AutoCodes – Chevrolet – P242C 2018 Chevrolet Silverado

P242C 2018 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 2018 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 413

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 2018 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 2018 Chevrolet Silverado - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage - AutoCodes.com — P242C 2018 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P242C 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P242C 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P242C 2018 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 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P242C in a 2018 Chevrolet Silverado?

The common symptoms of code P242C in a 2018 Chevrolet Silverado include reduced engine performance, decreased fuel efficiency, and possible illumination of the check engine light.

2. What can cause the Exhaust Gas Temperature Sensor 3 Circuit Low Voltage error code P242C in a 2018 Chevrolet Silverado?

The P242C code in a 2018 Chevrolet Silverado is typically caused by a malfunctioning exhaust gas temperature sensor, damaged wiring or connectors related to the sensor, or a faulty Engine Control Module (ECM).

3. How can I diagnose the Exhaust Gas Temperature Sensor 3 Circuit Low Voltage code P242C in my 2018 Chevrolet Silverado?

To diagnose code P242C, you can use an OBDII scanner to retrieve the trouble code and perform a visual inspection of the exhaust gas temperature sensor and its wiring. You may also need to test the sensor's resistance and voltage output.

4. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P242C active?

While it may be possible to drive with the P242C code present, it is recommended to address the issue promptly to prevent potential damage to the engine or emissions system. Reduced performance and fuel efficiency may also persist.

5. What are the repair options for fixing the Exhaust Gas Temperature Sensor 3 Circuit Low Voltage code P242C in a 2018 Chevrolet Silverado?

Repair options for resolving code P242C include replacing the faulty exhaust gas temperature sensor, repairing or replacing damaged wiring or connectors, and resetting the ECM to clear the trouble code.

6. Is it possible to reset the check engine light after repairing OBDII code P242C in a 2018 Chevrolet Silverado?

Yes, once you have fixed the underlying issue causing code P242C, you can reset the check engine light using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

7. How do I prevent OBDII code P242C from recurring in my 2018 Chevrolet Silverado?

To prevent the recurrence of code P242C, it is essential to ensure regular maintenance of the exhaust gas temperature sensor and associated components. Keeping up with scheduled vehicle inspections can also help catch potential issues early.

8. Can a DIY enthusiast repair OBDII code P242C in a 2018 Chevrolet Silverado?

Depending on your automotive repair skills and access to tools, DIY enthusiasts may be able to address code P242C by replacing the exhaust gas temperature sensor or repairing wiring issues. However, if unsure, it is best to seek professional assistance.

9. How long does it typically take to repair OBDII code P242C in a 2018 Chevrolet Silverado?

The repair time for code P242C can vary based on the extent of the issue and the availability of parts. In general, replacing the exhaust gas temperature sensor or repairing wiring connections can be completed within a few hours.

10. Will fixing OBDII code P242C improve the overall performance of my 2018 Chevrolet Silverado?

Yes, resolving code P242C and ensuring proper functioning of the exhaust gas temperature sensor can help improve engine performance, fuel efficiency, and overall drivability of your 2018 Chevrolet Silverado.