AutoCodes – GMC – P2085 GMC

P2085 GMC Code - Exhaust Gas Temperature Sensor 2 Circuit Intermittent

Quick Answer

The Exhaust Gas Temperature Sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Exhaust leaks, Faulty Exhaust Gas Temperature Sensor (EGTS) 2, Exhaust Gas Temperature Sensor 2 harness is open or shorted. 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 GMC indicates Exhaust Gas Temperature Sensor 2 Circuit Intermittent.
Common causes: Common causes include Exhaust leaks, Faulty Exhaust Gas Temperature Sensor (EGTS) 2, Exhaust Gas Temperature Sensor 2 harness is open or shorted.
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.

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Code Popularity 1,814

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2085 GMC Description

The Exhaust Gas Temperature Sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. The exhaust temperature sensor 1 is the first exhaust temperature sensor on the exhaust system, the following exhaust temperature sensors are counted upward from the engine outlet to the exhaust system end. The Engine Control Module (ECM) supplies 5 V to the exhaust gas temperature signal circuit and supplies a ground to the low reference circuit. The Exhaust Gas Temperature Sensor temperature information is used by the ECM during the exhaust gas particulate filter cleaning process. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the Exhaust Gas Temperature Sensor resistance has changed greater than a calibrated amount in less than 1 s.

OBDII Code P2085 GMC - Exhaust Gas Temperature Sensor 2 Circuit Intermittent - AutoCodes.com — P2085 GMC Code - Exhaust Gas Temperature Sensor 2 Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P2085 GMC?

Exhaust leaks
Faulty Exhaust Gas Temperature Sensor (EGTS) 2
Exhaust Gas Temperature Sensor 2 harness is open or shorted
Exhaust Gas Temperature Sensor 2 circuit poor electrical connection
Excessive particulate matter buildup on sensor
Faulty Engine Control Module (ECM)

How to Fix the DTC P2085 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2085 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2085 GMC code?

Need more information on how to fix the P2085 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2085 GMC code diagnosed by a professional: Find a repair shop in your area

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.

Frequently Asked Questions about P2085 GMC Code

1. What are the common symptoms of OBDII code P2085 in a GMC vehicle?

- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and the illumination of the Check Engine Light.

2. What does the OBDII code P2085 GMC indicate?

- This code indicates an intermittent issue with the exhaust gas temperature sensor 2 circuit in a GMC vehicle.

3. What are the possible causes of OBDII code P2085 in a GMC vehicle?

- Possible causes include a faulty exhaust gas temperature sensor, wiring issues, sensor connector problems, or a problem with the engine control module (ECM).

4. How can I diagnose the cause of OBDII code P2085 in my GMC vehicle?

- Diagnosis typically involves inspecting the exhaust gas temperature sensor and its wiring for any visible damage, as well as using a scan tool to monitor sensor data and check for any inconsistencies.

5. Is it safe to continue driving with OBDII code P2085 present in a GMC vehicle?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the vehicle and potentially affect its performance and fuel efficiency.

6. Can I repair OBDII code P2085 in my GMC vehicle myself?

- Depending on your level of expertise, you may be able to replace the exhaust gas temperature sensor or repair wiring issues yourself. However, it is recommended to seek professional help for accurate diagnosis and repair.

7. How much does it typically cost to repair OBDII code P2085 in a GMC vehicle?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Are there any maintenance tips to prevent OBDII code P2085 from occurring in a GMC vehicle?

- Regularly inspecting and maintaining the exhaust system, including the exhaust gas temperature sensor and its wiring, can help prevent issues that may trigger this code.

9. Can a faulty exhaust gas temperature sensor affect the overall performance of a GMC vehicle?

- Yes, a faulty sensor can impact the vehicle's performance by causing incorrect fuel mixture, affecting emissions, and potentially leading to engine damage if left unresolved.

10. How long does it take to repair OBDII code P2085 in a GMC vehicle?

- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it typically takes a few hours to complete the repair.