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P2245 Honda Code - O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1

Quick Answer

The O2 sensor reference voltage circuit low code P2245 in a Honda vehicle indicates a potential issue with the oxygen sensor's reference voltage circuit in Bank 1 Sensor 1. Common causes include Faulty Oxygen Sensor: The most common cause of the P2245 code is a malfunctioning Bank 1 Sensor 1 oxygen sensor, Wiring Issues: Damaged or corroded wiring in the oxygen sensor's reference voltage circuit can lead to low voltage readings, ECM Malfunction: A faulty Engine Control Module (ECM) can also trigger the P2245 code by providing incorrect voltage signals to the oxygen sensor. 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
P2245 Honda indicates O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1.
Common causes
Common causes include Faulty Oxygen Sensor: The most common cause of the P2245 code is a malfunctioning Bank 1 Sensor 1 oxygen sensor, Wiring Issues: Damaged or corroded wiring in the oxygen sensor's reference voltage circuit can lead to low voltage readings, ECM Malfunction: A faulty Engine Control Module (ECM) can also trigger the P2245 code by providing incorrect voltage signals to the oxygen sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2245 Honda Description

The O2 sensor reference voltage circuit low code P2245 in a Honda vehicle indicates a potential issue with the oxygen sensor's reference voltage circuit in Bank 1 Sensor 1. Oxygen sensors play a crucial role in monitoring the air-to-fuel ratio in the engine for optimal combustion efficiency. The reference voltage circuit provides a stable voltage signal to the oxygen sensor to ensure accurate readings.

OBDII Code P2245 Honda - O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1
P2245 Honda Code - O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1

Common Causes of P2245 Honda

  1. Faulty Oxygen Sensor: The most common cause of the P2245 code is a malfunctioning Bank 1 Sensor 1 oxygen sensor.
  2. Wiring Issues: Damaged or corroded wiring in the oxygen sensor's reference voltage circuit can lead to low voltage readings.
  3. ECM Malfunction: A faulty Engine Control Module (ECM) can also trigger the P2245 code by providing incorrect voltage signals to the oxygen sensor.
  4. Exhaust System Leaks: Leaks in the exhaust system can disrupt the oxygen sensor readings, leading to a low voltage circuit code.
  5. Short Circuits: Short circuits in the oxygen sensor circuit can cause voltage irregularities and trigger the P2245 code.

Symptoms of P2245 Honda

  1. Check Engine Light: The most common symptom associated with the P2245 code is the illumination of the Check Engine Light on the dashboard.
  2. Decreased Fuel Efficiency: A faulty oxygen sensor can lead to inaccurate fuel mixture readings, resulting in decreased fuel efficiency.
  3. Rough Idling: The engine may experience rough idling or hesitation when the oxygen sensor readings are inaccurate.
  4. Engine Misfires: In severe cases, the vehicle may experience engine misfires due to incorrect fuel mixture ratios.
  5. Emission Issues: The vehicle may fail emissions tests due to increased emissions caused by inaccurate sensor readings.

How to Fix P2245 Honda

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the OBD-II code and perform a thorough inspection of the oxygen sensor and its wiring.
  2. Replace Oxygen Sensor: If the oxygen sensor is found to be faulty, replace Bank 1 Sensor 1 with a new sensor compatible with the Honda vehicle model.
  3. Repair Wiring: Inspect and repair any damaged or corroded wiring in the oxygen sensor's reference voltage circuit.
  4. Check ECM Function: Verify the functionality of the Engine Control Module (ECM) and address any issues that may be causing incorrect voltage signals.
  5. Clear Codes: After completing the repairs, clear the OBD-II codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2245 Honda

The typical repair costs for addressing the P2245 code in a Honda vehicle can range from $200 to $500, including parts and labor. The cost of the oxygen sensor itself can vary depending on the quality and brand, ranging from $50 to $200. Labor costs at auto repair shops can vary between $80 and $150 per hour, with additional charges for diagnostic time and any necessary repairs. It is advisable to consult with a trusted mechanic or dealership for a more accurate cost estimate based on the specific vehicle make and model.

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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.

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