P2086 Fault Code

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

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

The P2086 code refers to an issue with the exhaust gas temperature (EGT) sensor circuit for Bank 2, specifically Sensor 2. This sensor plays a critical role in monitoring the temperature of exhaust gases to ensure optimal engine performance and emission control. When the Engine Control Module (ECM) detects that the temperature readings from this sensor are outside the expected range or not performing as required, it triggers this diagnostic trouble code (DTC).

What are the symptoms of the P2086 code?

When the P2086 code is present, you might notice some of the following symptoms:

• Illumination of the Check Engine Light (CEL).
• Decreased engine performance or reduced fuel economy.
• Increased emissions due to improper fuel management.
• In some cases, the vehicle may enter limp mode to prevent further damage.

What causes the P2086 code?

Several factors may lead to a P2086 code, including:

• A faulty or damaged exhaust gas temperature sensor (Bank 2 Sensor 2).
• Wiring issues, such as shorts, breaks, or corrosion in the sensor's wiring harness.
• Poor electrical connections at the sensor or ECM.
• Exhaust leaks that could affect temperature readings.
• ECM software glitches or corruption.

How to fix P2086?

To resolve a P2086 code, follow these steps:

• Start by scanning the vehicle for any additional trouble codes. Address any other codes present.
• Inspect the exhaust gas temperature sensor (Bank 2 Sensor 2) for any visible damage or wear.
• Check the wiring and connectors leading to the sensor to ensure they are intact and free of corrosion or damage.
• If necessary, replace the faulty EGT sensor.
• Clear the codes and perform a test drive to ensure the issue is resolved.
• If the problem persists, consider updating or reprogramming the ECM as a last resort.