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DTC P0462: Fuel Level Sensor Circuit Low Input
 
 
 
 
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
A short circuit is detected while monitoring the fuel level sensor output.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored 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 Conditions
  • 12V starter battery positive voltage is between 11 and 16.5 volts.
  • More than 2 seconds have passed since the engine starting sequence was completed.
Judgment Criterion
  • Fuel level sensor resistance has continued to be lower than 2 ohms for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • None
 
 
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Fuel level sensor failed.
  • Combination meters assembly failed.
  • Fuel level sensor circuit harness damage or connector damage.
  • ECM failed.

 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), read the combination meter diagnostic trouble code (DTC).
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Turn on the power supply mode of the electric motor switch.
(3) Read the combination meter DTC.
(4) Turn off the power supply mode of the electric motor switch.
Is the combination meter DTC set?
Refer to GROUP 54A, Combination Meter - Diagnosis Trouble Code Chart
Go to Step 2.
 
STEP 2. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0462 set?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 3.
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 .
 
STEP 3. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0462 set?
Retry the troubleshooting.
The inspection is complete.