General Information

Engine Control
P2066 Fuel Level Sensor - General Information

Component Location





General Description

ECM monitors the voltage output signals of the Fuel Level Sensor (FLS) (#1) and the Fuel Sub Sender (#2). The combined resistance of the two sensors in series enables the fuel gage to determine fuel tank level. ECM also uses values from both sensors to determine condition of the EVAP system for leak detection. ECM monitors both fuel level sensors for the conditions of being stuck high or low, and differences between voltages of fuel level sensors. ECM will calculate if voltage deviation of fuel level sensors has exceeded a limit value while driving. This would be interpreted by the ECM as a fault.

DTC Description

The ECM checks for a fuel level difference of less than 10% after a 170 km (105.6 miles) increase on the odometer. If the less than a 10% change, a DTC P2066 is set. The Malfunction Indicator Lamp (MIL) turns on and will stay on after 2 consecutive drive cycles.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data








Fig 1) Normal data of Fuel Level at idle (41%)
Fig 2) Abnormal data of Fuel Level when fuel level sensor circuit open or short.