P2250 Fault Code

O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1

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

The P2250 fault code indicates an issue with the O2 Sensor Reference Voltage Circuit for Bank 2, specifically for Sensor 1. This system monitors the oxygen levels in the exhaust gases to optimize fuel efficiency and reduce emissions. When this fault is triggered, it suggests that the voltage reading from the O2 sensor is higher than expected, which can lead to inaccurate readings and poor engine performance.

What are the symptoms of the P2250 code?

Common symptoms associated with the P2250 code include:

• Poor fuel economy
• Rough idling or stalling
• Increased emissions or failed emissions test
• Check Engine Light illuminated
• Delay in throttle response

What causes the P2250 code?

Several factors can lead to this fault code, including:

• A malfunctioning oxygen sensor
• Short circuits in the wiring or connectors related to the O2 sensor
• Faulty Engine Control Module (ECM)
• Corrosion or damage to the electrical connectors
• Issues with the fuel delivery system that cause lean conditions

How to fix P2250?

To resolve the P2250 error code, the following steps should be taken:

1. Use a diagnostic scanner to confirm the P2250 code and check for additional codes.
2. Inspect the O2 sensor wiring and connectors for damage, corrosion, or loose connections.
3. Test the O2 sensor itself using a multimeter to ensure it is functioning properly.
4. If necessary, replace the faulty O2 sensor.
5. Clear the error codes and perform a test drive to ensure the issue is resolved.