AutoCodes – Chevrolet – P242C 2015 Chevrolet Silverado

P242C 2015 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage

Quick Answer

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 3, Exhaust Gas Temperature Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor 3 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: P242C 2015 Chevrolet Silverado indicates Exhaust Gas Temperature Sensor 3 Circuit Low Voltage.
Common causes: Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 3, Exhaust Gas Temperature Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor 3 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.

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Code Popularity 500

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 03, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P242C 2015 Chevrolet Silverado Description

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Exhaust temperature sensor 1 is the first exhaust temperature sensor in 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 ve set when the ECM detects that the exhaust gas temperature sensor is less than 158 Ω for greater than 2 s.

OBDII Code P242C 2015 Chevrolet Silverado - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage - AutoCodes.com — P242C 2015 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P242C 2015 Chevrolet Silverado?

Faulty Exhaust Gas Temperature Sensor (EGTS) 3
Exhaust Gas Temperature Sensor 3 harness is open or shorted
Exhaust Gas Temperature Sensor 3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P242C 2015 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

After starting the engine, the exhaust gas temperature sensor temperature should rise steadily, then stabilize after the engine reaches operating temperature. Exhaust gas temperature sensors may fail intermittently while operating under extreme temperatures. Review the Freeze Frame/Failure Records to verify the failure criteria.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P242C 2015 Chevrolet Silverado 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 P242C 2015 Chevrolet Silverado code?

Need more information on how to fix the P242C 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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Get the P242C 2015 Chevrolet Silverado 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 P242C 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P242C on a 2015 Chevrolet Silverado?

The common symptoms of code P242C include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light on the dashboard.

2. What does the OBDII code P242C "Exhaust Gas Temperature Sensor 3 Circuit Low Voltage" mean in a 2015 Chevrolet Silverado?

Code P242C indicates that there is a low voltage condition detected in the circuit of Exhaust Gas Temperature Sensor 3 in the vehicle's exhaust system.

3. What are the possible causes of OBDII code P242C on a 2015 Chevrolet Silverado?

Common causes of code P242C include a faulty Exhaust Gas Temperature Sensor 3, damaged wiring or connectors in the sensor circuit, or exhaust system leaks.

4. How can I diagnose the OBDII code P242C on a 2015 Chevrolet Silverado?

Diagnosing code P242C involves using an OBDII scanner to retrieve the fault code, inspecting the wiring and connectors of Exhaust Gas Temperature Sensor 3, and testing the sensor's resistance and voltage levels.

5. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P242C?

It is not recommended to drive the vehicle with code P242C as it can lead to further damage to the exhaust system and engine components. Prompt diagnosis and repair are advised.

6. Is it possible to reset the OBDII code P242C on a 2015 Chevrolet Silverado without fixing the issue?

Resetting the code without addressing the underlying problem will only temporarily turn off the check engine light. The code is likely to reappear once the issue persists.

7. How much does it typically cost to repair OBDII code P242C on a 2015 Chevrolet Silverado?

The cost of repairing code P242C can vary depending on the exact cause of the issue. Costs may include replacing the Exhaust Gas Temperature Sensor 3, repairing wiring, or fixing exhaust leaks.

8. Can a DIY enthusiast repair OBDII code P242C on a 2015 Chevrolet Silverado?

While some aspects of diagnosing and repairing code P242C may be within reach of a skilled DIY enthusiast, working on the exhaust system and sensor circuit may require specialized tools and expertise.

9. Will fixing OBDII code P242C improve the performance and fuel efficiency of my 2015 Chevrolet Silverado?

Yes, addressing code P242C and ensuring proper functioning of the Exhaust Gas Temperature Sensor 3 can help restore optimal performance and fuel efficiency of your vehicle.

10. How often does OBDII code P242C occur in a 2015 Chevrolet Silverado?

The occurrence of code P242C can vary depending on the vehicle's usage and maintenance history. Regular inspection and maintenance can help prevent this code from appearing.