P242E - OBD Trouble Code

<<See All OBD Codes

The trouble code P242E can be defined as Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 3. Now you might be thinking that what does “Bank 1 Sensor 3” means? Keep reading further. Bank 1 refers to the back of cylinders without the number one cylinder. The sensor 3 would be the third exhaust gas temperature sensor from the motor following the exhaust to the rear of the automobile. The exhaust gas temperature sensor is being monitored by the engine control module. This trouble code would be set by the ECM when the exhaust gas temperature sensor circuit would not be as per the specifications set by the manufacturer.

We learn more by looking for the answer to a question. That’s the reason why we are here to provide you the answers for all your questions. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile. This error code would start appearing when there is an issue with the EGT sensor or electrical wiring which operates the sensor.

What causes this problem with the Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 3?

• EGT sensor might face rough operating conditions
• Malfunctioning EGT sensor
• Some issues related to the Catalytic converter
• There can be inoperative ECM
• An engine might not be working at the right operating temperature
• Catalytic converter might be very slow to heat up

1. Engine Control Module – It is not always the components, but the ECM that can also be faulty. It can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
2. Diesel Exhaust Fluid Pump – The diesel exhaust fluid pump is usually located in the cover of the transmission. It draws fluid from a pump in the bottom of the transmission and feeds it to the hydraulic system. It also feeds the transmission cooler and the torque converter. Thus, replace faulty fluid pump now!
3. Powertrain Control Module - Powertrain Control Module can also be faulty in rare cases and thus needs through checks for system and software errors. Thus check and replace it, if required.
4. Electronic Control Unit – The ECU manages the cooling system to control the battery operating temperatures and thus must be replaced, if found faulty. Thus, buy new ECU modules and components from us!
5. Diagnostic Tool – Make use of quality diagnostic tools to resolve any OBD error code. Buy quality diagnostic tools from us!
6. Fuel Injector – The fuel injector is a small nozzle into which liquid fuel is injected at high pressure. It works like a spray nozzle of a pressure washer. The placement of the injector can be in a different part of the engine depending upon the type of fuel injection system is being used. High pressure from the fuel pump feeds the fuel to the fuel injector. Thus, replace damaged fuel injector now!

After knowing all the cause behind the issues, let’s have a look at few common symptoms of this problem. Read through this section to learn more about this error code.

Common Symptoms

• Visibility in the check engine light
• Decrease in the power output mode into the ECM

Here are some ways with the help of which you will be able to correct the OBD Code P242E:

It is essential to reprogram the ECM to adapt to unexpected situations

• Repair or replace the quirky EGT sensor
• The ECM should be instructed to perform diesel particulate filter regeneration
• Carefully adjust the faults in the wiring damage in the EGT sensor circuit
• Recondition the non-functioning ECM
• Adjust the flawed catalytic converter

Apart from this, you might need to replace other damaged parts too like catalytic converter, pcm, oxygen sensor, ohmmeter, exhaust gas temperature, exhaust system, air fuel ratio sensor and more. You can easily find all these parts with us. Not only that you can get these parts shipped to your door free, if your cart value happens to exceed $99.

Here are some steps which you should follow in order to diagnose this fault code:

• A technician begins by hooking the vehicle to an OBD-II scanner to verify that the code is present, and check for other codes. The freeze frame data along with current data is recorded, and the codes are then cleared to see if they reoccur.
• The trouble shooting specifications of each and every manufacturer would differ and that’s why here is a list of some common procedures which should be followed:
• Carefully inspect if there is any stored code and make sure to first diagnose all other relevant codes.
• Then the freeze frame data should be inspected properly. After that the technician should check all the exhaust system parts.
• The sensor connector should be removed and then examine for issues related to voltage and resistance.
• You can always perform suitable voltage and resistance tests as per the specifications of the manufacturer.
• Observe the exhaust gas temperatures by performing a test drive of the vehicle.
• Carefully remove the EGT sensor from the exhaust and then check for signs of contamination.
• If all the components check out, inspect for the fault in the PCM as it can sometime store wrong OBD code and thus might need replacement or reprogramming.

Common Mistakes When Diagnosing The P242E Code

• A big mistake which is made by a lot of people is that they do not diagnose the error code which is appearing first, and before that they would start diagnosing other relevant codes which can cause more problems.
• Sometimes, the mechanic might simply replace the sensor without even investigating why the code was set,
• Other issue can be confusion in the mind of the mechanic regarding the right location of the sensor.
• The technician might fail to examine the wiring harness and the entire exhaust system.