P2221
NOx Sensor Heater Sense Circuit Bank 2
P2221 is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Sense Circuit Bank 2. Common causes: nox sensor malfunction, open or short circuit in heating circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Deteriorating fuel economy
- Problems with passing technical inspection (due to increased emissions)
- Possible misfires
Causes
- NOx sensor malfunction
- Open or short circuit in heating circuit
- Poor contact in the sensor connector
- Problems with the engine control unit
- Contact corrosion
How to Fix
- Check the integrity of the sensor heating circuit
- Inspect connectors and contacts for corrosion
- Check the resistance of the sensor heating element
- If necessary, replace the NOx sensor
- Scan the system for other errors
Related codes
Error P2221 by Vehicle Brand
FAQ
What does the P2221 code mean?
P2221 is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Sense Circuit Bank 2
What causes a P2221 error code?
The most common causes of P2221 include: NOx sensor malfunction; Open or short circuit in heating circuit; Poor contact in the sensor connector; Problems with the engine control unit.
How do I fix a P2221 diagnostic trouble code?
To fix P2221: Check the integrity of the sensor heating circuit. Inspect connectors and contacts for corrosion. Check the resistance of the sensor heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2221?
Yes, but get it checked soon
How much does it cost to fix P2221?
The estimated repair cost for P2221 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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