AutoCodesHyundai – P2250 Hyundai

P2250 Hyundai 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 Hyundai 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 1,417
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2250 Hyundai 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 Hyundai - O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1 - AutoCodes.com
P2250 Hyundai Code - O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1

What are the Possible Causes of the DTC P2250 Hyundai?

  • 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 Hyundai?

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 Hyundai 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 P2250 Hyundai code?

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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 P2250 Hyundai Code

1. What does the OBDII code P2250 mean in a Hyundai?

P2250 indicates an issue with the O2 Sensor Reference Voltage Circuit High for Bank 2 Sensor 1, meaning the sensor isn't receiving the correct voltage signal.

2. What are the symptoms of code P2250 in a Hyundai?

Symptoms include reduced fuel efficiency, rough idling, poor engine performance, or an illuminated check engine light.

3. What causes the P2250 code in a Hyundai?

Common causes include a faulty O2 sensor, damaged wiring or connectors, a malfunctioning ECM, or a short circuit in the reference voltage circuit.

4. Which sensor does P2250 refer to on a Hyundai?

P2250 refers to Bank 2 Sensor 1, which is the upstream oxygen sensor on the side of the engine opposite Cylinder 1.

5. Can I drive my Hyundai with the P2250 code active?

While the car may still drive, it’s not recommended as the engine may run inefficiently, potentially causing further damage over time.

6. How can I diagnose the P2250 code on my Hyundai?

Start by inspecting the wiring and connectors for damage, test the O2 sensor with a multimeter, and check the ECM for proper voltage signals.

7. What is the most common fix for the P2250 code in a Hyundai?

The most common fix is replacing the faulty upstream O2 sensor on Bank 2, though wiring repairs or ECM replacement may also be necessary.

8. How much does it cost to fix the P2250 code on a Hyundai?

Repair costs vary but typically range from $150 to $400 for parts and labor, depending on whether the sensor or wiring needs replacement.

9. Can a dirty air filter cause the P2250 code in a Hyundai?

A dirty air filter is unlikely to cause this specific code, but it’s always good to check and replace it as part of regular maintenance.

10. Will clearing the P2250 code fix the problem in my Hyundai?

Clearing the code may turn off the check engine light temporarily, but it won't fix the underlying issue causing the code to appear.

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