Hino P203D fault code

Technical description

The DEF tank level sensor is connected via the engine ECU, DCU, and CAN communication, and it sends and receives data.

Description of malfunction

Failure of DEF tank level sensor is received from CAN data.

DTC set condition

DTC Detection Condition:

Starter switch ON.

Judgment Criteria:

Failure of DEF tank level sensor (High failure flag) is received from CAN data.

Reset condition

After having restored to the normal conditions.

Indication, warning or system control regulation when the DTC is set

− MIL: ON.

− DEF level indicator is stopped.

Symptoms on the vehicle when the dtc is set

Symptoms on the Vehicle Due to Malfunction:

DEF level indicator is OFF

Pre-inspection work

Check that the battery voltage is in the normal range.

After-inspection work

− Clear all past DTCs.
− Reset “Use SCR related memory”.

− Check if no DTC is stored after test drive.

Possible causes

DEF tank level sensor failure.

Inspection procedure

Troubleshooting steps

Step 1) Check the DTC detected (Engine) [Diagnostic Tool].

1. Connect the vehicle to the diagnostic tool.
2. Set the starter switch to the “ON” position.
3. Select [Engine] and check if a CAN communication system malfunction U02A2 has been detected.

Has DTC U02A2 been detected?

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