Knock Sensor — Audi Q5
Category: Engine | Severity: medium | Cost: ₹2,000–₹8,000
What is Knock Sensor?
Knock sensor detects engine knocking or detonation.
How Knock Sensor Works
It sends signals to ECU to adjust ignition timing.
Why is Knock Sensor Important?
Prevents engine damage from knocking.
Common Problems
- Sensor failure
Symptoms
- Knocking noise
- Poor performance
Causes of Failure
- Wear
- Heat
Impact on Car Performance
Engine may run inefficiently.
DIY Fix Guide — Step by Step
- Scan ECU
- Check wiring
- Replace sensor
Maintenance Tips
- Use quality fuel
Replacement Cost in India
Estimated range: ₹2,000 – ₹8,000
Where to Buy Online
When to Replace Knock Sensor
When knocking persists or sensor fails.