Oxygen Sensor (O2 Sensor) — Maruti Suzuki Swift
Category: Exhaust | Severity: medium | Cost: ₹2,000–₹8,000
What is Oxygen Sensor (O2 Sensor)?
Measures oxygen levels in exhaust gases to optimize air-fuel mixture.
How Oxygen Sensor (O2 Sensor) Works
Sends real-time oxygen data to ECU to adjust fuel injection.
Why is Oxygen Sensor (O2 Sensor) Important?
Ensures fuel efficiency and reduces emissions.
Common Problems
- Sensor contamination
- Slow response
- Complete failure
Symptoms
- Poor mileage
- Check engine light
- Rough idling
Causes of Failure
- Carbon buildup
- Fuel contamination
- Aging
Impact on Car Performance
Reduced fuel efficiency and higher emissions.
DIY Fix Guide — Step by Step
- Scan error codes
- Clean sensor (if possible)
- Replace if faulty
Maintenance Tips
- Use quality fuel
- Regular servicing
- Avoid oil leaks
Replacement Cost in India
Estimated range: ₹2,000 – ₹8,000
Where to Buy Online
When to Replace Oxygen Sensor (O2 Sensor)
After 80,000–100,000 km or when faulty.