AutoCodes – Buick – P2085 Buick

P2085 Buick 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 Buick 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 342

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

What does this mean?

What are the Possible Causes of the DTC P2085 Buick?

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 Buick?

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 Buick 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 Buick code?

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

Need Help with the Code?

Get the P2085 Buick 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 Buick Code

1. What are the common symptoms of OBDII code P2085 in a Buick related to the Exhaust Gas Temperature Sensor 2 Circuit Intermittent?

The common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P2085 in a Buick?

Possible causes include a faulty exhaust gas temperature sensor, damaged wiring or connectors, issues with the sensor circuit, or a problem with the engine control module.

3. How should I diagnose the OBDII code P2085 in my Buick?

Diagnosing this code involves inspecting the exhaust gas temperature sensor and its circuit, checking for any visible damage or corrosion, and using a multimeter to test the sensor's resistance.

4. Can I drive my Buick with the OBDII code P2085 present?

It is not recommended to drive your Buick with this code present, as it can lead to further damage to the engine and emissions system. It is best to address the issue promptly.

5. How can I repair OBDII code P2085 in my Buick?

Repairing this code may involve replacing the exhaust gas temperature sensor, repairing any damaged wiring or connectors, or resetting the engine control module after resolving the underlying issue.

6. Are there any DIY tips for fixing OBDII code P2085 in a Buick?

While some basic diagnostic steps can be performed by DIY enthusiasts, it is recommended to seek professional help for accurately diagnosing and repairing this code to prevent any further complications.

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

The cost of repairing this code can vary depending on the exact cause of the issue, the parts needed for replacement, and the labor rates of the service provider. It is advisable to obtain quotes from different repair shops.

8. Will resetting the check engine light resolve OBDII code P2085 in my Buick?

Simply resetting the check engine light will not resolve the underlying issue causing the code. It is crucial to identify and address the root cause of the problem to prevent it from recurring.

9. Is OBDII code P2085 a serious issue in a Buick?

While it may not result in immediate engine failure, ignoring this code can lead to poor engine performance, reduced fuel efficiency, and potential damage to the emissions system over time. It is best to address it promptly.

10. Can a mechanic clear the OBDII code P2085 without fixing the underlying problem in my Buick?

Clearing the code without fixing the underlying issue will only temporarily remove the check engine light. The root cause of the problem must be addressed to prevent the code from reappearing.