AutoCodes – Chevrolet – P242D Chevrolet

P242D Chevrolet Code - Exhaust Gas Temperature Sensor 3 Circuit High 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: P242D Chevrolet indicates Exhaust Gas Temperature Sensor 3 Circuit High 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 8,487

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 P242D Chevrolet 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 greater than 900 Ω for greater than 2 s.

OBDII Code P242D Chevrolet - Exhaust Gas Temperature Sensor 3 Circuit High Voltage - AutoCodes.com — P242D Chevrolet Code - Exhaust Gas Temperature Sensor 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P242D Chevrolet?

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 P242D Chevrolet?

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 P242D Chevrolet 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 P242D Chevrolet code?

Need more information on how to fix the P242D Chevrolet code? Get Access to Factory Service Manuals

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Information for Specific Chevrolet Models

P242D 2014 Chevrolet Silverado — Exhaust Gas Temperature Sensor 3 Circuit High Voltage
P242D 2015 Chevrolet Silverado — Exhaust Gas Temperature Sensor 3 Circuit High Voltage
P242D 2016 Chevrolet Silverado — Exhaust Gas Temperature Sensor 3 Circuit High Voltage
P242D 2017 Chevrolet Silverado — Exhaust Gas Temperature Sensor 3 Circuit High Voltage
P242D 2018 Chevrolet Silverado — Exhaust Gas Temperature Sensor 3 Circuit High Voltage

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 P242D Chevrolet Code

1. What are the common symptoms of OBDII code P242D on a Chevrolet related to the Exhaust Gas Temperature Sensor 3 Circuit High Voltage?

- Common symptoms include the check engine light illuminating, reduced engine performance, and potential fuel efficiency issues.

2. What are the possible causes of OBDII code P242D Chevrolet indicating a high voltage in Exhaust Gas Temperature Sensor 3 Circuit?

- Potential causes may include a faulty Exhaust Gas Temperature Sensor 3, issues with the sensor wiring or connectors, or problems with the engine control module (ECM).

3. How can I diagnose the OBDII code P242D Chevrolet related to the high voltage in Exhaust Gas Temperature Sensor 3 Circuit?

- Diagnose the code by using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors of the sensor, and testing the sensor's resistance and voltage output.

4. Can a dirty exhaust system or particulate buildup cause OBDII code P242D on a Chevrolet with Exhaust Gas Temperature Sensor 3 Circuit High Voltage?

- Yes, a dirty exhaust system or excessive particulate buildup can potentially cause inaccurate readings from the sensor, triggering the high voltage fault code.

5. What are some repair tips for addressing OBDII code P242D Chevrolet related to Exhaust Gas Temperature Sensor 3 Circuit High Voltage?

- Repair tips include checking and cleaning the Exhaust Gas Temperature Sensor 3, inspecting and repairing any damaged wiring or connectors, and clearing the fault code with an OBDII scanner after performing repairs.

6. Can driving with the OBDII code P242D Chevrolet present cause further damage to the vehicle?

- Driving with the code present may not cause immediate damage, but it is recommended to address the issue promptly to prevent potential long-term damage to the exhaust system or engine components.

7. Is it safe to continue driving a Chevrolet with OBDII code P242D indicating a high voltage in Exhaust Gas Temperature Sensor 3 Circuit?

- It is generally safe to drive the vehicle with this code present, but it is advisable to have the issue diagnosed and repaired as soon as possible to avoid any potential performance or efficiency issues.

8. How much does it typically cost to repair OBDII code P242D Chevrolet related to the high voltage in Exhaust Gas Temperature Sensor 3 Circuit?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for sensor replacement or wiring repairs at a dealership or repair shop.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P242D Chevrolet themselves?

- Yes, a DIY enthusiast with basic automotive knowledge can attempt to repair this code themselves by following repair guides, using the right tools, and being cautious when working around the exhaust system.

10. How often does OBDII code P242D Chevrolet related to Exhaust Gas Temperature Sensor 3 Circuit High Voltage occur in vehicles?

- This specific code occurrence can vary, but it is relatively common in Chevrolet vehicles with Exhaust Gas Temperature Sensor 3 Circuit issues, particularly in models with high mileage or older vehicles.