P2247 Fault Code

O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1

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

The P2247 fault code indicates an issue with the O2 sensor reference voltage circuit, specifically for Bank 2 Sensor 1. This sensor plays a crucial role in monitoring the oxygen levels in the exhaust gases, helping the engine control module (ECM) to adjust the air-fuel mixture for optimal performance and emissions. An open circuit in this reference voltage can cause incorrect readings, leading to poor engine performance and increased emissions.

What are the symptoms of the P2247 code?

• Check Engine Light (CEL) illuminated
• Poor fuel efficiency due to incorrect air-fuel mixture
• Rough idling or stalling of the engine
• Increased emissions output
• Failure in emissions testing

What causes the P2247 code?

• Open circuit in the O2 sensor reference voltage wiring
• Faulty O2 sensor for Bank 2 Sensor 1
• Bad connections or corroded terminals in the circuit
• Issues with the ECM or PCM (Powertrain Control Module)
• Short circuit or grounding problems in the wiring harness

How to fix P2247?

• Inspect the wiring and connectors for the Bank 2 Sensor 1 O2 sensor for damage or corrosion
• Repair or replace any damaged wiring or connectors
• Test the O2 sensor for proper operation and replace it if faulty
• Check the ECM for error codes and update or reprogram if necessary
• Clear the fault codes and test drive the vehicle to ensure the issue is resolved