Oxygen Sensor (O2 Sensor) — Nissan Gravite
Category: Engine | Severity: medium | Cost: ₹3,000–₹12,000
What is Oxygen Sensor (O2 Sensor)?
Measures oxygen levels in exhaust gases to optimize fuel mixture.
How Oxygen Sensor (O2 Sensor) Works
Sends data to ECU to adjust fuel injection.
Why is Oxygen Sensor (O2 Sensor) Important?
Maintains fuel efficiency and emissions.
Common Problems
- Sensor failure
- Contamination
Symptoms
- Poor mileage
- Check engine light
Causes of Failure
- Carbon deposits
- Age
Impact on Car Performance
Incorrect mixture reduces efficiency.
DIY Fix Guide — Step by Step
- Scan ECU
- Inspect sensor
- Replace faulty unit
Maintenance Tips
- Use quality fuel
Replacement Cost in India
Estimated range: ₹3,000 – ₹12,000
Where to Buy Online
When to Replace Oxygen Sensor (O2 Sensor)
Replace when faulty or after 80,000–100,000 km.