AutoCodes – Acura – P2250 Acura

P2250 Acura Code - O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1

Quick Answer

The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen 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: P2250 Acura indicates O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen 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 1,140

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 P2250 Acura Description

The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

OBDII Code P2250 Acura - O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1 - AutoCodes.com — P2250 Acura Code - O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2250 Acura?

Faulty Front Oxygen Sensor Bank 2
Front Oxygen Sensor Bank 2 harness is open or shorted
Front Oxygen Sensor Bank 2 circuit poor electrical connection

How to Fix the DTC P2250 Acura?

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 P2250 Acura 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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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 P2250 Acura Code

What does the OBDII code P2250 mean on an Acura?

P2250 indicates an issue with the O2 sensor reference voltage circuit for Bank 2 Sensor 1, meaning the sensor is detecting a high voltage outside of normal parameters.

What are the symptoms of code P2250 on an Acura?

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

What causes the P2250 code on an Acura?

The most common causes are a faulty O2 sensor, damaged wiring or connectors, a malfunctioning powertrain control module (PCM), or exhaust leaks.

Which sensor is affected by the P2250 code?

The code specifically refers to the upstream oxygen sensor (Sensor 1) on Bank 2, which monitors the air-fuel mixture before the catalytic converter.

Can I drive my Acura with the P2250 code?

While it may be possible to drive with this code, it is not recommended as it can lead to poor performance, increased emissions, and potential damage to the catalytic converter over time.

How do you diagnose the P2250 code on an Acura?

Diagnosis typically involves checking the O2 sensor voltage readings with a scan tool, inspecting the wiring and connectors for damage, and testing the sensor to confirm functionality.

How can the P2250 code be fixed on an Acura?

Repairs may include replacing the faulty O2 sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, or reprogramming or replacing the PCM if necessary.

How much does it cost to fix the P2250 code on an Acura?

The cost of repairs depends on the issue, with O2 sensor replacement typically ranging between $200 and $400, while wiring or PCM repairs may vary.

What tools are needed to diagnose and fix the P2250 code?

Common tools include an OBDII scan tool, a multimeter for electrical testing, and possibly a wrench or socket set for replacing the O2 sensor.

Can a dirty air filter cause the P2250 code on an Acura?

A dirty air filter is unlikely to cause this specific code, but it can affect overall engine performance and should be checked as part of routine maintenance.