FixVault
Home › Chevrolet › 2006 › Uplander Base › Repair and Diagnosis › External Pages › Different car › Section 249 (Instrument Panel System Displays And Gauges) › Diagnostic Information and Procedures › DTC P0463 › Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Chevrolet Monte Carlo and 2007 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the fuel level sensor.
  2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit and ground.
    • If greater than 1 ohm, test the low reference circuit for a short to voltage or an open/high resistance. If the circuits tests normal, replace the ECM.
  3. Install a amp fused jumper wire between the signal circuit and the low reference circuit of the fuel level sensor. With the scan tool, observe the Fuel Tank Level Remaining parameter and verify the Fuel Tank Level Remaining parameter is greater than 4 percent.
    • If greater than 4 percent, test the fuel level sensor signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits test normal, replace the ECM.
  4. If all circuits tests normal, test or replace the fuel level sensor.
About FixVault