P0333

Knock Sensor 2 Circuit High (Bank 2)

Car Fault Codes Ignition & misfire

Can you still drive? With care, short trips only

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 4 hours

Typical cost SAR 100 to 900

What it means

The signal from knock sensor 2 on bank 2 is higher than the engine computer expects. The cause may be a short to a voltage source, electrical interference in the wiring, or strong mechanical noise on the bank 2 side of the engine.

Symptoms4

Check engine light on.
Reduced performance from retarded ignition timing.
Pinging or mechanical noise from the bank 2 side in some cases.
Higher fuel consumption.

Possible causes6

Sensor 2 signal wire shorted to a powered wire through damaged insulation.
Electrical interference from nearby ignition wires or a damaged wiring shield.
Strong mechanical noise on the bank 2 side, such as a loose part or valve noise.
Real detonation in bank 2 cylinders from low-octane fuel or carbon deposits.
Failed sensor.
Engine computer fault (rare).

How to diagnose5

Listen to the bank 2 side of the engine for mechanical noise or pinging under load.
Inspect the sensor 2 wiring for damaged insulation touching other wires.
Unplug the sensor and watch the reading change to tell a sensor fault from a wiring fault.
Measure sensor resistance and check for unexpected voltage on the signal wire per the manufacturer specification.
If P0328 is also stored, check the parts shared by both sensors and the fuel grade first.

How to fix5

Repair damaged wiring or insulation and route it away from ignition wires.
Use the recommended octane fuel.
Repair the source of mechanical noise if found.
Replace knock sensor 2 if it is proven faulty.
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 wire or fuel grade issue and rises with a new sensor; internal mechanical noise needs a separate estimate.

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

P0328 and P0333 appeared together. What does that mean?

A high signal from both sensors points to a shared cause, such as low-octane fuel, general engine noise or a shared wiring fault, rather than both sensors failing.

Can I drive with this code?

Yes, with care. Avoid hard acceleration and heavy loads, because real knocking in the engine can damage the pistons if it continues.

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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