P0462

DTC P0462

CIRCUIT DESCRIPTION
The fuel level sensor changes resistance based on fuel level. The instrument panel cluster (IPC) monitors the signal circuit of the fuel level sensor in order to determine fuel level. When the fuel tank is full, the sensor resistance is high and the IPC senses a high signal voltage. When the fuel tank is empty, the sensor resistance is low and the IPC senses a low signal voltage. The IPC sends the fuel level information via the class 2 serial data circuit to the powertrain control module (PCM) for misfire and evaporative emission (EVAP) diagnostics.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0462 Fuel Level Sensor 1 Circuit Low Voltage

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
- The fuel level signal is less than 3.5 percent.
- The above condition is present for greater than 20 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The fuel gage defaults to empty.
- The PCM records the operating conditions at the time the diagnostic fails. The PCM displays the failure information in the Failure Records on the scan tool.

CONDITIONS FOR CLEARING THE DTC
- The DTC becomes history when the conditions for setting the DTC are no longer present.
- The history DTC clears after 40 malfunction free warm-up cycles.
- The PCM receives the clear code command from the scan tool.

DIAGNOSTIC AIDS
Use the Freeze Frame and/or Failure Records data in order to locate an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data may aid in determining the number of miles since the DTC set. The Fail Counter and Pass Counter can also aid in determining the number of ignition cycles that the diagnostic reported a pass and/or fail. Operate the vehicle within the same freeze frame conditions (RPM, engine load, vehicle speed, temperature, etc.). This will isolate when the DTC failed.

TEST DESCRIPTION

Steps 1 - 10:

The number below refers to the step number on the diagnostic table.
3. Tests for the proper operation of the circuit in the high voltage range.