AutoCodes – Generic – P242A

P242A Code - Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3

Quick Answer

The Powertrain Control Module (PCM) continuously monitors the Exhaust Gas Temperature Sensor (EGTS) for proper circuit continuity and out of range high values. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) Bank 1 Sensor 3, Exhaust Gas Temperature Sensor Bank 1 Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor Bank 1 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
P242A indicates Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3.
Common causes
Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) Bank 1 Sensor 3, Exhaust Gas Temperature Sensor Bank 1 Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor Bank 1 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 72,556
How popular is this code, among other codes? Medium
Table of contents Created and updated by William Orellana on Jan 15, 2019
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Code P242A Description

The Powertrain Control Module (PCM) continuously monitors the Exhaust Gas Temperature Sensor (EGTS) for proper circuit continuity and out of range high values. The EGTS is located in front of the Diesel Oxidation Catalyst (DOC) and/or in front of the Diesel Particulate Filter (DPF). The EGTS detects exhaust gas temperature and converts it into a voltage and feeds back to the PCM with the voltage signal in order to control engine conditions to effectively reduce emissions. The PCM sets the P242A OBDII code when the Exhaust Gas Temperature Sensor is out of factory specifications.
OBDII Code P242A - Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3 - AutoCodes.com
P242A Code - Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3

What are the Possible Causes of the DTC P242A?

  • Faulty Exhaust Gas Temperature Sensor (EGTS) Bank 1 Sensor 3
  • Exhaust Gas Temperature Sensor Bank 1 Sensor 3 harness is open or shorted
  • Exhaust Gas Temperature Sensor Bank 1 Sensor 3 circuit poor electrical connection
  • Exhaust leaks
  • Excessive particulate matter buildup on sensor

How to Fix the DTC P242A?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P242A 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 P242A code?

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Information for Specific Makes

  • P242A Chevrolet β€” Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3
  • P242A Dodge β€” Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3
  • P242A Ford β€” Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3
  • P242A GMC β€” Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3
  • P242A Lincoln β€” Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3
  • P242A Mercury β€” Exhaust Gas Temperature Sensor Circuit 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 P242A Code

1. What are common symptoms of OBDII code P242A (Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3)?

- Common symptoms include poor engine performance, reduced fuel efficiency, and illuminated check engine light.

2. What could cause OBDII code P242A to trigger?

- This code is typically triggered by a faulty exhaust gas temperature sensor, wiring issues, or a problem with the sensor's circuit.

3. How can I diagnose the cause of OBDII code P242A?

- To diagnose this code, you may need to perform a visual inspection of the sensor and its wiring, test the sensor's resistance, and check for any loose connections.

4. Can I still drive my vehicle with OBDII code P242A present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potential safety issues.

5. How can I repair OBDII code P242A?

- Repairing this code may involve replacing the exhaust gas temperature sensor, repairing or replacing damaged wiring, or addressing any issues with the sensor's circuit.

6. Are there any tips for preventing OBDII code P242A from recurring?

- Regular maintenance of the exhaust system, including inspecting and cleaning the sensor, can help prevent this code from recurring.

7. Can a DIY enthusiast fix OBDII code P242A?

- While some experienced DIY enthusiasts may be able to address this code, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. Is OBDII code P242A a serious issue?

- OBDII code P242A should be addressed promptly to prevent potential damage to the exhaust system and ensure optimal vehicle performance.

9. How long does it typically take to repair OBDII code P242A?

- The repair time for this code can vary depending on the exact cause and complexity of the issue, but it may take a few hours to complete.

10. Can resetting the check engine light resolve OBDII code P242A?

- Resetting the check engine light may temporarily clear the code, but it will likely return if the underlying issue is not addressed.

Discuss the causes and fixes for P242A OBDII Code

  • I have a p242a code showing on my t30 transporter , I know it's a exhaust tenp sensor but which 1 , I have no lack of power !
    Can anyone help to find which 1 it is as there is 3 !

  • What model and year is your vehicle?

  • Ihave this code in my Golf Vi tdi 1.6. What is the real problem. Do I have to chanche the sensor of temperature ou exaust gaz?

  • There are some test that needs to be done to determine exactly what the problem is, but based on the code, you do have to replace the sensor.

  • red male to black female red sensor is 2 and black female sensor 1 you swap sensors but will have to clip off ring around red male, both sensors are tucked back between engine and battery and look like square connectors on cables

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