Question about Hyundai Santa Fe
P0464 - Fuel Level Sensor Circuit Intermittent
An intermittent low voltage is sent from the sensor is sent to ECM.
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the ECM or PCM.
It consists of two parts, one is mechanical float and the other side is variable resistor. Fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.
- Engine Light ON (or Service Engine Soon Warning Light)
- Fuel level sersor circuit harness or connectors is open or shorted
- Fuel level sensor may be faulty
Replaced fuel level sensor.
Check it and keep us news.
Posted on May 18, 2011
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Posted on Jan 02, 2017
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When you start your truck. The computer sends a signal to the fuel tank vent valve to close off the fuel tank vapor system... Now, when the vent solenoid is commanded closed, the computer believes that the vapor system is now completely sealed up. The computer now looks at the fuel tank pressure sensor and measures the pressure inside of the tank.
Once the reading is taken, the computer will command the "purge solenoid" to open and pull a vacuum on the fuel tank.
If the computer does not see the pressure sensor reading change, it then assumes that the fuel cap was left off because it sees a fuel vapor leak.
The system will then retest itself after a period of time and if the same results are found, the assumption is that the customer would have already checked/replaced the missing fuel cap and there must be a bigger problem.
CONDITIONS FOR RUNNING THE DTC
Before the powertrain control module (PCM) can report DTC P0455 failed, DTC P0496 must run and pass.
DTCs P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0151, P0152, P0153, P0154, P0155, P0156, P0157, P0158, P0160, P0161, P0220, P0442, P0443, P0449, P0451, P0452, P0453, P0454, P0464, P0496, P0502, P0503, P1111, P1112, P1114, P1115, P1121, P1122, P1125, P2135 are not set.
The engine is running.
The ignition voltage is between 10-18 volts .
The barometric pressure (BARO) is more than 75 kPa .
The fuel level is between 15-85 percent .
The engine coolant temperature (ECT) is between 4-65 degrees C (39-149 degrees F) .
The intake air temperature (IAT) is between 4-75 degrees C (39-167 degrees F) .
The start-up ECT and IAT are within 9 degrees C (16 degrees F) of each other.
DTC P0455 runs once per cold start.
CONDITIONS FOR SETTING THE DTC
The EVAP system is not able to achieve or maintain vacuum during the diagnostic test.
To help locate intermittent leaks, use the J 41413-200 Evaporative Emission System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT High Intensity White Light. Introducing smoke in 15-second intervals will allow less pressure into the EVAP system. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
A temporary blockage in the EVAP canister purge solenoid valve, purge pipe, or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT.
Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
For intermittent conditions, refer to Testing for Intermittent Conditions and Poor Connections.
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