P2231 Fault Code

O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 1

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

• The P2231 fault code indicates an issue in the O2 sensor signal circuit, specifically where it is shorted to the heater circuit for Bank 1, Sensor 1.
• This can occur when the wiring or connectors associated with the O2 sensor become damaged, shorted, or corroded.
• The O2 sensor plays a crucial role in the vehicle's fuel management and emissions control systems by monitoring the oxygen levels in the exhaust gases.

What are the symptoms of the P2231 code?

• Check engine light illuminated on the dashboard.
• Possible decrease in engine performance such as rough idling or stalling.
• Increased fuel consumption due to improper air-fuel mixture.
• Possible failure in emissions testing due to incorrect readings from the O2 sensor.

What causes the P2231 code?

• A damaged or frayed wire in the O2 sensor circuit.
• A short circuit in the O2 sensor or its associated wiring.
• Malfunctioning O2 sensor heater circuit, which can lead to improper sensor readings.
• Poor connections at the O2 sensor plug or other connectors in the circuit.

How to fix P2231?

• Inspect the O2 sensor and its wiring for any signs of damage or wear.
• Repair or replace damaged wiring or connectors as necessary.
• Replace the O2 sensor if it's found to be faulty.
• Clear the diagnostic trouble code from the vehicle's computer after repair and test drive to ensure the issue is resolved.