AutoCodes – Acura – P2247 Acura

P2247 Acura Code - O2 Sensor Reference Voltage Circuit Open 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: P2247 Acura indicates O2 Sensor Reference Voltage Circuit Open 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 12,487

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 P2247 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 P2247 Acura - O2 Sensor Reference Voltage Circuit Open Bank 2 Sensor 1 - AutoCodes.com — P2247 Acura Code - O2 Sensor Reference Voltage Circuit Open Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2247 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 P2247 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 P2247 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 P2247 Acura Code

1. What does the OBDII code P2247 mean on an Acura?

P2247 indicates an "O2 Sensor Reference Voltage Circuit Open" for Bank 2 Sensor 1, meaning the reference voltage signal to the upstream oxygen sensor on Bank 2 is disrupted.

2. What are the symptoms of code P2247 in an Acura?

Symptoms may include poor fuel efficiency, rough idling, lack of engine power, an illuminated check engine light, and possibly failed emissions testing.

3. What causes the P2247 code to appear on an Acura?

Common causes include a damaged oxygen sensor, faulty wiring or connectors in the reference voltage circuit, a blown fuse, or a malfunctioning powertrain control module (PCM).

4. Which sensor is affected by code P2247 on an Acura?

The affected sensor is Bank 2 Sensor 1, which is the upstream oxygen sensor on the side of the engine opposite cylinder 1.

5. Can I drive my Acura with code P2247?

While the car may still run, driving with this code can lead to poor performance, increased emissions, and potential damage to the catalytic converter over time.

6. How do you diagnose the P2247 code on an Acura?

Diagnosis involves checking the oxygen sensor reference voltage with a multimeter, inspecting wiring and connectors for damage or corrosion, and testing the PCM if no other issues are found.

7. How do you fix code P2247 on an Acura?

Repairs may involve replacing the faulty oxygen sensor, repairing damaged wiring or connectors, replacing a blown fuse, or reprogramming or replacing the PCM if necessary.

8. How much does it cost to fix code P2247 on an Acura?

The cost varies depending on the issue, ranging from $150 to $400 for an oxygen sensor replacement or more if wiring or PCM repairs are needed.

9. What happens if the P2247 code is ignored on an Acura?

Ignoring the code can lead to reduced fuel efficiency, increased emissions, and potential long-term damage to the engine or catalytic converter.

10. Can a dirty oxygen sensor trigger code P2247 on an Acura?

A dirty or contaminated oxygen sensor is unlikely to cause this specific code, as P2247 refers to an open circuit in the reference voltage rather than sensor performance.