P2200
HighP2200 — NOx Sensor Circuit Fault, Bank 1
Description
What P2200 Means
Code P2200 points to a fault in the nitrogen oxide (NOx) sensor circuit for bank 1. The NOx sensor is part of the selective catalytic reduction (SCR) system and monitors nitrogen oxide concentration in the exhaust. The SCR system uses the sensor signal to control urea (AdBlue) injection and cut NOx emissions.
The code sets when the engine control unit (DME) sees the NOx sensor signal outside its allowed range or not matching expected behavior. Possible causes include a failed sensor, wiring problems (open circuit, short, poor contact), or a contaminated sensing element.
Symptoms
Symptoms
- Increased fuel consumption.
- Problems with the SCR (selective catalytic reduction) system.
- Check Engine light on the instrument cluster.
Causes and fixes
Diagnosis and Repair
- Check the NOx sensor and its wiring: Inspect the sensor for contamination or damage. Check the electrical connectors and wiring for opens or shorts.
- Diagnose with ISTA/INPA: Read the fault codes and check live sensor parameters. Follow the sensor circuit test instructions.
- Replace the NOx sensor if needed: If the sensor is faulty or contaminated, replace it. Use genuine BMW (OE) parts or quality equivalents.
Possible secondary damage
Secondary Issues
No data