Volvo Engine D11L (Tier 4) Fault Code: P20EE00 PID: PSID 106 FMI: 12 SCR NOx Catalyst Efficiency Below Threshold (Bank 1) – No Sub Type Information

Volvo Engine D11L (Tier 4) Fault Code: P20EE00 PID: PSID 106 FMI: 12 SCR NOx Catalyst Efficiency Below Threshold (Bank 1) – No Sub Type Information

CONTROL UNIT:
Engine ECU

FAILURE EVENT:
Bad SCR catalyst conversion performance detected.

SYMPTOM:
SCR system does not work properly.

CONDITIONS:
1. Engine running
2. Ambient air temperature between -8?C (17.6?F) and 55?C (131?F).
3. Ambient air pressure between 75 kPa (10.9 psi) and 105 kPa (15.2 psi).
4. Engine speed between 1500 rpm and 2000 rpm.
5. Average SCR temperature between 310?C (590?F) and 550?C (1022?F).
6. Engine running with no changes in speed or torque.

INHIBITING THE DTC:
1. P009501 / MID128 PID105 FMI12 / SE2507-12
2. P009511 / MID128 PID105 FMI4 / SE2507-4
3. P009513 / MID128 PID105 FMI5 / SE2507-5
4. P010501 / MID128 PID102 FMI12 / SE2508-12
5. P010512 / MID128 PID102 FMI3 / SE2508-3
6. P010513 / MID128 PID102 FMI5 / SE2508-5
7. P04009C / MID128 PPID35 FMI1 / EF2136-1
8. P207F9A / MID128 PPID351 FMI1 / EF2551-1
9. P220012 / MID128 PPID348 FMI3 / SE2513-3
10. P220013 / MID128 PPID348 FMI5 / SE2513-5
11. P22001C / MID128 PPID348 FMI14 / SE2513-14
12. P220064 / MID128 PPID348 FMI2 / SE2513-2
13. P220093 / MID128 PPID348 FMI13 / SE2513-13
14. P222601 / MID128 PID108 FMI12 / EF2138-12
15. P222612 / MID128 PID108 FMI3 / EF2138-3
16. P222613 / MID128 PID108 FMI5 / EF2138-5
17. P225C00 / MID128 PPID348 FMI15 / SE2513-15
18. P225D00 / MID128 PPID348 FMI11 / SE2513-11
19. P225E67 / MID128 PPID270 FMI15 / SE2533-15
20. P225F00 / MID128 PPID270 FMI7 / SE2533-7
21. P229E12 / MID128 PPID270 FMI3 / SE2533-3
22. P229E13 / MID128 PPID270 FMI5 / SE2533-5
23. P229E1C / MID128 PPID270 FMI14 / SE2533-14
24. P229E64 / MID128 PPID270 FMI2 / SE2533-2
25. P229E93 / MID128 PPID270 FMI13 / SE2533-13
26. P22FB92 / MID128 PPID348 FMI12 / SE2513-12
27. P22FE00 / MID128 PPID270 FMI12 / SE2533-12
28. U029D00 / MID128 PPID348 FMI9 / SE2513-9
29. U029E00 / MID128 PPID270 FMI9 / SE2533-9

POSSIBLE CAUSES:
1. Wrong DEF.
2. Defective component in the DEF pump unit.
3. Problems in the DEF dosing system.
4. Defective DEF dosing injector.
5. Exhaust gas leakage.
6. Defective SCR catalyst.
7. Defective NOx sensor.