DTC P20F6:00 [MZR-CD 2.2]SM2444394
DTC P20F6:00 [MZR-CD 2.2]

id0102f3167100

DTC P20F6:00

SCR injector valve stuck open
DETECTION CONDITION
• The SCR control unit monitors urea injector control signal voltage while the engine is running. SCR control module detects that urea injector signal voltage exceeds specification under the following monitor conditions the SCR control unit determines that the urea injector is stuck on.
Monitoring condition
• Battery voltage: 11—16 V
• Atmospheric absolute pressure: 90—130 kPa {0.92—1.32 kgf/cm2, 14.0—18.8 psi}
• Urea pressure: 350—650 kPa {3.57—6.62 kgf/cm2, 50.8—94.2 psi}
• Urea injector coil temperature: -15—140 °C {5—284 °F}
• Urea pump control: AdBlue® pressure stability control
Diagnostic support note
• The MIL illuminates if the SCR control unit detects the above malfunction condition in first drive cycle.
• The SCR warning light flashes if the SCR control unit detects the above malfunction condition in first drive cycle.
• PENDING CODE is available if the SCR control unit detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA (mode2) and snapshot data are available.
• The DTC is stored in the SCR control unit memory.
POSSIBLE CAUSE
• Urea injector malfunction (stuck on)
• SCR control unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
• Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
Yes
Perform the repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE2)
• Is DTC P20F6:00 on FREEZE FRAME DATA (mode2)?
Yes
Go to the next step.
No
Go to troubleshooting for DTC on FREEZE FRAME DATA (mode2).
(See DTC TABLE [MZR-CD 2.2].)
4
VERIFY RELATED PENDING CODE OR STORED DTC
• Switch the ignition to off, then ON (Engine off).
• Verify the related PENDING CODE or stored DTCs using the M-MDS.
• Is the DTC P2047:11, P2047:12, P2047:13, P2047:14 or P2047:15 also present?
Yes
Go to the appropriate DTC troubleshooting procedures.
(See DTC TABLE [MZR-CD 2.2].)
No
Go to the next step.
5
INSPECT WHETHER MALFUNCTION IS IN UREA INJECTOR OR ELSEWHERE
• Perform AdBlue® Injection Amount Inspection using the M-MDS. (See SCR SYSTEM INSPECTION [MZR-CD 2.2].)
• Is the AdBlue® injection amount within the specified?
Yes
Go to the next step.
No
Repair or replace malfunctioning part according inspection result, then go to the next step.
6
VERIFY TROUBLESHOOTING OF DTC P20F6:00 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the SCR control unit memory using the M-MDS.
• Drive the vehicle under FREEZE FRAME DATA (Mode 2) condition.
• Retrieve the DTC using the M-MDS.
• Is the PENDING CODE for this DTC present?
Yes
Replace the SCR control unit, then go to the next step.
(See SCR CONTROL UNIT REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
No
DTC troubleshooting completed.