AutoCodes – Generic – P2233

P2233 Code - O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3

Quick Answer

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Oxygen (O2) Sensor Bank 1 Sensor 3, Oxygen (O2) Sensor Bank 1 Sensor 3 harness is open or shorted, Oxygen (O2) Sensor Bank 1 Sensor 3 circuit poor electrical connection. 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: P2233 indicates O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3.
Common causes: Common causes include Faulty Oxygen (O2) Sensor Bank 1 Sensor 3, Oxygen (O2) Sensor Bank 1 Sensor 3 harness is open or shorted, Oxygen (O2) Sensor Bank 1 Sensor 3 circuit poor electrical connection.
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 5,597

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P2233 Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

OBDII Code P2233 - O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3 - AutoCodes.com — P2233 Code - O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3

What does this mean?

What are the Possible Causes of the DTC P2233?

Faulty Oxygen (O2) Sensor Bank 1 Sensor 3
Oxygen (O2) Sensor Bank 1 Sensor 3 harness is open or shorted
Oxygen (O2) Sensor Bank 1 Sensor 3 circuit poor electrical connection

How to Fix the DTC P2233?

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 P2233 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

P2233 Dodge — O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3

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.