Error Code P081D: What It Means & What To Do?

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The trouble code P081D can be explicated as Neutral Input Circuit. This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, Nissan, Peugeot, and Volkswagen vehicles. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model, powertrain configuration type, to another.

The brighter you are, the more you have to learn! That’s why we are here to provide you more knowledge about the P081D trouble code.

If the P081D fault code has been stored in your vehicle, then it would mean that the powertrain control module has detected some faults in the NEUTRAL input circuit of the neutral safety switch. This type of code is applicable to vehicles with automatic transmissions only.

What causes this problem with the Neutral Input Circuit?

• The neutral switch might be flawed
• Neutral switch harness might be opened or shorted
• There can be bad electrical connection in the neutral switch circuit

1. Auto Transmission Control Module - OBD Code P081D can appear because of faulty Auto Transmission Control Module.
2. Body Control Module Component - There can be some issues with the Body Control Module Component due to which you may see P081D code appearing over and over again. Visit us to buy best quality Body Control Module Component online.
3. Engine Control Module - Are you facing some faults in your Engine Control Module? Don’t worry and get them replaced or else P081D code can turn up.
4. Starter Relay - Common cause behind this P081D error code can be some fault in Starter Relay. So, it will be a good decision to replace them now.
5. Powertrain Control Module - Engine Control Module is perfectly fine but still but having that trouble code P081D flashing? In such a situation your Powertrain Control Module might be faulty. Why don’t you think of getting that replaced?

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 P081D here:

Common Symptoms

• Engine will not undertake
• Engine starts with the transmission in gear
• No other symptoms might be noticed

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 P081D:

• You must fix the defective powertrain control module
• Make sure to mend the faulty starter relay
• It is essential to restore the flawed auto transmission control module
• Repair or replace the quirky body control module component

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of vehicle specific diagnostic information will be required to diagnose a code P081D.

You may use your source of vehicle information to locate a technical service bulletin (TSB) that matches the vehicle year, make, and model; as well as the engine size, code/s stored, and symptoms exhibited. If you find one, it could yield helpful diagnostic information.

Use the scanner (connected to the vehicle diagnostic connector) to retrieve all stored codes and pertinent freeze frame data. It is a good idea to write this information down before clearing the codes then test-drive the vehicle until the PCM either enters readiness mode or the code is reset.

If the PCM enters readiness mode at this time, the code is intermittent and may be much more difficult to diagnose. If this is the case, the conditions which contributed to the code being stored may need to worsen before an accurate diagnosis can be made.

If the code is immediately reset, the next step of your diagnosis will require that you search your vehicle information source for diagnostic flow-charts, connector pinout charts, connector face views, and constituent testing methods.

Step 1

Use the DVOM to test NEUTRAL input voltage at the appropriate neutral position/shift selector switch. Typical NEUTRAL input circuits consist of either battery voltage (when activated) or ground (when deactivated).

Step 2

Use your source of vehicle diagnostic information and the DVOM to test neutral safety/shift selector switches as required. Replace switches that do not test within system parameters.

Step 3

If system switches and circuits are functional, use the DVOM to test NEUTRAL input circuits to the PCM. Disconnect all controllers prior to using the DVOM for testing.

• NEUTRAL input codes are most often attributed to neutral safety switch failure