NOx Sensor — Maruti Suzuki Swift
Category: Exhaust | Severity: high | Cost: ₹15,000–₹40,000
What is NOx Sensor?
Measures nitrogen oxide (NOx) emissions in diesel exhaust systems.
How NOx Sensor Works
Continuously monitors NOx levels and sends data to ECU for emission control adjustments.
Why is NOx Sensor Important?
Critical for BS6 compliance and emission reduction.
Common Problems
- Sensor failure
- Incorrect NOx readings
Symptoms
- Check engine light
- Reduced engine power
- High emissions
Causes of Failure
- Sensor contamination
- AdBlue system issues
- High exhaust temperatures
Impact on Car Performance
Engine may enter limp mode and fail emission norms.
DIY Fix Guide — Step by Step
- Scan ECU codes
- Check AdBlue system
- Replace sensor if faulty
Maintenance Tips
- Maintain AdBlue levels
- Regular diagnostics check
Replacement Cost in India
Estimated range: ₹15,000 – ₹40,000
Where to Buy Online
When to Replace NOx Sensor
When emission errors persist or ECU flags failure.