Knocking sound from engine under load in Carnival

A knocking sound is heard when accelerating hard.

Issue Details

Severity: medium
Impact: May damage engine over time.
Estimated Repair Cost: ₹3,000 – ₹25,000
Affected Years: 2020-2024
Frequency: Common

Symptoms

Knocking noise

Causes

Low quality fuel
Carbon deposits

Solutions

Use better fuel
Engine cleaning

Prevention Tips

Avoid low-grade fuel