Question about 1997 Cadillac DeVille

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Fuel Level error Used fuel reading Ok

Hi I have a 1997 Deville.Fuel level reads incorrect.Actual fuel used reading Ok?

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You have to replace the fuel level sensor . it might be the solution.

Posted on Jun 02, 2009

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Posted on Jan 02, 2017

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1997 Cadillac Eldorado fuel gauge not reading fuel level correctly


Did you test before replacing ? Do you know how it work's ?

Fuel Level
The body control module (PZM) monitors the fuel level sender input in order to determine the current fuel level. The PZM filters the input and sends a message via the Class 2 serial data line. The IPC receives this message and displays the current fuel level. The fuel level is sent from the PZM to the IPC at changes of 0.5 L (0.02 gal) or on the request of the IPC, with a resolution of 0.04 L (0.01 gal).
• For the digital IPC, when the fuel level is above 18.5 gal, the IPC displays an F. For readings between 18.5-2.5 gal, whole gallon/liter numbers are displayed. When the fuel level reaches 3.0 gal the message FUEL LEVEL LOW is displayed on the driver message center. When the fuel level reaches 2.5 gal, the IPC displays an E. When the fuel level is 1.2 gal or below the IPC displays a flashing E.
• For the analog IPC, when the fuel level is above 18.5 gal, the fuel gauge pointer is on F. When the fuel level is below 2.5 gal the fuel gauge pointer moves to E. When the fuel level is below 3.0 gal the IPC displays a FUEL LEVEL LOW message.
If the updates are not received or a communication error is detected, the IPC performs the following actions:
• For the digital IPC, the fuel gauge is dashed.
• For the analog IPC, the fuel gauge pointer moves to E.

Fuel Gage Inaccurate or Inoperative
Circuit Description
The IPC monitors the fuel level sent by the PZM through the class 2 serial data line. The IPC software controls one of the following two gauge types:
• A digital gauge consisting if a two-digit numeric seven-segment display
• An analog gauge consisting of a needle pointer.
The IPC interpolates and scales the fuel level information that the IPC receives from the PZM.
When you operate the vehicle in diagnostic mode, either in the vehicle diagnostic system or with a scan tool connected, the fuel signal supplied to the IPC is not filtered by the PZM. The unfiltered fuel signal causes the IPC to show real time readings and may be mistaken as an erratic fuel level display.
Diagnostic Aids
Connect a scan tool to the DLC.

Oct 12, 2017 | Cadillac Cars & Trucks

1 Answer

2000 Cadillac Deville DTS 4.6L HO Northstar


Well, I don't think so. The pressure sensor will throw its own code (0450, 0451, 0452, 0453, or 0454). And likewise, the fuel level sender or sensor could also throw its own codes (P0460-P0464).

I'm not sure the level sensor and the pressure sensor are linked together. They are separate on a 2005 buick century, the pressure sensor being at the top of the tank located on the fuel pump module, but Cadillac: anything is possible.

Since you replaced the purge solenoid, there may be a problem in the circuit. The purge should have battery voltage to it with the key on. The ECM will ground the circuit internally when the purge is wanted. One symptom of a purge valve that isn't working or stuck closed can be a whooshing sound when the fuel tank cap is opened, indicating excessive pressure in the tank.
A shop's scan tool could be used to command the purge valve on to check it.

Sep 09, 2014 | 2000 Cadillac DeVille DTS

1 Answer

Fuel level error on 1997 lincoln continental


You did not say what type error you have, but assuming it shows empty it can be a bad float in the fuel tank. When you check the float, you can shake it to see if it contains a liquid. When you test it for floatation, gasoline must be used, not water, because the specific gravity of water is different than gas.

The float should not have a liquid in it, so that would mean the float will sink. Other than that, bad connections could cause low readings.

Dec 17, 2013 | 1997 Lincoln Continental

1 Answer

Fuel gauge reads full when take is empty


Hello, this is normally caused by a bad fuel level sensor. the fuel level sensor is mounted on the side of fuel pump inside the fuel tank. there is a access panel in the floor of the trunk that can be removed to gain access to the fuel pump and level sensor.



Remove the fuel level sensor (5) from the modular fuel sender.



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May 29, 2011 | 1997 Pontiac Grand Prix

1 Answer

Does a 1999 Chevrolet Blazer have a fuel censor?


Hi, The 1999 blazer has a fuel level sensor mounted in the fuel tank. It is mounted to the module that contains the electric fuel pump. The tank must be removed in order to service this module assy. When the level sensor is faulty, it can cause the guage to read erratic, or incorrect. If the computer senses a fault with the sensor, the check engine light can come on, and the fuel guage can drop to empty. A code can set for the fuel level, and this sensor can be replaced seperate. Good luck... Coop

Oct 01, 2010 | 1999 Chevrolet Blazer

1 Answer

Trying to locate electrical junction to test fuel level sensor


Fuel Level Indication System The fuel level indication system is a magnetic gauge system. It consists of a magnetic fuel gauge (9280) mounted in the instrument cluster (10849) and a sending unit located in the fuel tank (9002) with an instrument cluster gauge amplifier (10E849) in series between the two. No instrument voltage regulator is used with this system. Fuel Gauge
The magnetic gauge movement consists of three primary coils, one of which is wound at a 90-degree angle to the other two. The coils form a magnetic field which varies in direction according to the variable resistance of the sender unit which is connected between two of them. A primary magnet, to which a shaft and pointer are attached, rotates to align to this primary field, resulting in pointer position. The bobbin/coil assembly is pressed into a metal housing which has two holes for dial mounting. There is no adjustment, calibration or maintenance required for these gauges. The instrument cluster amplifier is calibrated to the fuel gauge. The instrument cluster amplifier and fuel gauge must be replaced as a system. Instrument Cluster Gauge Amplifier/Check Gauge Module
The instrument cluster gauge amplifier electrically averages fuel sender readings so the fuel gauge displays actual fuel level and not fluctuations due to sloshing in fuel tank. The instrument cluster gauge amplifier is a small printed circuit board which latches into a pocket on the back of the instrument cluster. The electrical connections for ignition, ground, input from fuel sender and output to fuel gauge are made through a spring-type connector on the instrument cluster gauge amplifier to the instrument cluster printed circuit (10K843) on the instrument cluster. There are no provisions for calibration or adjustment of the instrument cluster gauge amplifier.
Fuel Sending Unit
The fuel sending unit consists of a variable screened resistor made up of a ceramic substrate. It is controlled by the action of an attached float in the fuel tank. When the fuel level is low, resistance in the sending unit is low. When the fuel level is high, the resistance in the sending unit is high. As the float moves from empty to full, the resistance will gradually and continuously increase. f9e3b50.gif

Mar 10, 2010 | 1997 Ford Ranger SuperCab

1 Answer

1997 cadillic deville no fuel is getting into injection pump 50lbs pressure.SHNS


hi, the most common issue here will be a dirty or clogged fuel pump and filter as well. I recommend changing the filter and fuel pump. when replacing these vital devices, make sure the wires are connected tightly and the voltage level at the pump is sufficient.

May 15, 2009 | 1997 Cadillac DeVille

1 Answer

Gas gauge reads full all the time


hello, it sounds like it has something to do with your fuel sending unit located inside your gas tank,on the sending unit it has a float arm that reads the fuel level, some times that float arm gets jammed and wont show your actual fuel level,to fix this with your gas tank at least half full use a rubber mallet or any other object that wont damage the tank and with your key in the start position with the car not running but reading your gages hit the gas tank not to hard but hard enough to lodge the float arm loose, if this is unsuccessful then it will probably be a bad fuel sender location sensor located on the actual fuel sender if that's the case you'll need a new fuel sender. good luck and please send me a update or any questions let me know.

Mar 24, 2009 | 1997 Pontiac Bonneville

1 Answer

Fuel Level Gage Reads Incorrect


sending unit in tank is bad need to drop tank and install new.

Jan 01, 2009 | 1997 Volvo 850

1 Answer

Fuel gauge showing empty


open circuit in the fuel level sensor. mounted in tank. as the fuel level in the tank starts to drop the arm will move past the dead spot on the sensor and the gauge will start reading again.i dont recommend diy replacement of the fuel level sender.

Dec 12, 2008 | 1995 Cadillac DeVille

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