Oxygen Sensor (O2 Sensor) — Audi A6
Category: Engine | Severity: medium | Cost: ₹4,000–₹15,000
What is Oxygen Sensor (O2 Sensor)?
Measures oxygen level in exhaust gases.
How Oxygen Sensor (O2 Sensor) Works
Helps ECU adjust fuel mixture for efficiency.
Why is Oxygen Sensor (O2 Sensor) Important?
Critical for emissions and fuel economy.
Common Problems
- Sensor failure
- Carbon buildup
Symptoms
- Check engine light
- Poor mileage
- Rough running
Causes of Failure
- Contamination
- Aging
Impact on Car Performance
Increases emissions and fuel consumption.
DIY Fix Guide — Step by Step
- Scan error codes
- Inspect wiring
- Replace faulty sensor
- Use quality fuel
- Reset ECU
Maintenance Tips
- Use clean fuel
- Regular diagnostics
Replacement Cost in India
Estimated range: ₹4,000 – ₹15,000
Where to Buy Online
When to Replace Oxygen Sensor (O2 Sensor)
Replace when sensor fails or after high mileage.