AutoCodes – GMC – P2081 GMC

P2081 GMC Code - Exhaust Gas Temperature Sensor 1 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) 1, Exhaust Gas Temperature Sensor 1 harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2081 GMC indicates Exhaust Gas Temperature Sensor 1 Circuit Intermittent.
Common causes: Common causes include Exhaust leaks, Faulty Exhaust Gas Temperature Sensor (EGTS) 1, Exhaust Gas Temperature Sensor 1 harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,526

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 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 P2081 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 P2081 GMC - Exhaust Gas Temperature Sensor 1 Circuit Intermittent - AutoCodes.com — P2081 GMC Code - Exhaust Gas Temperature Sensor 1 Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P2081 GMC?

Exhaust leaks
Faulty Exhaust Gas Temperature Sensor (EGTS) 1
Exhaust Gas Temperature Sensor 1 harness is open or shorted
Exhaust Gas Temperature Sensor 1 circuit poor electrical connection
Excessive particulate matter buildup on sensor
Faulty Engine Control Module (ECM)

How to Fix the DTC P2081 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 P2081 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.

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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 P2081 GMC Code

1. What are the common symptoms of OBDII code P2081 GMC (Exhaust Gas Temperature Sensor 1 Circuit Intermittent)?

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

2. What are some possible causes of OBDII code P2081 GMC?

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

3. How can I diagnose the cause of OBDII code P2081 GMC?

- Diagnose the code by conducting a visual inspection of the sensor and its wiring, checking for exhaust leaks, using a multimeter to test the sensor's resistance, and scanning the ECM for any related trouble codes.

4. Can I drive my vehicle with OBDII code P2081 GMC active?

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

5. How do I repair OBDII code P2081 GMC?

- Repair options include replacing the exhaust gas temperature sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, and clearing the trouble code with a diagnostic scanner.

6. Is it possible to reset OBDII code P2081 GMC without fixing the underlying issue?

- While you can clear the trouble code with a diagnostic scanner, it will likely return if the underlying issue is not addressed. It is essential to diagnose and repair the root cause of the code.

7. Can a DIY enthusiast fix OBDII code P2081 GMC at home?

- Depending on your level of automotive knowledge and tools available, some DIY enthusiasts may be able to address this code at home by following repair guides and using the necessary diagnostic equipment.

8. How much does it cost to repair OBDII code P2081 GMC at a professional mechanic?

- Repair costs for this code can vary depending on the cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Will OBDII code P2081 GMC cause my vehicle to fail an emissions test?

- Yes, this code can cause your vehicle to fail an emissions test, as it indicates a problem with the exhaust gas temperature sensor, which is crucial for emissions control.

10. How long does it typically take to repair OBDII code P2081 GMC?

- The repair time can vary based on the exact cause of the code and the complexity of the fix. In general, it may take a few hours to a full day to diagnose and repair this issue.