For 1990-2009 cars

### Circuit Description

The powertrain control module (PCM) monitors the resistance of the fuel level sensor, or tank sender, to calculate the amount of fuel in the tank and provides a voltage to the tank sender through a resistor network and a return to PCM ground.

### Conditions for Setting the DTC

DTC P0461 will set if the fuel level changes by less than 2 percent while driving 30 miles.

### Diagnostic Aids

Using a scan tool, monitor the fuel level voltage while rocking the vehicle back and forth. The voltage will fluctuate in a normal operating system.

#### Possible Causes

• | Mechanically stuck fuel sender assembly

• | Damaged or perforated fuel sender float