2000 Firebird Fuel Gauge Issues
Thread Starter
Teching In
Joined: Jan 2018
Posts: 24
Likes: 3
2000 Firebird Fuel Gauge Issues SOLVED - It was the fuel level sensor!
My 2000 Firebird is presenting with a DTC P0463 Fuel Sensor High. When starting the vehicle the fuel gauge shows full, then after a few minutes shows empty and sets the check gauges light. I have a scan tool that has some limited functionality but it can do the needle sweep on the fuel gauge and that seems to work fine. Does that rule out the cluster having a fault?
The fuel guage started to fail a few months back and then the fuel pump followed it. I replaced it with a known good used unit.
I am going to scan again and see if I can get a reading on the fuellevelsensor parameter. The gauge either shows full with no falut or empty with fault - nothing in between. My scan tool is a Vident iLink 400 which is not comprehensive, but it also did not cost 2 grand.
I also have a spare PCM that is already matched to this VIN so I may try that as well.
Any other suggestions?
Thanks!
My 2000 Firebird is presenting with a DTC P0463 Fuel Sensor High. When starting the vehicle the fuel gauge shows full, then after a few minutes shows empty and sets the check gauges light. I have a scan tool that has some limited functionality but it can do the needle sweep on the fuel gauge and that seems to work fine. Does that rule out the cluster having a fault?
The fuel guage started to fail a few months back and then the fuel pump followed it. I replaced it with a known good used unit.
I am going to scan again and see if I can get a reading on the fuellevelsensor parameter. The gauge either shows full with no falut or empty with fault - nothing in between. My scan tool is a Vident iLink 400 which is not comprehensive, but it also did not cost 2 grand.
I also have a spare PCM that is already matched to this VIN so I may try that as well.
Any other suggestions?
Thanks!
Last edited by Paul94Z28; Apr 2, 2022 at 08:13 PM. Reason: Solved!
Launching!
Joined: Jul 2004
Posts: 217
Likes: 40
From: From Massapequa, New York / Now in Southern California
Might be the fuel level sensor or the wiring going to it.
Replacement fuel level sensor:
https://ls1tech.com/forums/showthrea...ferrerid=25107
.
Replacement fuel level sensor:
https://ls1tech.com/forums/showthrea...ferrerid=25107
.
Thread Starter
Teching In
Joined: Jan 2018
Posts: 24
Likes: 3
Thanks for the response 2000 WS6 Formula!
As I mentioned in the OP, I have a spare VIN-matched PCM. In between raindrops today I swapped it in and no change in behavior.
I also have a spare IP cluster now. Does the needle sweep test passing indicate the cluster is good?
This weekend I will get the car in the air and test the wires from the bulkhead to the pump and sender.
As I mentioned in the OP, I have a spare VIN-matched PCM. In between raindrops today I swapped it in and no change in behavior.
I also have a spare IP cluster now. Does the needle sweep test passing indicate the cluster is good?
This weekend I will get the car in the air and test the wires from the bulkhead to the pump and sender.
Thread Starter
Teching In
Joined: Jan 2018
Posts: 24
Likes: 3
I am going to try the cluster first as I need to confirm it is good anyways.
I have a new sending unit on order just in case so when I get it apart I can replace it if needed. I went with the $15 Herko option. If I don't end up needing, it goes in the parts stash.
Thanks for the input!
I have a new sending unit on order just in case so when I get it apart I can replace it if needed. I went with the $15 Herko option. If I don't end up needing, it goes in the parts stash.
Thanks for the input!
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Thread Starter
Teching In
Joined: Jan 2018
Posts: 24
Likes: 3
It ended up being the fuel level sensor as suggested. I replaced the one I had with the Herko GFC13 and it works as expected now.
Thanks for the assist!
Thanks for the assist!
Last edited by Paul94Z28; Apr 2, 2022 at 08:13 PM. Reason: typo
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