Technical Car Experts Answers everything you need: gauges not working

Sunday, June 17, 2012

2003 Pontiac Grand Prix: Erratic Fuel Gauge?

The Fuel gauge goes crazy and fluctuates up/down.Gauge goes erratic.

In this case first see the fuel in the tank.If the fuel level is low,then get the fuel filled at nearest gas station.

But if the GAS Tank is already full and you notice this frustrating problem then,
This is the same common problem for GM vehicles.Which many other GM car users are also noticing.
As per that it sounds very much like the Fuel Level Sensor is going to be the culprit.
For your car model the fuel level sensor is located inside the fuel tank.
The sensor is mounted to the side of the Fuel Pump Assembly. To replace this sensor,there is an access door located in the trunk, under the spare tire.
Instead of replacing the sensor directly carefully inspect the electrical connector and harness going to the top of the fuel pump assembly for any loose, broken or damaged wires. If the visual inspection checks ok, suspect a faulty Level Sensor.It has to be replaced.
See the help diagram shown below for parts location :-----

Pontiac fuel assembly parts

Please buy branded parts.They are costly but they give accurate performance and last long.Non-branded parts are cheap considered to branded original parts but many a times this local parts dont get detected,and you carry on replacing some other working parts.And at last one problem,gets to multiple issues.

This details will help.
Thanks.

Users Who Viewed This Problem Also Viewed:

Temperature gauge keeps fluctuating up and down close to red?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-keeps-fluctuating-up.html

Temperature gauge on the dash quit working on Pontiac Grand Prix?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-on-dash-quit-working.html

For All types of Car models and brands help
Go to Newly Launched

FREE Car repair guide?
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html

&
Complete Car repair Help FREE?

http://repairhelpcenter.blogspot.in/2012/03/complete-car-repair-help.html

Its probably speed sensor problem,that is located on the transmission.

But instead of directly replacing the speed sensor.Its advisable to to have it scanned first though to verify that's it.

Also another possibility can be back of the dash causing some problems with it,older neon's had that problem,usually a speed sensor wont fix the problem every time.So check the back of the dash for a cracked circuit first,if it doesn't give any trouble codes from having it scanned.This will help.

Also try the reset procedure.

Unplug the battery for 10 minutes.Then reconnect the battery.Turn on the car and see if gauges starts working,while you drive.

But if that is not helping.Then,

You'll have to check the bus voltages while the problem is happening and disconnect modules one at a time to see if the voltage comes back to normal. It could be a problem with a module or wiring, it may be a failed instrument cluster.

Getting it scanned is the best option.

This will help.

Thanks.

See below the related help solutions,to start your troubleshooting :-----