Engine Control Unit (ECU) — Audi Q5

Category: Engine | Severity: high | Cost: ₹30,000–₹1,50,000

What is Engine Control Unit (ECU)?

The ECU is the brain of the engine that controls fuel injection, ignition timing, and overall performance.

How Engine Control Unit (ECU) Works

It receives data from sensors and adjusts engine parameters in real-time.

Why is Engine Control Unit (ECU) Important?

Ensures optimal performance, efficiency, and emission control.

Common Problems

Software glitches
Electrical failure

Symptoms

Check engine light
Engine misfire
Poor performance

Causes of Failure

Voltage spikes
Water damage

Impact on Car Performance

Severely affects engine operation.

DIY Fix Guide — Step by Step

Scan ECU with OBD tool
Check wiring connections
Reset ECU if required

Maintenance Tips

Avoid water exposure
Use stable battery voltage

Replacement Cost in India

Estimated range: ₹30,000 – ₹1,50,000

Where to Buy Online

When to Replace Engine Control Unit (ECU)

When ECU fails or cannot be repaired.