Oxygen Sensor — Toyota Fortuner Legender
Category: Exhaust | Severity: medium | Cost: ₹5,000–₹15,000
What is Oxygen Sensor?
Measures oxygen levels in exhaust gases.
How Oxygen Sensor Works
Sends data to ECU to adjust air-fuel ratio.
Why is Oxygen Sensor Important?
Optimizes fuel efficiency and emissions.
Common Problems
- Sensor failure
- Carbon fouling
Symptoms
- Check engine light
- Poor mileage
- Rough idling
Causes of Failure
- Contamination
- Aging
Impact on Car Performance
Reduced fuel efficiency and higher emissions.
DIY Fix Guide — Step by Step
- Sensor replacement
Maintenance Tips
- Timely replacement
- Use quality fuel
Replacement Cost in India
Estimated range: ₹5,000 – ₹15,000
Where to Buy Online
When to Replace Oxygen Sensor
Every 80,000–100,000 km or when faulty.