hinge pin on the float pivot with a chunk of aluminum welding rod. Then put it back in, the problem will go away.