Knock Sensor — Tata Motors Punch

Category: Engine | Severity: medium | Cost: ₹3,000–₹8,000

What is Knock Sensor?

Detects engine knocking or detonation.

How Knock Sensor Works

Sends vibration signals to ECU.

Why is Knock Sensor Important?

Prevents engine damage.

Common Problems

Sensor failure

Symptoms

Knocking noise
Reduced power

Causes of Failure

Heat
Wear

Impact on Car Performance

Reduced engine efficiency.

DIY Fix Guide — Step by Step

Replace sensor

Maintenance Tips

Use proper fuel

Replacement Cost in India

Estimated range: ₹3,000 – ₹8,000

Where to Buy Online

When to Replace Knock Sensor

When knocking persists.