P2000
NOx Trap Efficiency Below Threshold Bank1
AdBlue / SCR / NOx DTC Codes
AdBlue, SCR, urea dosing, and NOx sensor OBD-II diagnostic trouble codes — with technical and legal context for off-road suppression.
About AdBlue / SCR / NOx codes
AdBlue/SCR codes flag urea dosing system failures, NOx sensor faults, and crystallization issues. Common for export markets and off-road use only — EU regulation 2018/858 prohibits SCR removal on road-registered vehicles.
All 56 codes in AdBlue / SCR / NOx
P2001
NOx Trap Efficiency Below Threshold Bank2
P2037
Reductant Inj Air Press Sensor Circ
P2038
Reductant Inj Air Press Sensor Circ Range/Perf
P2039
Reductant Inj Air Press Sensor Circ Low Input
P2040
Reductant Inj Air Press Sensor Circ High Input
P2041
Reductant Inj Air Press Sensor Circ Interm
P2042
Reductant Temp Sensor Circ
P2043
Reductant Temp Sensor Circ Range/Perf
P2044
Reductant Temp Sensor Circ Low Input
P2045
Reductant Temp Sensor Circ High Input
P2046
Reductant Temp Sensor Circ Interm
P2047
Reductant Injector Circ/Open Bank1 Unit 1
P2048
Reductant Injector Circ Low Bank1 Unit 1
P2049
Reductant Injector Circ High Bank1 Unit 1
P2050
Reductant Injector Circ/Open Bank2 Unit 1
P2051
Reductant Injector Circ Low Bank2 Unit 1
P2052
Reductant Injector Circ High Bank2 Unit 1
P2053
Reductant Injector Circ/Open Bank1 Unit 2
P2054
Reductant Injector Circ Low Bank1 Unit 2
P2055
Reductant Injector Circ High Bank1 Unit 2
P2056
Reductant Injector Circ/Open Bank2 Unit 2
P2057
Reductant Injector Circ Low Bank2 Unit 2
P2058
Reductant Injector Circ High Bank2 Unit 2
P2059
Reductant Inj Air Pump Ctrl Circ/Open
P2060
Reductant Inj Air Pump Ctrl Circ Low
P2061
Reductant Inj Air Pump Ctrl Circ High
P2062
Reductant Supply Ctrl Circ/Open
P2063
Reductant Supply Ctrl Circ Low
P2064
Reductant Supply Ctrl Circ High
P2200
NOx Sensor Circ Bank1
P2201
NOx Sensor Circ Range/Perf Bank1
P2202
NOx Sensor Circ Low Input Bank1
P2203
NOx Sensor Circ High Input Bank1
P2204
NOx Sensor Circ Interm Input Bank1
P2205
NOx Sensor Heater Ctrl Circ/Open Bank1
P2206
NOx Sensor Heater Ctrl Circ Low Bank1
P2207
NOx Sensor Heater Ctrl Circ High Bank1
P2208
NOx Sensor Heater Sense Circ Bank1
P2209
NOx Sensor Heater Sense Circ Range/Perf Bank1
P2210
NOx Sensor Heater Sense Circ Low Input Bank1
P2211
NOx Sensor Heater Sense Circ High Input Bank1
P2212
NOx Sensor Heater Sense Circ Interm Bank1
P2213
NOx Sensor Circ Bank2
P2214
NOx Sensor Circ Range/Perf Bank2
P2215
NOx Sensor Circ Low Input Bank2
P2216
NOx Sensor Circ High Input Bank2
P2217
NOx Sensor Circ Interm Input Bank2
P2218
NOx Sensor Heater Ctrl Circ/Open Bank2
P2219
NOx Sensor Heater Ctrl Circ Low Bank2
P2220
NOx Sensor Heater Ctrl Circ High Bank2
P2221
NOx Sensor Heater Sense Circ Bank2
P2222
NOx Sensor Heater Sense Circ Range/Perf Bank2
P2223
NOx Sensor Heater Sense Circ Low Bank2
P2224
NOx Sensor Heater Sense Circ High Bank2
P2225
NOx Sensor Heater Sense Circ Interm Bank2