Oxygen Sensor — Volvo XC90
Category: Exhaust | Severity: medium | Cost: ₹5,000–₹20,000
What is Oxygen Sensor?
Measures oxygen levels in exhaust gases to optimize fuel-air mixture.
How Oxygen Sensor Works
Sends data to ECU for adjusting combustion efficiency.
Why is Oxygen Sensor Important?
Improves fuel efficiency and reduces emissions.
Common Problems
- Sensor failure
- Carbon buildup
Symptoms
- Check engine light
- Poor mileage
- Rough idle
Causes of Failure
- Contamination
- Aging
Impact on Car Performance
Reduced fuel efficiency and higher emissions.
DIY Fix Guide — Step by Step
- Scan error codes
- Replace faulty sensor
Maintenance Tips
- Use good quality fuel
- Regular servicing
Replacement Cost in India
Estimated range: ₹5,000 – ₹20,000
Where to Buy Online
When to Replace Oxygen Sensor
When ECU shows sensor fault.