P0162 Fault Code

O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)

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

The P0162 code indicates an issue with the O2 sensor circuit specifically for Bank 2 Sensor 3. This sensor plays a crucial role in monitoring the exhaust gases to ensure the engine runs efficiently and adjusts the air-fuel mixture accordingly. A malfunction in this sensor can lead to poor engine performance and increased emissions.

What are the symptoms of the P0162 code?

Symptoms associated with the P0162 code may include:

• Poor fuel economy due to incorrect air-fuel mixture.
• Rough idling or difficulty starting the engine.
• Illuminated Check Engine Light on the dashboard.
• Increased exhaust emissions, potentially causing the vehicle to fail an emissions test.

What causes the P0162 code?

The causes of the P0162 code may include:

• Faulty Bank 2 Sensor 3 O2 sensor.
• Damaged or frayed wiring or connectors in the O2 sensor circuit.
• Exhaust leaks before the sensor, affecting readings.
• Issues with the Engine Control Module (ECM) failing to recognize readings from the O2 sensor.

How to fix P0162?

To resolve the P0162 code, the following steps should be taken:

• Inspect the wiring and connectors associated with Bank 2 Sensor 3 for damage and repair or replace as necessary.
• Test the O2 sensor for functionality and replace it if it is faulty.
• Examine the exhaust system for leaks that may affect sensor readings.
• Clear the fault codes and test drive the vehicle to ensure the issue is resolved and the Check Engine Light does not reappear.