P042E OBD Error Code: Problem & Solutions

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Is OBD code P042E flashing? Wondering what is P042E code? OBD code P042E relates to your vehicle’s exhaust gas recirculation “A”. This error code indicates that “A” control of the exhaust gas recirculation also known as EGR is stuck open. To know more about this error code, you will need to go through our following sections.

Exhaust Gas Recirculation system is tested by your vehicle’s engine control module while deceleration. The engine control module will expect a rise in MAP when the EGR valve is opened. If the ECM fails to detect that increase, then it will record the MAP difference. In case the powertrain control module checks that the amount of flow from the EGR is not as requested, then it will set the OBD error code P042E. To know more about this code and its common causes have a look at the following section.

What causes this problem with the Exhaust Gas Recirculation "A" Control Stuck Open?

• Problematic EGR Valves
• Clogged EGR Valve due to carbon or debris
• Faulty EGR control solenoid
• Electrical problems with the EGR “A” control circuit, such as a short
• Defective DPFE sensor
• Malfunctioning EGR valve position sensor
• Errors with the powertrain control module

1. EGR Valve - We have in stock high end EGR Valves for all makes and models. So, don’t waste time and get your hand on our best range of auto parts today.
2. EGR Control Solenoid - Need to undergo EGR Control Solenoid replacement? Worried about the cost? Well, you no longer need to worry about that as we have for you best priced EGR parts in stock for you.
3. EGR Valve Position Sensor - When it comes to car repairs, there are chances that not only one but several parts are damaged and demand replacement. So is the case with fixing obd code P042E, you might need EGR valve position sensor to get rid of the issue.
4. MAP Sensor - If you want or are looking for MAP sensor to fix your vehicle, we have good news for you. We have in stock pro MAP sensors for you and that too at the best prices ever online.
5. PCM - Looking for Powertrain Control Module, commonly known as PCM? If yes, then have a look at our collection.
6. Diagnostic Tools - You can choose from a wide selection of diagnostic tools on our website and make it easy on yourself when diagnosing problems and creating accurate solutions for your car.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P042E here:

Common Symptoms

• Rough idling
• Fall in fuel efficiency
• Lean exhaust
• Appearance of other codes

Here are some ways with the help of which you will be able to correct the OBD Code P042E.

To fix this code, replacing the exhaust gas recirculation valve is fewer common repairs. In case you only drive in town or take your vehicles on a short trip, chances are that the carbon build-up clogs your exhaust gas recirculation valve. This can block the flow of exhaust gases resulting in the valve to stuck open.

You can repair this you will might need parts such as egr valves, egr valve solenoid and more.

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P042E code to be stored:

In order to diagnose this error code, you will need few diagnostic tools such as a diagnostic scanner, a digital volt or ohmmeter and vehicle information source.

Your inspection should begin by visually inspecting the EGR system parts such as its related wiring and connectors. In case you come across any corroded, clogged or burnt out components, make sure to replace them.

Once done with replacing these components, the next step is to connect the scanner to the diagnostic port of your vehicle and restore all the stored codes and freeze the frame. Take a note of all the codes flashing and after clearing the codes, conduct a test drive of your vehicle to check what codes are reset.

Now, you will need to inspect the desired EGR position and the current EGR position as depicted by the data stream display. In case the actual EGR position conveys the message of EGR being open too far, be sure that there is a carbon piece clogging the EGR valves.

Now, you can remove the valve to check it but, in some vehicles, the location of the valve makes it difficult to remove it. In case you detect that there is no blockage in the EGR valve, follow the manufacturer’s recommendations for testing the EGR actuator solenoids. You can use a DVOM to test the individual circuits between the PCM and egr valve connectors.

Common Mistakes When Diagnosing the P042E Code

Few of the common mistakes that you can commit while diagnosing this P042E generic obd codes are listed as follows:

• EGR valve failure
• Powertrain Control Module (PCM) failure
• Wiring issue

P042F - Exhaust Gas Recirculation "A" Control Stuck Closed