Circuit/System Verification

Without UHS or UDV

1. Ignition ON.
2. Verify the DTC P0461, P0462, P0463, P0464, P2066, P2067, or P2068 are not set
   • If DTC P0461, P0462, P0463, or P0464 are set 

     Refer to Primary Fuel Level Sensor Malfunction in Circuit/System Testing

   • If DTC P2066, P2067, or P2068 are set 

     Refer to Secondary Fuel Level Sensor Malfunction in Circuit/System Testing

   • Go to next step: If DTC P0461, P0462, P0463, P0464, P2066, P2067, or P2068 are not set 
3. If equipped, verify the fuel level gauge needle sweeps when performing the scan tool Instrument Cluster Gauge Sweep control function.
   • If the fuel level gauge does not sweep 

     Replace the P16 Instrument Cluster

   • Go to next step: If the fuel level gauge sweeps 
4. Verify the low fuel level indicator turns ON and OFF when commanding the scan tool All Indicators control function ON and OFF.
   • If the low fuel level indicator does not turn ON and OFF 

     Replace the P16 Instrument Cluster

   • Go to next step: If the low fuel level indicator turns ON and OFF 
5. Verify the ECM scan tool Fuel Level Sensor Right Tank parameter is between 0.5 - 3.5 V and varies with fuel level.
   • If not between 0.5 - 3.5 V or does not vary with fuel level 

     Refer to Primary Fuel Level Sensor Malfunction in Circuit/System Testing

   • Go to next step: If between 0.5 - 3.5 V and varies with fuel level 
6. Verify the ECM scan tool Fuel Level Sensor Left Tank parameter is between 0.5 - 3.5 V and varies with fuel level.
   • If not between 0.5 - 3.5 V or does not vary with fuel level 

     Refer to Secondary Fuel Level Sensor Malfunction in Circuit/System Testing

   • Go to next step: If between 0.5 - 3.5 V and varies with fuel level 
7. All OK.

With UHS or UDV

1. Ignition ON.
2. Verify the ECM scan tool Fuel Level Sensor Right Tank parameter is between 0.5 - 3.5 V and varies with fuel level.
   • If not between 0.5 - 3.5 V or does not vary with fuel level 

     Refer to Primary Fuel Level Sensor Malfunction in Circuit/System Testing

   • Go to next step: If between 0.5 - 3.5 V and varies with fuel level 
3. Verify the ECM scan tool Fuel Level Sensor Left Tank parameter is between 0.5 - 3.5 V and varies with fuel level.
   • If not between 0.5 - 3.5 V or does not vary with fuel level 

     Refer to Secondary Fuel Level Sensor Malfunction in Circuit/System Testing

   • Go to next step: If between 0.5 - 3.5 V and varies with fuel level 
4. All OK.