AutoCodes – Toyota – P2255 Toyota

P2255 Toyota Code - A/F Sensor Bank 2 Short Circuit

Quick Answer

The Air-Fuel ratio (A/F) sensor provides output voltage approximately equal to the existing air-fuel ratio. Common causes include Faulty Air/Fuel Sensor Bank 2, Air/Fuel Sensor Bank 2 harness is open or shorted, Air/Fuel Sensor Bank 2 circuit poor electrical connection. 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: P2255 Toyota indicates A/F Sensor Bank 2 Short Circuit.
Common causes: Common causes include Faulty Air/Fuel Sensor Bank 2, Air/Fuel Sensor Bank 2 harness is open or shorted, Air/Fuel Sensor Bank 2 circuit poor electrical connection.
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 4,693

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2255 Toyota 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 P2255 Toyota - A/F Sensor Bank 2 Short Circuit - AutoCodes.com — P2255 Toyota Code - A/F Sensor Bank 2 Short Circuit

What does this mean?

What are the Possible Causes of the DTC P2255 Toyota?

Faulty Air/Fuel Sensor Bank 2
Air/Fuel Sensor Bank 2 harness is open or shorted
Air/Fuel Sensor Bank 2 circuit poor electrical connection
Air/Fuel Sensor Relay
Faulty Engine Control Module (ECM)

How to Fix the DTC P2255 Toyota?

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 P2255 Toyota 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 P2255 Toyota code?

Need more information on how to fix the P2255 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2255 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

P2255 2006 Toyota Camry — Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1
P2255 2007 Toyota Camry — Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1
P2255 2008 Toyota Camry — Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1
P2255 2009 Toyota Camry — Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1
P2255 2010 Toyota Camry — Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1
P2255 2011 Toyota Camry — Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1

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 P2255 Toyota Code

1. What are common symptoms of OBDII code P2255 Toyota (A/F Sensor Bank 2 Short Circuit)?

- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What are possible causes of OBDII code P2255 Toyota?

- Possible causes include a short circuit in the A/F sensor Bank 2, damaged wiring or connectors, or a faulty A/F sensor itself.

3. How can I diagnose OBDII code P2255 Toyota?

- Diagnosing this code involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors for damage, and testing the A/F sensor Bank 2 for proper operation.

4. Can I continue driving with OBDII code P2255 Toyota active?

- It is not recommended to continue driving with this code active, as it can lead to further engine damage and decreased performance. It is best to address the issue promptly.

5. How can I repair OBDII code P2255 Toyota?

- Repairing this code may involve replacing the A/F sensor Bank 2, repairing any damaged wiring or connectors, or resetting the fault code with a scan tool after addressing the underlying issue.

6. Is it possible to clear OBDII code P2255 Toyota without fixing the underlying issue?

- Clearing the code without fixing the underlying issue may temporarily turn off the Check Engine Light, but the code is likely to return until the root cause is addressed.

7. Can a DIY enthusiast fix OBDII code P2255 Toyota at home?

- Depending on your level of automotive knowledge and access to tools, it may be possible to address this code at home by following repair guides and using the appropriate diagnostic equipment.

8. How much does it cost to repair OBDII code P2255 Toyota at a mechanic?

- The cost of repairing this code at a mechanic can vary depending on the specific issue, labor rates, and the cost of parts. It's recommended to obtain quotes from different shops for an accurate estimate.

9. Are there any preventive measures to avoid OBDII code P2255 Toyota in the future?

- Regular maintenance, such as checking the condition of wiring and connectors, and addressing any engine performance issues promptly, can help prevent the occurrence of this code in the future.

10. How long does it typically take to repair OBDII code P2255 Toyota?

- The repair time for this code can vary depending on the complexity of the issue and the availability of parts. In some cases, it can be resolved within a few hours, while more complex issues may take longer to diagnose and repair.