DTC P0462: Fuel Level Sending Unit Volts Too Low

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION .

NOTE: Fuel level sending unit may also be referred to as fuel level sensor. Fuel tank module may also be referred to as fuel pump module. Possible causes for DTC to be set are: defective fuel level sending unit, defective Body Control Module (BCM), or defective connectors or wiring.

Turn ignition on with engine off. Using scan tool, check for DTCs. If GLOBAL GOOD TRIP counter is displayed and equal to zero, go to next step. If GLOBAL GOOD TRIP counter is not displayed and equal to zero, go to step 6 .
Turn ignition off. Disconnect fuel tank module connector. Fuel tank module contains fuel pump along with fuel level sending and is located on top of fuel tank.
Using scan tool, read fuel level sensor voltage on scan tool. If fuel level sensor voltage is 4.5 volts or less, go to next step. If fuel level sensor voltage is more than 4.5 volts, replace fuel level sending unit. Perform TEST VER-2A .
Turn ignition off. Disconnect Body Control Module (BCM) connector "B". See Figure . BCM connector "B" is a Gray or White connector and may also be referred to as connector C2. The BCM is located behind junction block, just to left of brake pedal.
Ensure fuel tank module connector is still disconnected. Using ohmmeter, check resistance between ground and terminal No. 46 (Dark Blue wire) on BCM connector "B". If resistance is 5 ohms or more, replace BCM. Reporgram BCM. See BODY CONTROL MODULE under PROGRAMMING. Perform TEST VER-2A . If resistance is less than 5 ohms, repair short to ground on Dark Blue wire between BCM and fuel level sending unit. Perform TEST VER-2A .
Ensure ignition is on with engine off. Using scan tool, read fuel level sensor voltage while wiggling wiring harness between Body Control Module (BCM) connector "B" and fuel level sending unit. BCM connector "B" is a Gray or White connector and may also be referred to as connector C2. The BCM is located behind junction block, just to left of brake pedal. See Figure . Fuel level sending unit is located on fuel tank module which contains fuel pump and is located on top of fuel tank.
If fuel level sensor voltage does not change while wiggling wiring harness and connectors, go to next step. If fuel level sensor voltage changes while wiggling wiring harness and connectors, repair wiring or connectors as necessary. Perform TEST VER-2A .
Turn ignition off. Inspect Dark Blue wire and connectors between fuel level sending unit and terminal No. 46 (Dark Blue wire) on BCM connector "B". If no problems exist, test is complete. Perform TEST VER-2A . If any problems exist, repair wiring or connectors as necessary. Perform TEST VER-2A .