NOx Sensor — Hyundai Creta
Category: Exhaust | Severity: high | Cost: ₹12,000–₹30,000
What is NOx Sensor?
Measures nitrogen oxide levels in diesel exhaust to ensure emission compliance.
How NOx Sensor Works
Mounted in exhaust system, it monitors NOx gases and helps ECU adjust SCR system.
Why is NOx Sensor Important?
Critical for BS6 compliance and emission reduction.
Common Problems
- Sensor failure
- AdBlue system faults
- Wiring issues
Symptoms
- Check engine light
- Reduced power
- AdBlue warning
Causes of Failure
- Poor fuel quality
- Sensor aging
Impact on Car Performance
Engine may go into limp mode affecting performance.
DIY Fix Guide — Step by Step
- Professional replacement recommended
Maintenance Tips
- Use correct AdBlue
- Regular servicing
Replacement Cost in India
Estimated range: ₹12,000 – ₹30,000
Where to Buy Online
When to Replace NOx Sensor
Only when faulty or warning appears.
Frequently Asked Questions
- Is NOx sensor in petrol cars?
- No, mostly in diesel engines.
- Why is NOx sensor expensive?
- Due to complex emission control technology.
- Can faulty NOx sensor affect mileage?
- Yes, indirectly.