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DTC P2066: Fuel Level Sensor (sub) Circuit Range/Performance <AWD>
 
 
 
 
TECHNICAL DESCRIPTION
  • The fuel level sensor converts the rest of the fuel to a voltage and sends it to the combination meter.
  • The combination meter sends the data regarding the rest of the fuel to the ECM.
  • The ECM checks whether this data is within a specified range.
 
 
DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if change of fuel level sensor output voltage is small when sum of fuel injection is large.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
 
 
Check Condition, Judgment Criterion
  • When the fuel consumption calculated from the operation time of the injector amounts to 10 liters (2.6 gal)*, the diversity of the amount of fuel in tank calculated from the fuel level sensor is less than 2 liters (0.5 gal).
note*: Fuel consumption is equivalent to 20 liters (5.2 gal) under the following conditions.
  • Fuel level sensor (sub) resistance is 13 ohms or less.
or
  • Fuel level sensor (sub) resistance is 70 ohms or more.
  • Fuel level sensor (main) resistance is 13 ohms or less.
noteNot reset after each drive cycle.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • None.
 
 
OBD-II DRIVE CYCLE PATTERN
  • None.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Fuel pump module or fuel level sensor (sub) failed.
  • ECM failed.

 
 
DIAGNOSIS
Required Special Tools:
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: V.C.I.
    • MB991827: USB Cable
    • MB991910: Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code (DTC).
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P0461 set?
Go to Step 2.
Go to Step 4.
 
STEP 2. Check fuel gauge.
Is the fuel gauge functioning?
Go to Step 3.
Refer to GROUP 54A, Combination Meter - Trouble Symptom Chart .
 
STEP 3. Check the trouble symptoms.
  • Check that the fuel gauge operates correctly.
Does the fuel gauge operates correctly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 6.
 
STEP 4. Check the fuel level sensor (sub).
Check to see if the fuel level sensor is normal. Refer to GROUP 54A, Combination Meter - On-vehicle Service - Fuel Gauge Unit Check .
Is the fuel level sensor (sub) normal?
Go to Step 5.
Replace the fuel level sensor (sub). Then go to Step 6.
 
STEP 5. Check the trouble symptoms.
  • Check that the fuel gauge operates correctly.
Does the fuel gauge operates correctly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 6.
 
STEP 6. Check the trouble symptoms.
  • Check that the fuel gauge operates correctly.
Does the fuel gauge operates correctly?
The inspection is complete.
Retry the troubleshooting.