DTC P2201-28: NOx Sensor Circuit Range/Performance Bank 1 Sensor 1 - Signal bias level out of range/zero adjustment failure: Action
WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
- Vehicle Conditions to enable DTC Logging Strategy
- NOx sensor released, the dew point detection function is initiated (after engine start there is a strategy to avoid activation if water is present in the exhaust, the function integrates the warmth quantity seen by the sensor and then releases it, then the sensor is heated and starts measuring)
- Prioritized Checks to Perform
- Refer to the appropriate system wiring diagrams and check the pre selective catalytic reduction NOx sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Check and install a new pre selective catalytic reduction NOx sensor as required
- Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest