Error Code P02E3: What It Means & What To Do?

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The diesel intake air flow control system is generally bolted to the intake manifold in the intake air stream. The amount of incoming airflow would be controlled by the DIAFCS system by varying a signal to a motor which is operated by the powertrain control module. The throttle plate which is opened or closed by the motor regulates the airflow.

The fault code P02E3 diesel intake air flow control circuit low is set when there is a detected low electrical condition in the diesel intake air flow control system. It would be set when the voltage at the motor control would stay below a set level for a longer period of time. This trouble code is generally considered to be an electrical circuit problem.

OBD code P02E3 can be defined as diesel intake air flow control high.

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

What causes this problem with the Diesel Intake Air Flow Control Circuit High?

• The DIAFCS motor/control might be failed
• The powertrain control module might be imperfect
• There can be a short to ground in the signal circuit to the DIAFCS motor/control

1. Air Intake System - OBD Code P02E3 can appear because of faulty Air Intake System.
2. Powertrain Control Module - There can be some issues with the Powertrain Control Module due to which you may see P02E3 code appearing over and over again. Visit us to buy best quality PCM online.
3. Throttle Body - Are you facing some faults in your Throttle Body? Don’t worry and get them replaced or else P02E3 code can turn up.
4. Engine Control Module - Common cause behind this P02E3 error code can be some fault in Engine Control Module. So, it will be a good decision to replace them now.

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 P02E3 here:

Common Symptoms

• Possible low idle speed
• No regeneration of the diesel particulate filter to burn off the soot build up
• There can be a malfunction in the indicator light on
• Loss of power
• Electronic throttle control symbol might start flashing

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P02E3:

• Make sure that you replace the defective engine control module
• The air intake system should be repaired or replaced
• Replace the powertrain control module
• You can always replace defective throttle body

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

• The first thing which you should do is to inspect the technical service bulletins in your vehicle. Your issue may be a known issue with a known fix put out by the manufacturer and can save a lot of time as well as money during the process of diagnosis. After that you must locate the DIAFCS motor/control system on your vehicle. The motor/control is generally bolted to the intake manifold in the intake air stream. Once it is located, the connector and wiring should be visually inspected. You must look for the scraping, rubbing, bare wires, burn spots or melted plastic. The connector should be pulled apart and the terminals should be carefully checked which are located inside the connector. Inspect they look burned or have a green tint indicating corrosion. You must use electrical contact cleaner and a plastic bristle brush if there is a requirement of cleaning of the terminals. Let dry and electrical grease should be applied where the terminals contact.
• If a mechanical code was triggered, then you must use an intake cleaner and a clean rag to wipe out the carbon deposits behind the throttle plate of the motor control system. Spray the cleaner onto the rag and wipe out the deposits with the rag. Make sure that you never spray these deposits into the engine, as they can cause bad running, misfires and with enough intake cleaner, catalytic converter damage and possibly engine damage. If you have a scan tool, then the diagnostic trouble codes from memory should be cleared, and see if P02E3 code returns. If it does not, then the connections were most likely your problem. If you find out that the P02E3 code is not returning, then you must test the DIAFCS and its associated circuits.
• With the Key Off, the electrical connector should be disconnected at the DIAFCS motor/control. Connect a digital voltmeter black lead to the ground terminal at the DIAFCS motor/control wiring harness connector. Connect the red lead of the digital voltmeter to the motor terminal at the DIAFCS sensor wiring harness connector. Turn key on engine off. Check the manufacturer’s specifications; voltmeter should read 12 volts. If not, then you must repair the power or ground wire, or the powertrain control module should be replaced. Check manufacturer's specifications for complete test procedures on your specific vehicle if unsure. If the prior test passed and you continue to get a P02E3, this would most likely indicate a failed DIAFCS motor/control, although a failed PCM could not be ruled out until the DIAFCS motor/control had been replaced. If unsure, seek assistance from a trained automotive diagnostician. PCMs must be programmed or should be calibrated to the vehicle for proper installation.

Common Mistakes When Diagnosing The P02E3 Code

• There can be infirmity in the throttle body assembly
• Faults in the powertrain control module
• Foible wiring