P2246 Fault Code

O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 1

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

The P2246 error code indicates an issue with the O2 (oxygen) sensor reference voltage circuit for Bank 1 Sensor 1. This sensor plays a crucial role in monitoring the oxygen levels in the exhaust gases to optimize the air-fuel mixture for combustion efficiency. When the reference voltage circuit is high, it signals that the voltage provided to the sensor is higher than expected, leading to potentially erroneous readings.

What are the symptoms of the P2246 code?

• Check engine light (CEL) illuminated on the dashboard.
• Poor engine performance due to incorrect air-fuel mixture.
• Decreased fuel efficiency as the engine struggles to maintain optimal conditions.
• Increased emissions due to improper combustion.

What causes the P2246 code?

• Poor electrical connections or damaged wiring in the O2 sensor circuit.
• Faulty O2 sensor that is sending a high voltage signal.
• Short circuits in the reference voltage wiring.
• Malfunctioning engine control module (ECM) or powertrain control module (PCM).

How to fix P2246?

• Inspect the wiring and connectors related to the O2 sensor for any signs of damage, corrosion, or disconnection.
• Use a multimeter to check the voltage output of the O2 sensor and compare it to specifications.
• Replace the O2 sensor if it is confirmed to be faulty.
• Clear the error codes with a scanner and test drive the vehicle to see if the code reappears.