Fuel Gauge Inoperable

[djackson]

Greetings to all,

I have a 01 Z28 and I my fuel gauge is inoperable. It is not my sending unit, but a high output of the sort through wiring causing my gauge to read empty. What I would like to know is where should I look to repair this issue? Would it be something with the harness connecting to the pump or something under the dashboard or possibly the gauge itself. I have the p0461 and 463 code from my PCM. Any help and or advise would help.

Thanks.

[m6speed]

Originally Posted by djackson

Greetings to all,

I have a 01 Z28 and I my fuel gauge is inoperable. It is not my sending unit, but a high output of the sort through wiring causing my gauge to read empty. What I would like to know is where should I look to repair this issue? Would it be something with the harness connecting to the pump or something under the dashboard or possibly the gauge itself. I have the p0461 and 463 code from my PCM. Any help and or advise would help.

Thanks.

0461 is fuel level sensor
0463 is fuel level sensor circuit high voltage

could be a bad sensor but those usually read full all the time, Locate the pump electrical connector on the rear of the floor pan under the car (above the LH axle tube). It has purple, gray and black wires going toward the fuel tank. Unplug the connector. With a meter set to ohms, read resistance between the black and purple wires going to the tank.

approximate:

88 ohms = full
60 ohms = 3/4
43 ohms = 1/2
26 ohms = 1/4
1 ohm = empty

The readings should correspond to your gauge. If the reading(s) seem accurate to what you have in the tank, the sender is ok. If they don't, the sender or wiring from that connector to the sender has a problem.
To test back to the gauge, ground the purple wire on the body side of the connector back toward the gauge (key ON). The gauge should read empty. With the connector unplugged and no ground applied, the gauge should read full.
it could also be a bad ground.

[djackson]

Ok thanks. I'll try that and see if it works, but I do know that the sending unit is good because I got a new pump and unit and plugged it up, but it still didn't work. When removing the dashboard instrument cluster, is it mandatory to remove the steering wheel or can you adjust it and maneuver the panel around the wheel?

[m6speed]

you remove the bezel around the cluster that has 2 screws in it, move your steering wheel to the furthest down position, unscrew the cluster and pull it out

[djackson]

Thanks. I was trying to remove the the cluster before then realized it would be easier if I unclipped the clear cover first and move it out then the cluster itself. Thanks for the help.

[sweet-94z28]

Mine not working was caused by a computer issue.