P0147 Fault Code

O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 3)

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

The P0147 code indicates that there is a malfunction in the oxygen sensor heater circuit for Bank 2 Sensor 3. This sensor is responsible for monitoring the oxygen levels in the exhaust gases, helping the engine control module (ECM) optimize fuel efficiency and emissions. A malfunction in this circuit can lead to improper readings, affecting the performance of the vehicle.

What are the symptoms of the P0147 code?

Symptoms associated with the P0147 code may include:

• Check Engine Light illuminated on the dashboard.
• Decreased fuel efficiency.
• Rough engine idle or performance issues.
• Emissions test failure due to improper readings.

What causes the P0147 code?

Common causes of the P0147 code may include:

• Faulty oxygen sensor heater element.
• Open or shorted wiring in the heater circuit.
• Poor connections or corrosion at the sensor connector.
• Blown fuse related to the oxygen sensor heater circuit.
• ECM issues that prevent proper functioning of the sensor.

How to fix P0147?

To resolve the P0147 code, the following steps should be taken:

• Inspect the wiring and connectors for any signs of damage or corrosion.
• Test the oxygen sensor heater element with a multimeter to check for functionality.
• Replace the oxygen sensor if it is found to be faulty.
• Ensure that any blown fuses related to the sensor circuit are replaced.
• Clear the code and perform a test drive to see if it returns.