fuel gauge stopped working
Thread Starter
Instructor
Joined: Mar 2012
Posts: 130
Likes: 1
From: Georgia
fuel gauge stopped working
I was crusing up the interstate with a half tank of gas and the needle bottomed out and low fuel light came on. I saw there was a fuel pump fuse (20a) but it looked fine. 
Last edited by Jtirwin27; May 10, 2012 at 08:09 PM. Reason: grammar
Instructor
Joined: Jan 2012
Posts: 137
Likes: 51
fuel gage
hey..... common problem for all c5's. try techron concentrate. that might do the trick. you most likely have a fuel sending problem. expensive to fix (about 800 dollars) its caused from sulpher build up but techron and good gas only and it might be the solution. i actually changed the unit and the problem came back. since then i have used that stuff in every third tank full and it has not happened since. if you search the forum you will find this problem alot.......
Thread Starter
Instructor
Joined: Mar 2012
Posts: 130
Likes: 1
From: Georgia
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Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
For you guys that don't know ... if you clear the trouble-code associated with a dead fuel gauge with the DIC, the gauge function will come back until the code sets again.
Drifting
Joined: Jul 2009
Posts: 1,359
Likes: 263
Sucky thing is I tried techron 3 times (separate fill ups of course, consecutively) when filling up and still got this dang problem and code.
Not sure what else to do. Haven't gone to the dealer cause it's a $240 program upgrade or some such nonsense.
Not sure what else to do. Haven't gone to the dealer cause it's a $240 program upgrade or some such nonsense.
Instructor
Joined: Sep 2011
Posts: 100
Likes: 0
From: Boiling Springs SC
Ironically, I have both in the tank now. I have driven 80 miles thus far and nothing has changed. I am going to delete the code tomorrow and see if anything changes.
Burning Brakes
Joined: Aug 2010
Posts: 1,086
Likes: 0
How can I clear the code? I went to a shop that had OBD-II and they said they cannot clear it because the OBD-II only handles emission-related codes.
Burning Brakes
Joined: Aug 2010
Posts: 1,086
Likes: 0
Advanced
Joined: Oct 2011
Posts: 66
Likes: 0
From: St. Louis Missouri
To delete the code with the key on hold 'option' and press 'fuel' four times the dic will then scroll through all the codes in the car, you can either watch em all or press reset to skip to manual mode. If i remember youll have p1416 hc h is historical c is current. Use 'option' and 'trip' to change sections and 'fuel' and 'gauge' to scroll through all the codes in a section. You can either clear the codes one at a time by viewing them and holding reset' until it beeps, or holding 'reset' while the section is being displayed. This an also be done while the engine is running. If you reset and something is still causing the code condition itll come right back. I got bored in traffic and ran through all the codes i had this morning.