AutoCodes – GMC – P142A GMC

P142A GMC Code - EGR Temperature Sensor 2 Intake Air Temperature 2 Not Plausible

Quick Answer

The Exhaust Gas Recirculation (EGR) Temperature Sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 circuit poor electrical connection. 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: P142A GMC indicates EGR Temperature Sensor 2 Intake Air Temperature 2 Not Plausible.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 496

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 25, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P142A GMC Description

The Exhaust Gas Recirculation (EGR) Temperature Sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. The Engine Control Module (ECM) supplies 5 volts to the EGR temperature sensor signal circuit and a ground for the low reference circuit. When the EGR temperature sensor is cold, the sensor resistance is high. When the EGR temperature increases, the sensor resistance decreases. With high sensor resistance, the ECM detects a higher voltage on the EGR temperature signal circuit. With lower sensor resistance, the ECM detects a lower voltage on the EGR temperature signal circuit.
The Diagnostic Trouble Code (DTC) will be set if the ECM detects that the EGR cooler temperature sensor 1 or 2 is greater than 20°C (36°F) different from Intake Air Temperature (IAT) sensor 2.

OBDII Code P142A GMC - EGR Temperature Sensor 2 Intake Air Temperature 2 Not Plausible - AutoCodes.com — P142A GMC Code - EGR Temperature Sensor 2 Intake Air Temperature 2 Not Plausible

What does this mean?

What are the Possible Causes of the DTC P142A GMC?

Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2
Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted
Exhaust Gas Recirculation Temperature Sensor 2 circuit poor electrical connection

How to Fix the DTC P142A 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 P142A 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 P142A GMC code?

Need more information on how to fix the P142A GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P142A 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 P142A GMC Code

1. What are the common symptoms of OBDII code P142A GMC?

The common symptoms of code P142A GMC include rough idling, reduced engine performance, and an illuminated check engine light.

2. What does the OBDII code P142A GMC indicate?

OBDII code P142A GMC indicates a problem with the EGR Temperature Sensor 2 Intake Air Temperature 2 not being plausible.

3. What are the possible causes of OBDII code P142A GMC?

Possible causes of code P142A GMC include a faulty EGR Temperature Sensor 2, intake air temperature sensor issues, wiring problems, or a malfunctioning EGR system.

4. How can I diagnose the issue related to code P142A GMC?

Diagnosing the issue related to code P142A GMC involves checking the EGR Temperature Sensor 2, intake air temperature sensor, wiring connections, and the EGR system for any signs of damage or malfunction.

5. Can I continue driving my vehicle with OBDII code P142A GMC?

It is not recommended to continue driving your vehicle with code P142A GMC as it can lead to further engine damage and reduced fuel efficiency.

6. How can I repair OBDII code P142A GMC?

Repairing code P142A GMC may involve replacing the faulty EGR Temperature Sensor 2, addressing intake air temperature sensor issues, fixing wiring problems, or repairing/replacing components in the EGR system.

7. Are there any DIY tips for fixing OBDII code P142A GMC?

DIY tips for fixing code P142A GMC include checking and cleaning the EGR system components, inspecting wiring connections for any damage, and ensuring proper sensor functionality.

8. Can a mechanic easily fix OBDII code P142A GMC?

A mechanic with experience in diagnosing and repairing engine-related issues should be able to fix code P142A GMC efficiently by pinpointing the root cause and making necessary repairs or replacements.

9. How important is it to address OBDII code P142A GMC promptly?

It is important to address code P142A GMC promptly to prevent potential engine damage, ensure optimal vehicle performance, and avoid further complications down the road.

10. Is resetting the check engine light after fixing OBDII code P142A GMC necessary?

After fixing code P142A GMC, it is advisable to reset the check engine light using an OBDII scanner to clear the error code and ensure that the issue has been successfully resolved.