AutoCodesGeneric – P242D

P242D 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 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 56,369
How popular is this code, among other codes? Medium
Table of contents Created and updated by William Orellana on Jul 03, 2022
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Code P242D 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 - Exhaust Gas Temperature Sensor 3 Circuit High Voltage - AutoCodes.com
P242D Code - Exhaust Gas Temperature Sensor 3 Circuit High Voltage

What are the Possible Causes of the DTC P242D?

  • 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?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P242D 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.

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Information for Specific Makes

  • P242D Audi — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
  • P242D Chevrolet — Exhaust Gas Temperature Sensor 3 Circuit High Voltage
  • P242D Dodge — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
  • P242D Ford — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
  • P242D GMC — Exhaust Gas Temperature Sensor 3 Circuit High Voltage
  • P242D Lincoln — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
  • P242D Mercury — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
  • P242D RAM — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
  • P242D Volkswagen — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
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 Code

1. What are the common symptoms of OBDII code P242D (Exhaust Gas Temperature Sensor 3 Circuit High Voltage)?

The common symptoms of this code may include the Check Engine Light coming on, reduced engine performance, increased fuel consumption, and potential exhaust system issues.

2. What are the possible causes of OBDII code P242D?

Possible causes of this code include a faulty exhaust gas temperature sensor, wiring issues in the sensor circuit, a malfunctioning sensor connector, or problems with the engine control module.

3. How can I diagnose OBDII code P242D?

Diagnosing this code typically involves using a scan tool to read the code, checking the exhaust gas temperature sensor 3 for proper operation, inspecting the sensor wiring and connector for any damage, and testing the sensor circuit for continuity.

4. Can a faulty exhaust gas temperature sensor cause OBDII code P242D?

Yes, a faulty exhaust gas temperature sensor 3 can trigger code P242D. It is important to ensure the sensor is functioning correctly and providing accurate data to the engine control module.

5. How serious is OBDII code P242D?

While this code may not cause immediate harm to the vehicle, it should be addressed promptly to prevent potential damage to the exhaust system and ensure optimal engine performance.

6. What are some repair tips for fixing OBDII code P242D?

Repair tips for this code may include replacing the faulty exhaust gas temperature sensor 3, repairing any damaged wiring or connectors in the sensor circuit, and clearing the code from the engine control module memory.

7. Can I drive with OBDII code P242D active?

It is generally not recommended to drive with this code active, as it can lead to reduced engine performance and potential long-term issues with the exhaust system. It is best to address the problem as soon as possible.

8. How much does it cost to repair OBDII code P242D?

The cost of repairing this code can vary depending on the cause of the issue, the cost of parts, and labor charges. It is advisable to consult with a professional mechanic for an accurate estimate.

9. How can I prevent OBDII code P242D from recurring?

To prevent this code from recurring, it is important to perform regular maintenance on the vehicle, including checking and replacing sensors as needed, ensuring proper wiring connections, and addressing any engine performance issues promptly.

10. Is it safe to clear OBDII code P242D without fixing the underlying issue?

Clearing the code without fixing the underlying issue is not recommended, as the problem may persist and potentially lead to more severe issues in the future. It is best to diagnose and repair the root cause of the code to ensure the vehicle operates correctly.

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