P0330

Knock Sensor 2 Circuit (Bank 2)

Car Fault Codes Ignition & misfire

Can you still drive? Yes, normally

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 4 hours

Typical cost SAR 100 to 900

What it means

This code appears on engines with a second knock sensor for bank 2, the bank that does not contain cylinder 1. The engine computer has found a fault in this sensor's circuit and retards ignition timing as a precaution, reducing power and increasing fuel use.

Symptoms4

Check engine light on.
Weaker acceleration.
Slightly higher fuel consumption.
Pinging under load in some cases.

Possible causes5

Damaged or corroded bank 2 sensor connector or wiring.
Failed knock sensor 2.
Heat-damaged wiring, especially if the sensor sits under the intake manifold.
Loose sensor or incorrect mounting torque.
Engine computer fault (rare).

How to diagnose5

Read the codes; if P0325 appears with P0330, look for a connector or harness shared by both sensors.
Find knock sensor 2 in the service manual and inspect its connector and wiring.
Measure sensor resistance and wiring continuity and compare them with the manufacturer specification.
Confirm the sensor torque.
Compare its signal with the bank 1 sensor on an oscilloscope if available.

How to fix5

Clean the connector and repair damaged wiring.
Retighten the sensor to the correct torque.
Replace knock sensor 2 if it is proven faulty.
Replace the shared harness if it caused codes for both sensors.
Clear the codes, drive under moderate load and confirm the code does not return.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low for a connector or wiring repair and rises with a new sensor, especially if the intake manifold must be removed to reach it.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions

What is bank 2?

On engines with two banks, bank 1 holds cylinder 1 and bank 2 is the opposite bank. That is why this code only appears on engines with two knock sensors.

P0325 and P0330 appeared together. Did both sensors fail?

Both sensors rarely fail at the same time. A shared connector or harness, or the computer's supply, is more likely, so check those first.

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This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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