Cadillac DeVille Problem Report

Cadillac DeVille Erratic Fuel Gauge Operation

(128 reports)

It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.

Fuel sensor seems to report accurate from full tank to just under half a tank. Then it starts going up towards full again as the tank further empties. -
Had to have fuel sensor replaced. -
Fuel Sensor reports inaccurate fuel levels. -
my car can be bone dry in fuel, but the dash shows full or half tank. -
Fuel gauge does not work properly shows full most of the time can't afford to have fuel pump to be pulled out of the gas tank -
THIS HAS BEEN A PROBLEM SINCE IT HAD 50k. I JUST FILL Y TANK WHEN I GET CLOSE TO 300 MILES. -
Replaced rheostat in the fuel sending unit. -
guage reads true (I think)when I turn key on but when the car starts the guage will read full and not move till car is turned off-hv not been able to fix or hv fixed-any ideas ? loumenn @yahoo.com -
when is full tank it shows ok, as it go empty it starting to show is full tank, dtc P0463. -
already replaced fuel filter, but she still wants to stall...gonna replace entire pump next...?????? -
fuel indicator is not reliable -
fuel gauge was erratic while car was started or car was in idle or car was at speed. in process of ordering a new fuel pump with sending unit ebay less than 60.00.. -
Noticed the same issue. Bought the car at 87000 on the ticker. Whenever the miles per tank raises, the fuel bar does not go down. Haven't gotten a new fuel pump. Always fill it up all the way and know I get roughly 360 miles per tank. -
show tanks is full always -
Fuel sensor failure, Gas gauge reads correct until down to final 8 or 9 gallons, then stars going back up. When it is at or near "empty", it will read "full". -
I had the same problem, the gauge said I had a full tank of gas and I ended running it dry and burning up the fuel pump. -
1/2 tank till empty registers full -
Fuel and all other lighted gauges are blinking and going wacky. -
Same problem. I read from amount used message to determine when to refuel. -
Fuel gauge fluctuation and grossly inaccurate. Replaced tank sensor corrected problem. -
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