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Engine-Codes – Generic – P2085

P2085 Code - Exhaust Gas Temperature Sensor 2 Circuit Intermittent

Quick Answer

The P2085 code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 circuit in a vehicle's exhaust system. Common causes include Wiring Issues: Damaged or corroded wiring in the EGT Sensor 2 circuit can cause intermittent connection problems, Faulty Sensor: The EGT Sensor itself may be faulty and not providing accurate temperature readings, Engine Control Module Malfunction: A malfunction in the engine control module can also cause intermittent issues with the EGT Sensor 2 circuit. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P2085 indicates Exhaust Gas Temperature Sensor 2 Circuit Intermittent.
Common causes
Common causes include Wiring Issues: Damaged or corroded wiring in the EGT Sensor 2 circuit can cause intermittent connection problems, Faulty Sensor: The EGT Sensor itself may be faulty and not providing accurate temperature readings, Engine Control Module Malfunction: A malfunction in the engine control module can also cause intermittent issues with the EGT Sensor 2 circuit.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P2085 Description

The P2085 code indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 2 circuit in a vehicle's exhaust system. This sensor is responsible for monitoring the temperature of the exhaust gases leaving the engine. It plays a crucial role in ensuring that the engine is running efficiently and that emissions are within acceptable limits. An intermittent issue with this sensor can lead to incorrect temperature readings being sent to the engine control module, resulting in poor engine performance and potentially harmful emissions.

OBDII Code P2085 - Exhaust Gas Temperature Sensor 2 Circuit Intermittent
P2085 Code - Exhaust Gas Temperature Sensor 2 Circuit Intermittent

Common Causes of P2085

  1. Wiring Issues: Damaged or corroded wiring in the EGT Sensor 2 circuit can cause intermittent connection problems.
  2. Faulty Sensor: The EGT Sensor itself may be faulty and not providing accurate temperature readings.
  3. Engine Control Module Malfunction: A malfunction in the engine control module can also cause intermittent issues with the EGT Sensor 2 circuit.
  4. Exhaust System Leaks: Leaks in the exhaust system can lead to temperature fluctuations that affect the sensor's readings.

Symptoms of P2085

  1. Check Engine Light: The most common symptom associated with the P2085 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A faulty EGT Sensor 2 circuit can cause the engine to run inefficiently, leading to decreased fuel efficiency.
  3. Rough Idle: The engine may experience rough idling or stalling when the EGT Sensor 2 circuit is malfunctioning.
  4. Increased Emissions: The vehicle may produce higher emissions than normal due to incorrect temperature readings from the sensor.

How to Fix P2085

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and pinpoint the exact cause of the problem.
  2. Inspect Wiring: Check the wiring harness for any signs of damage or corrosion, and repair or replace as needed.
  3. Replace Sensor: If the EGT Sensor is found to be faulty, replace it with a new sensor that is compatible with the vehicle.
  4. Test System: After repairs are made, test the system to ensure that the EGT Sensor 2 circuit is functioning properly.
  5. Clear Codes: Use the diagnostic scanner to clear the trouble code and reset the check engine light.

Cost to Fix P2085

The cost of repairing a P2085 code can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the parts for this repair can range from $100 to $300, while labor costs can range from $80 to $150 per hour. The total cost of the repair, including parts and labor, may be in the range of $200 to $500. It's important to note that these are rough estimates, and actual costs may vary based on the factors mentioned above.

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Code P2085 Information for Specific Makes

  • P2085 Buick — Exhaust Gas Temperature Sensor 2 Circuit Intermittent
  • P2085 Cadillac — Exhaust Gas Temperature Sensor 2 Circuit Intermittent
  • P2085 Chevrolet — Exhaust Gas Temperature Sensor 2 Circuit Intermittent
  • P2085 Dodge — Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 2
  • P2085 Ford — Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 2
  • P2085 GMC — Exhaust Gas Temperature Sensor 2 Circuit Intermittent
  • P2085 Lincoln — Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 2
  • P2085 Mercury — Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 2
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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