AutoCodes – Toyota – P2255 2010 Toyota Camry

P2255 2010 Toyota Camry Code - Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 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 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 2010 Toyota Camry indicates Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1.
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 1,786

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 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2255 2010 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 P2255 2010 Toyota Camry - Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1 - AutoCodes.com — P2255 2010 Toyota Camry Code - Oxygen A/F Sensor Reference Ground Circuit Low Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2255 2010 Toyota Camry?

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 2010 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 P2255 2010 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 P2255 2010 Toyota Camry code?

Need more information on how to fix the P2255 2010 Toyota Camry code? Get Access to Factory Service Manuals

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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 P2255 2010 Toyota Camry Code

What does the OBDII code P2255 mean on a 2010 Toyota Camry?

P2255 indicates a problem with the Oxygen A/F Sensor Reference Ground Circuit being low in Bank 2 Sensor 1. This means the engine control module (ECM) detects an issue with the reference ground signal for the sensor.

What are the symptoms of code P2255 on a 2010 Toyota Camry?

Common symptoms include poor fuel economy, rough idling, reduced engine performance, potential stalling, and an illuminated check engine light.

What causes code P2255 in a 2010 Toyota Camry?

Possible causes include a faulty air-fuel ratio (A/F) sensor, damaged or corroded wiring or connectors in the sensor circuit, a blown fuse, or a malfunctioning ECM.

Which sensor is affected by code P2255?

The affected sensor is Bank 2 Sensor 1, which is the upstream air-fuel ratio sensor on the side of the engine opposite cylinder 1.

How can I diagnose the P2255 code on my 2010 Toyota Camry?

Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to check the reference ground circuit continuity and test the A/F sensor for proper operation. If needed, scan the ECM for further diagnostics.

Can a bad air-fuel ratio sensor cause the P2255 code?

Yes, a malfunctioning air-fuel ratio (A/F) sensor is one of the most common causes of this code.

Is it safe to drive with code P2255 on a 2010 Toyota Camry?

Driving with this code is not recommended, as it can cause poor engine performance, increased emissions, and potential damage to the catalytic converter if left unresolved.

How do I fix the P2255 code on my 2010 Toyota Camry?

Repairs may include replacing the Bank 2 Sensor 1 A/F sensor, repairing damaged wiring or connectors, replacing a blown fuse, or reprogramming/repairing the ECM.

How much does it cost to fix the P2255 code on a 2010 Toyota Camry?

Repair costs can vary, but replacing an A/F sensor typically ranges from $200 to $400, including parts and labor. Additional costs may apply if wiring or ECM repairs are needed.

Can a weak battery cause the P2255 code?

A weak or failing battery is unlikely to directly cause this code, but electrical issues such as low voltage could potentially affect the sensor circuit and should be checked.