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Posted on Dec 25, 2012
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My gas guage is reading full all the time and my check gauges is on

I just put a new fuel pump last week and i topped off the tank and the guage is now reading full all the time and the check gauges light is on.

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Steve

Steve

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  • Expert 75 Answers
  • Posted on Dec 29, 2012
Steve
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Joined: Nov 23, 2010
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This might be more going on then just a "stuck float".

However to try to free the hung float full the tank (again) and have a with a few people shake the car back and forth, this took place on my own car.

I was able to fill it up again and fix it. Another problem may be the gauge, at times they can become over extended and be trapped, only way to fix it is to help the needle back.

Hope this helps.

3 Related Answers

simidrm45844

  • 159 Answers
  • Posted on Sep 27, 2009

SOURCE: 2000 Jeep Grand cherokee Laredo

sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered

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ZJLimited

ZJ Limited

  • 17989 Answers
  • Posted on Aug 14, 2009

SOURCE: 1993 Jeep Grand Cherokee Fuel Gauge not working

There could be two problems here:
1. That buoy floating tank is not working properly
2. That the electrical system that fails to submit the dashboard.

Review this information:
- ZJ-Secc-8E-Instrument-Cluster-and-Gauges
Page 2 - Fuel Gauges description
Page 4 - Voltimeter/Tachometer/Fuel Gauge/Low Fuel Inoperative
Page 10 - Specifications
- ZJ-Secc-14-Fuel-System
About Fuel Tank components
- ZJ-Secc-8W-Wiring-Diagrams
Fuel Tank and Gauge & Sensor Units Sending (Page 93 and next)

Good luck... and remember rated this help.

digritz

david mcclellan

  • 530 Answers
  • Posted on Sep 08, 2009

SOURCE: Gas Gauge Problems

You will have to get the error code before the engine light goes back off. You can do this by inserting the key into the ignition, then turning the key key to the on position three times with in 5 seconds. Remember this is the on position no the start position. Once you have done this the odometer will show the error codes briefly. They will look like this "P0202, P1225, P1400. Make sure you write them down because they can go pretty quickly. Once you have the codes go to the link listed below. It will give you a brief description of what the codes mean. If you need any thing else just let me know and I'll try to help.
The first link will have jeep specific codes, the second will be codes generic to all manufacturers. Just scroll down until you see the code listings.
Good luck.

http://www.obd-codes.com/trouble_codes/dodge/

http://www.obd-codes.com/trouble_codes/

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