AutoCodes – Generic – P033E

P033E Code - Knock Sensor 4 Circuit Intermittent Bank 2

Quick Answer

The Knock Sensor (KS) senses engine knocking (also known as detonation or pinging) using a piezoelectric element. Common causes include Faulty Knock Sensor 4 Bank 2, Knock Sensor 4 Bank 2 circuit poor electrical connection, Knock Sensor 4 Bank 2 harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P033E indicates Knock Sensor 4 Circuit Intermittent Bank 2.
Common causes: Common causes include Faulty Knock Sensor 4 Bank 2, Knock Sensor 4 Bank 2 circuit poor electrical connection, Knock Sensor 4 Bank 2 harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,431

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P033E Description

The Knock Sensor (KS) senses engine knocking (also known as detonation or pinging) using a piezoelectric element. The sensor is attached to the cylinder block, cylinder head or intake manifold. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM). The ECM uses this signal to retard the ignition timing and protect the engine from this damaging pre-ignition.

OBDII Code P033E - Knock Sensor 4 Circuit Intermittent Bank 2 - AutoCodes.com — P033E Code - Knock Sensor 4 Circuit Intermittent Bank 2

What does this mean?

What are the Possible Causes of the DTC P033E?

Faulty Knock Sensor 4 Bank 2
Knock Sensor 4 Bank 2 circuit poor electrical connection
Knock Sensor 4 Bank 2 harness is open or shorted
Faulty Engine Control Module (ECM)

How to Fix the DTC P033E?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P033E code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific Makes

P033E Toyota — Knock Sensor 4 Circuit Intermittent Bank 2

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.