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Car not starting fuel gauge not moving mileage display not on

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Hi
this is because of power supply, basically battery.
follwing reasons may be

1.no charge in the battery
2.terminals lose
3.wire going to the main relay got cut.
4.relay to these stuff been burnt out.
5.fuses blown out

Posted on Jul 09, 2010

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Posted on Jan 02, 2017

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Have my car on 3/4 full want to top it up but fuel gauge still showing 3/4 full


Fuel gauge is inaccurate. Just keep filling tank till it takes no more. And knowing the gas mileage you get on the car and fuel tank capacity, set the odometer and when you calculate that you are getting close to the bottom, get some gas.

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Replace fuel pump and sending unit 1997 cadillac deville. before replacing old unit gauge read low fuel but tank has 4 gal or more. after replacing unit gauges read fill with switch in on protion gauges...


what could be the problem ???? The problem is you tried to fix something you have no clue how it works .... Your best bet , take it to a qualified repair shop. You have no idea of the complexity of these cadillac systems . I know you don't have a $ 5000 dollar factory scan tool or equivalent to diagnose . The sending unit in the fuel tank is a input to the BCM . The BCM sends this info to the instrument cluster over the class 2 serial data network - communication network for the control modules on the vehicle. 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.
Test for any set DTCs if no DTCs are set current. Refer to System Check in Body Control Module (PZM) Diagnosis.

Your best bet , take your vehicle to a qualified repair shop.

Feb 09, 2018 | 1997 Cadillac DeVille

1 Answer

If my 1997 Plymouth Neon needed a fuel filter or a fuel pump what kind of problems would my car have? The gas gauage only works half the time and when it doesnt work my car doesnt run, when put into gear...


Your symptoms sound like a fuel pump, not the filter. The gas gauge is controlled by a sending unit that is mounted on the pump in the tank. If the gauge is sometimes not working, chances are, neither is the pump, which would cause the car not to start. The pump not only provides fuel, but also pressurizes the fuel system for the injectors and throttle body. The fuel filter would cause poor mileage and hesitation when accelerating. A completely blocked filter would cause the car not to run, but your gas gauge would still work since it's reading the level of fuel in the tank, not whether it's coming through the line to the engine.

Feb 15, 2010 | 1997 Plymouth Neon

1 Answer

Intermittent problem speedo/odometer


would change the ECU with the chip from the key from a car in scrapyard ,but before you get carried away try another seperate earth on the back of the speedo printed circuit board ,i wouldnt mind betting this is your problem

Aug 13, 2009 | 2002 Ford SVT Focus

2 Answers

Fuel Gauge spun around in opposite direction. The electronic display still shows the mileage remaining. What could the problem be???


It will take about 30 min to fix. Well that's how long it took me to reapair my 2006 SL. First remove the 3 screws from the shroud around your column they are under your column. Make sure your column is extended and in its lowest position. Second remove the 3 trim pieces on top of the cluster by using a flat blade screwdriver be careful not to damage your dash. Third remove the single screw on top of the cluster and the two that are underneath. Fourth release the tabs that hold the bezel around your cluster. Fifth each lens can then be removed exposing the gauge face and needles. Sixth gently move the needle counter clockwise until it rest on top of the needle stop. Seventh try to remember how it all goes back together haha. No really it is a piece of cake 30 to 40 min versus the 2 hour quote from my local Nissan dealer.

May 19, 2009 | 2006 Nissan Maxima

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