AutoCodes – Toyota – P2239 2009 Toyota Camry

P2239 2009 Toyota Camry Code - Oxygen A/F Sensor Pumping Current Circuit High Bank 1 Sensor 1

Quick Answer

The Air-Fuel ratio (A/F) sensor provides output voltage approximately equal to the existing air-fuel ratio. Common causes include Faulty EFI Relay, Faulty Air/Fuel Sensor Bank 1, Air/Fuel Sensor Bank 1 harness is open or shorted. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2239 2009 Toyota Camry indicates Oxygen A/F Sensor Pumping Current Circuit High Bank 1 Sensor 1 .
Common causes: Common causes include Faulty EFI Relay, Faulty Air/Fuel Sensor Bank 1, Air/Fuel Sensor Bank 1 harness is open or shorted.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 2,401

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2239 2009 Toyota Camry Description

The Air-Fuel ratio (A/F) sensor provides output voltage approximately equal to the existing air-fuel ratio.
The A/F sensor output voltage is used to provide feedback for the Engine Control Module (ECM) to control the air-fuel ratio.
With the A/F sensor output, the ECM can determine deviation from the stoichiometric air-fuel ratio and control proper injection time. If the A/F sensor is malfunctioning, the ECM is unable to accurately control air-fuel ratio.
The A/F sensor is equipped with a heater which heats the zirconia element. The heater is also controlled by the ECM. When the intake air volume is low (the temperature of the exhaust gas is low), current flows to the heater which heats the sensor to facilitate detection of accurate oxygen concentration.
The A/F sensor is a planar type. Compared to a conventional type, the sensor and heater portions are narrower. Because the heat of the heater is conducted through the alumina to zirconia (of the sensor portion), sensor activation is accelerated.

The code is output when there is an open or short in the A/F sensor circuit, or if A/F sensor output drops. To detect these problems, the voltage of the A/F sensor is monitored when turning the ignition switch to the ON position, and the admittance (admittance is an electrical term that indicates the ease of flow of current) is checked while driving. If the voltage of the A/F sensor is between 0.6 V and 4.5 V, it is considered normal. If the voltage is outside of the specified range, or the admittance is less than the standard value, the ECM will determine that there is a malfunction in the A/F sensor. If the same malfunction is detected in the next driving cycle, the MIL is illuminated and a DTC is set.

OBDII Code P2239 2009 Toyota Camry - Oxygen A/F Sensor Pumping Current Circuit High Bank 1 Sensor 1 - AutoCodes.com — P2239 2009 Toyota Camry Code - Oxygen A/F Sensor Pumping Current Circuit High Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2239 2009 Toyota Camry?

Faulty EFI Relay
Faulty Air/Fuel Sensor Bank 1
Air/Fuel Sensor Bank 1 harness is open or shorted
Air/Fuel Sensor Bank 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2239 2009 Toyota Camry?

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 P2239 2009 Toyota Camry 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.

Need more information about the P2239 2009 Toyota Camry code?

Need more information on how to fix the P2239 2009 Toyota Camry code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P2239 2009 Toyota Camry Code

1. What are the common symptoms of OBDII code P2239 in a 2009 Toyota Camry?

- Common symptoms include poor fuel efficiency, rough idling, engine hesitation, and an illuminated check engine light.

2. What does the OBDII code P2239 "Oxygen A/F Sensor Pumping Current Circuit High Bank 1 Sensor 1" indicate in a 2009 Toyota Camry?

- This code indicates that there is a high voltage condition in the oxygen sensor circuit of Bank 1 Sensor 1 in the vehicle's exhaust system.

3. What are some possible causes of OBDII code P2239 in a 2009 Toyota Camry?

- Potential causes include a faulty oxygen sensor, wiring issues in the sensor circuit, a vacuum leak, exhaust system leaks, or a malfunctioning engine control module (ECM).

4. How can I diagnose the OBDII code P2239 in my 2009 Toyota Camry?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and its wiring for damage, checking for vacuum leaks, and testing the ECM for proper functionality.

5. Can I continue driving my 2009 Toyota Camry with the OBDII code P2239 present?

- It is not recommended to ignore this code, as it can lead to reduced fuel efficiency and potential damage to the catalytic converter over time. It is advisable to address the issue promptly.

6. Is it possible to repair OBDII code P2239 in a 2009 Toyota Camry myself?

- Depending on your level of automotive knowledge and access to tools, you may be able to replace the oxygen sensor or repair wiring issues yourself. However, complex diagnostics and ECM testing may require professional assistance.

7. How much does it typically cost to repair OBDII code P2239 in a 2009 Toyota Camry?

- The cost of repair can vary based on the specific cause of the code, but it generally ranges from $200 to $500, including parts and labor. Costs may be higher if other components need replacement.

8. Will resetting the check engine light resolve OBDII code P2239 in my 2009 Toyota Camry?

- Resetting the check engine light may temporarily turn it off, but the underlying issue causing the code will remain. It is crucial to diagnose and address the root cause of the problem to prevent it from reoccurring.