DTC P2201 - NOX Sensor Circuit Range/Performance (Bank 1 Sensor 1)

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P2201 - NOX SENSOR CIRCUIT RANGE/PERFORMANCE (BANK 1 SENSOR 1)

Description:	This DTC sets when the actual nitrogen oxides bank 1, sensor 1 (NOx11) sensor signal is less than the expected value for a calibrated amount of time.
Possible Causes:	Restricted air filter Intake air system leak Intake manifold leak Crankcase ventilation system leak EGR valve stuck open Low secondary cooling system coolant level Exhaust system leak Corrosion Incorrect connections Contaminated mass airflow (MAF) sensor Contaminated NOx11 sensor Damaged MAF sensor Damaged fuel rail pressure (FRP) sensor Damaged NOx11 sensor
Diagnostic Aids:	Check for all other DTCs. Diagnose all other DTCs first. The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument panel cluster (IPC) message center.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST RD .