P2245 Fault Code

O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2245 error code indicates an issue with the O2 sensor reference voltage circuit for Bank 1 Sensor 1 of the engine. This sensor is crucial for monitoring oxygen levels in the exhaust gases, aiding in proper fuel mixture and emission control. When this circuit is low, it may suggest a malfunctioning sensor or wiring problem.

• The O2 sensor generates a voltage signal that indicates the level of oxygen in the exhaust.
• Bank 1 refers to the side of the engine with the cylinder closest to the radiator.
• Sensor 1 is the primary O2 sensor located before the catalytic converter.

What are the symptoms of the P2245 code?

Drivers may notice several symptoms when encountering a P2245 code:

• The check engine light will illuminate, indicating a fault in the emission system.
• Decreased fuel efficiency due to improper fuel mixture.
• Rough idling or stalling due to engine performance issues.
• Potential increase in harmful emissions as the vehicle struggles to compensate for the faulty sensor.

What causes the P2245 code?

The causes of the P2245 error code can vary, but common reasons include:

• A defective O2 sensor.
• Damaged or corroded wiring in the O2 sensor circuit.
• A poor electrical connection to the O2 sensor.
• Issues in the engine control module (ECM) affecting the signal processing.

How to fix P2245?

To resolve the P2245 error code, the following steps can be taken:

• Inspect the O2 sensor and its wiring for any visible damage or corrosion.
• Test the O2 sensor using a multimeter to ensure it is functioning within specifications.
• Replace the O2 sensor if it is confirmed faulty.
• Repair any damaged wiring or connectors in the O2 sensor circuit.
• Clear the code and perform a test drive to ensure the issue does not return.