Knock Sensor — Hyundai Creta
Category: Electrical | Severity: high | Cost: ₹2,000–₹6,000
What is Knock Sensor?
Detects engine knocking (abnormal combustion) and helps the ECU adjust ignition timing.
How Knock Sensor Works
Uses piezoelectric elements to detect vibrations caused by knocking and sends signals to ECU.
Why is Knock Sensor Important?
Prevents engine damage due to detonation.
Common Problems
- Sensor failure
- False readings
Symptoms
- Engine knocking sound
- Reduced power
- Check engine light
Causes of Failure
- Heat exposure
- Aging
Impact on Car Performance
Can cause engine damage if not addressed.
DIY Fix Guide — Step by Step
- Locate on engine block
- Disconnect wiring
- Replace sensor
Maintenance Tips
- Use quality fuel
- Avoid overheating
Replacement Cost in India
Estimated range: ₹2,000 – ₹6,000
Where to Buy Online
When to Replace Knock Sensor
On failure