OBD-II Generic Error Code P2084: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
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Error Code
P2084
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P2084 indicates that the exhaust gas temperature (EGT) sensor on bank 1, sensor 2 is not performing within specifications. This sensor monitors exhaust temperature to protect the catalytic converter and engine. It's a medium-severity issue that can reduce fuel economy and trigger the check engine light.
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Tools You'll Need

How to Fix Error Code P2084

  1. Check for Other Codes and Verify

  2. Inspect the EGT Sensor Wiring and Connector

    Allow the exhaust system to cool completely before touching any components to avoid burns.

  3. Test the EGT Sensor Resistance

  4. Check the EGT Sensor Signal Voltage

    Be careful not to short the probe to ground or other pins.

  5. Replace the EGT Sensor if Faulty

    Use a torque wrench to avoid overtightening, which can damage the exhaust manifold.

  6. Inspect the Exhaust System for Leaks

    Exhaust leaks can be toxic; work in a well-ventilated area.

  7. Clear the Code and Test Drive

Parts You May Need

Exhaust gas temperature sensor (Bank 1, Sensor 2)
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Exhaust gas temperature sensor (Bank 1, Sensor 2)
Check Price on Amazon
Exhaust gas temperature sensor (Bank 1, Sensor 2)
Check Price on Amazon
Exhaust gas temperature sensor (Bank 1, Sensor 2)
Check Price on Amazon
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When to Call a Professional

If you have replaced the sensor and wiring but the code persists, or if you suspect a PCM (powertrain control module) issue, consult a professional mechanic. Diagnosing electrical problems at the PCM level requires advanced tools.

Frequently Asked Questions

What does OBD-II code P2084 mean?
P2084 means the exhaust gas temperature (EGT) sensor on bank 1, sensor 2 has a performance issue. The engine control module (ECM) detected that the sensor signal is not within expected range or response time.
Can I drive with error code P2084?
You can drive short distances, but it may reduce fuel economy and potentially damage the catalytic converter if the exhaust temperature is incorrect. It's best to diagnose and fix the issue promptly.
Where is the EGT sensor for P2084 located?
Bank 1, Sensor 2 refers to the downstream exhaust gas temperature sensor on the cylinder bank containing cylinder #1 (usually the rear bank on V6/V8). It is located after the catalytic converter.
How much does it cost to fix P2084?
The EGT sensor itself costs $50-$150, and labor at a shop can add $100-$200. If you DIY, the cost is just the sensor and any necessary tools.
Will clearing the code fix P2084?
No, clearing the code only turns off the check engine light temporarily. If the underlying problem is not fixed, the code will return.

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