P2084 Fault Code

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2

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

The P2084 fault code indicates an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit for Bank 1 Sensor 2. This sensor is responsible for monitoring the temperature of the exhaust gases after they have passed through the catalytic converter. Accurate readings are crucial for the engine control module (ECM) to adjust fuel delivery for optimal performance and emissions control. If the sensor detects temperatures that fall outside the expected range, it triggers the fault code.

What are the symptoms of the P2084 code?

Common symptoms associated with the P2084 fault code include:

• Triggering of the Check Engine Light (CEL).
• Decreased engine performance, particularly under load.
• Poor fuel economy due to incorrect fuel mixture adjustments.
• Increased emissions due to improper monitoring of exhaust temperatures.

What causes the P2084 code?

Several factors can lead to the P2084 code being triggered, including:

• A faulty EGT sensor that is providing inaccurate readings.
• Short circuits or open circuits in the wiring harness connected to the sensor.
• Corrosion or damage to the connectors.
• Exhaust system leaks that affect the sensor’s temperature readings.
• A malfunctioning engine control module (ECM) that misinterprets sensor data.

How to fix P2084?

To resolve the P2084 fault code, consider the following steps:

• Inspect the EGT sensor for any signs of damage or corrosion.
• Check the wiring harness for any short circuits or open circuits.
• Test the EGT sensor with a multimeter to confirm its functionality.
• Replace the EGT sensor if it is determined to be faulty.
• Clear the fault codes and conduct a test drive to see if the issue reoccurs. If the code returns, further diagnosis of the ECM may be necessary.