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P242D 2014 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 3 Circuit High Voltage

Quick Answer

The P242D diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates a problem with the Exhaust Gas Temperature Sensor 3 Circuit High Voltage. Common causes include Faulty Exhaust Gas Temperature Sensor 3: The sensor itself may be malfunctioning and sending incorrect voltage signals to the ECM, Wiring or Connector Damage: Corrosion, fraying, or loose connections in the sensor circuit can disrupt the voltage readings, ECM Malfunction: A problem with the engine control module can also trigger this code by misinterpreting the sensor data. 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 2014 Chevrolet Silverado indicates Exhaust Gas Temperature Sensor 3 Circuit High Voltage.
Common causes
Common causes include Faulty Exhaust Gas Temperature Sensor 3: The sensor itself may be malfunctioning and sending incorrect voltage signals to the ECM, Wiring or Connector Damage: Corrosion, fraying, or loose connections in the sensor circuit can disrupt the voltage readings, ECM Malfunction: A problem with the engine control module can also trigger this code by misinterpreting the sensor data.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P242D 2014 Chevrolet Silverado Description

The P242D diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates a problem with the Exhaust Gas Temperature Sensor 3 Circuit High Voltage. This sensor is responsible for monitoring the exhaust gas temperature and providing data to the engine control module (ECM) to ensure optimal engine performance and emissions control. When the sensor detects a high voltage signal, it means that the exhaust gas temperature is higher than normal, which can lead to various issues with the vehicle's performance.

OBDII Code P242D 2014 Chevrolet Silverado - Exhaust Gas Temperature Sensor 3 Circuit High Voltage
P242D 2014 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 3 Circuit High Voltage

Common Causes of P242D 2014 Chevrolet Silverado

  1. Faulty Exhaust Gas Temperature Sensor 3: The sensor itself may be malfunctioning and sending incorrect voltage signals to the ECM.
  2. Wiring or Connector Damage: Corrosion, fraying, or loose connections in the sensor circuit can disrupt the voltage readings.
  3. ECM Malfunction: A problem with the engine control module can also trigger this code by misinterpreting the sensor data.
  4. Exhaust System Leak: A leak in the exhaust system can lead to higher exhaust gas temperatures, causing the sensor to detect a high voltage signal.
  5. Overheating Engine: Engine overheating can also result in high exhaust gas temperatures, triggering the sensor code.

Symptoms of P242D 2014 Chevrolet Silverado

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to the ECM entering a failsafe mode.
  3. Poor Fuel Efficiency: High exhaust gas temperatures can lead to inefficient combustion, resulting in decreased fuel economy.
  4. Increased Emissions: A malfunctioning exhaust gas temperature sensor can cause the vehicle to produce higher emissions than usual.
  5. Rough Idling: The engine may run rough or have irregular idling patterns due to the sensor issue affecting engine performance.

How to Fix P242D 2014 Chevrolet Silverado

  1. Diagnose the Issue: Use a diagnostic scan tool to retrieve the specific DTC and pinpoint the underlying cause of the high voltage signal.
  2. Inspect Sensor and Wiring: Check the Exhaust Gas Temperature Sensor 3 and its wiring for any visible damage, corrosion, or loose connections.
  3. Replace Sensor: If the sensor is faulty, replace it with a new one and ensure proper installation and connection.
  4. Repair Wiring or Connectors: Repair or replace any damaged wiring or connectors in the sensor circuit to restore proper voltage readings.
  5. Clear Codes and Test Drive: Clear the DTC from the ECM memory, reset the system, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P242D 2014 Chevrolet Silverado

The typical repair costs for addressing the P242D code on a 2014 Chevrolet Silverado can range from $200 to $500, including parts and labor. This estimate may vary depending on the specific cause of the issue, the cost of the replacement sensor, and the labor rates at the auto repair shop. It's important to consider that diagnosis time and labor rates can vary based on location, vehicle make and model, and engine type. It's recommended to consult with a professional mechanic or service center to get a more accurate estimate based on your specific circumstances.

What does this mean?

Tech Notes for P242D 2014 Chevrolet Silverado

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.

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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 P242D 2014 Chevrolet Silverado Code

1. What are common symptoms of OBDII code P242D in a 2014 Chevrolet Silverado?

Symptoms may include the Check Engine Light illuminating, decreased fuel efficiency, and potential issues with the exhaust gas temperature sensor.

2. What does OBDII code P242D indicate for a 2014 Chevrolet Silverado?

Code P242D indicates a high voltage condition in the circuit of Exhaust Gas Temperature Sensor 3 in the vehicle's exhaust system.

3. What are possible causes of OBDII code P242D in a 2014 Chevrolet Silverado?

Potential causes include a faulty exhaust gas temperature sensor, damaged wiring or connectors related to the sensor, or issues with the sensor's circuit.

4. How can I diagnose the cause of OBDII code P242D in my 2014 Chevrolet Silverado?

Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the exhaust gas temperature sensor and its connections, and testing the sensor's circuit for proper voltage levels.

5. Can driving with OBDII code P242D in a 2014 Chevrolet Silverado cause further damage?

Continued driving with this code present may lead to decreased engine performance, potential damage to the catalytic converter, and increased emissions output.

6. How can I repair OBDII code P242D in a 2014 Chevrolet Silverado?

Repair options may include replacing the exhaust gas temperature sensor, repairing or replacing damaged wiring or connectors, and clearing the fault code with an OBDII scanner.

7. Can I reset OBDII code P242D in my 2014 Chevrolet Silverado without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily turn off the Check Engine Light, as the issue triggering the code will persist and likely trigger the code again.

8. Is it safe to continue driving my 2014 Chevrolet Silverado with OBDII code P242D?

While the vehicle may still be operable with this code, it's recommended to address the issue promptly to prevent potential damage to other components and ensure optimal engine performance.

9. How much does it typically cost to repair OBDII code P242D in a 2014 Chevrolet Silverado?

Costs can vary depending on the specific repairs needed, but replacing the exhaust gas temperature sensor or repairing wiring/connectors may range from $150 to $400, including parts and labor.

10. Can a DIY enthusiast fix OBDII code P242D in a 2014 Chevrolet Silverado?

Depending on their skill level and access to tools, a DIY enthusiast may be able to address this code by replacing the exhaust gas temperature sensor or repairing wiring issues, following proper procedures and safety precautions.

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