DTC P203A:00 [DOSING CONTROL UNIT (SKYACTIV-D 2.2)]

id0102k1711200

DTC P203A:00

Urea level sensor circuit problem

DETECTION CONDITION

•  When any of the following conditions is met:

―  The dosing control unit detected a remaining AdBlue^® amount of less than 0% (value output by urea level sensor: Less than 15 mm {0.59 in}) 3 times continuously.

―  The dosing control unit detected a remaining AdBlue^® amount exceeding 100% (value output by urea level sensor: Exceeding 400 mm {15.7 in}) 3 times continuously.

MONITORING CONDITIONS

•  Urea pump is activated.

•  Ignition switched ON

•  Battery voltage: 10.9—16 V

Note

•  DTC P1640:00 is also stored in the PCM.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the dosing control unit detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the dosing control unit memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  Urea level sensor/urea temperature sensor/urea tank heater connector or terminals malfunction

•  Dosing control unit connector or terminals malfunction

•  Short to ground in wiring harness between the following terminals:

―  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L

―  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR

•  Short to power supply in wiring harness between urea level sensor/urea temperature sensor/urea tank heater terminal A and dosing control unit terminal AR

•  Open circuit in wiring harness between the following terminals:

―  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L

―  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR

―  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV

•  Urea level sensor malfunction

•  Dosing control unit malfunction

DTC P203A:00	Urea level sensor circuit problem
DETECTION CONDITION	• When any of the following conditions is met: ― The dosing control unit detected a remaining AdBlue^® amount of less than 0% (value output by urea level sensor: Less than 15 mm {0.59 in}) 3 times continuously. ― The dosing control unit detected a remaining AdBlue^® amount exceeding 100% (value output by urea level sensor: Exceeding 400 mm {15.7 in}) 3 times continuously. MONITORING CONDITIONS • Urea pump is activated. • Ignition switched ON • Battery voltage: 10.9—16 V Note • DTC P1640:00 is also stored in the PCM. Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the dosing control unit detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the dosing control unit memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• Urea level sensor/urea temperature sensor/urea tank heater connector or terminals malfunction • Dosing control unit connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L ― Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR • Short to power supply in wiring harness between urea level sensor/urea temperature sensor/urea tank heater terminal A and dosing control unit terminal AR • Open circuit in wiring harness between the following terminals: ― Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L ― Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR ― Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV • Urea level sensor malfunction • Dosing control unit malfunction

Diagnostic Procedure

STEP	INSPECTION	RESULTS	ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the snapshot data on the repair order.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT UREA LEVEL SENSOR/UREA TEMPERATURE SENSOR/UREA TANK HEATER CONNECTOR CONDITION • Switch the ignition off. • Disconnect the urea level sensor/urea temperature sensor/urea tank heater connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
3		No	Go to the next step.
4	INSPECT DOSING CONTROL UNIT CONNECTOR CONDITION • Disconnect the dosing control unit connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
4		No	Go to the next step.
5	INSPECT UREA LEVEL SENSOR CIRCUIT FOR SHORT TO GROUND • Verify that the urea level sensor/urea temperature sensor/urea tank heater and dosing control unit connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Urea level sensor/urea temperature sensor/urea tank heater terminal C ― Urea level sensor/urea temperature sensor/urea tank heater terminal A • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L • Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to Step 9.
5		No	Go to the next step.
6	INSPECT UREA LEVEL SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the urea level sensor/urea temperature sensor/urea tank heater and dosing control unit connectors are disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the dosing control unit detecting an open circuit. • Measure the voltage at the urea level sensor/urea temperature sensor/urea tank heater terminal A (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between urea level sensor/urea temperature sensor/urea tank heater terminal A and dosing control unit terminal AR. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 9.
7	INSPECT UREA LEVEL SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the urea level sensor/urea temperature sensor/urea tank heater and dosing control unit connectors are disconnected. • Switch the ignition off. • Inspect for continuity between the following terminals (wiring harness-side): ― Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L ― Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR ― Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L • Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR • Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 9.
8	INSPECT UREA LEVEL SENSOR • Inspect the urea level sensor. (See UREA LEVEL SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the urea level sensor/urea temperature sensor/urea tank heater, then go to the next step. (See UREA LEVEL SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
8		No	Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the dosing control unit memory using the M-MDS. (See CLEARING DTC [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) • Idle the engine for 10 s. • Retrieve the dosing control unit DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) • Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the dosing control unit. (See DOSING CONTROL UNIT REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to the next step.
9		No	Go to the next step.
10	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)
10		No	DTC troubleshooting completed.