Circuit/System Verification

Command the All Indicators test ON and OFF with the scan tool, verify that the low fuel level indicator turns ON and OFF.
- If the low fuel level indicator does not turn ON or OFF as commanded, replace the P16 Instrument Cluster.
Observe the scan tool ECM Fuel Level Sensor parameter. The reading should be 0.5 - 3.5 V and vary with fuel level.
- If the reading does not vary with fuel level, refer to DTC P0461-P0464, P2066, P2067, or P2068 .
Observe the scan tool Instrument Cluster Fuel Level Sensor parameter. The reading should be 0 - 100 percent and vary with fuel level.
- If the reading does not vary with fuel level, refer to DTC P0461-P0464, P2066, P2067, or P2068 .
If the Instrument Cluster and ECM fuel level scan tool parameters vary with fuel level appropriately, replace the P16 Instrument Cluster.