P2210 - NOX SENSOR NOX SENSOR SENSE CIRCUIT LOW BANK 1

Oxides of Nitrogen sensors (NOx) are mainly used in the emission systems of diesel engines. Their function is to detect the levels of Nitrogen Oxide that are expelled by the exhaust, once they are burned in the combustion chamber. Since Nox sensors are exposed to hostile conditions, they are made of ceramic and zirconium.

The Engine Control Module (ECM) calculates the nitric oxide and nitrogen dioxide gases, according to the values provided by the Oxygen (O2) and Oxides of Nitrogen Sensors (Nox). With this, the ECM regulates the levels of nitrogen oxides coming out of the exhaust, preventing damage to the atmosphere.

When the diagnostic code P2210 OBDII is set, it means that the ECM has encountered a problem with the output level of the engine’s bank 1 Nox sensor detection circuit. This is specifically because the reading levels are excessively below the programmed range.

• Check Engine lamp illuminates.
• Engine stalling.
• Engine power is reduced.
• Stalling during acceleration.

The reasons for the P2210 OBD2 error code setting are:

• The catalytic converter may not be functioning properly.
• The Coolant Temperature Sensor (ECT) may be faulty.
• The Manifold Absolute Pressure (MAP) sensor may be faulty.
• A fuel injector could be bad.
• Perhaps there is an Oxygen Sensor in bad condition.
• The Nox Sensor may be defective.

The steps to troubleshoot DTC P2210 OBDII code errors are:

• Consult the Technical Service Bulletins (TSB) that apply to the model and year of your vehicle.
• Check for exhaust leaks. You should repair any damage you detect or if necessary replace the exhaust gaskets that are in bad condition.
• Verify that the temperature of the Catalytic Converter is within the specifications given by the manufacturer. Proceed to diagnose as warranted.
• Check all wires leading to the sensors related to the system. These wires are usually exposed to high exhaust temperatures. Therefore, repair or replace any that show signs of burns or wear.