Fault code P06D1 – internal control module ignition coil control performance

Fault code P06D1 is called “Internal Control Module Ignition Coil Control Performance” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.

Technical description and explained code P06D1

Stored code P06D1 means that the Powertrain Control Module (PCM) has detected a fault. Which is related to an internal processor error and the ignition coil control system.

Fault code P06D1 – internal control module ignition coil control performance

If code P06D1 is stored in memory, this indicates that the Powertrain Control Module (PCM) has detected an internal processor error with the ignition coil control system. Other controllers may also detect an internal PCM error (with ignition coil control) and cause code P06D1 to be stored.

The internal control unit control processors are responsible for various controller self-diagnostic functions and overall internal control unit reporting. The ignition coil control system inputs and outputs are subject to self-tests and are continuously monitored by the PCM and other controllers.

In addition to performing internal controller self-tests, the Controller Area Network (CAN) also compares signals from each individual module. These tests are performed simultaneously to ensure that each controller is functioning properly.

If the PCM detects an internal mismatch in the ignition coil control processor. A P06D1 code will be stored in memory and the Malfunction Indicator Light (MIL) may illuminate.

The code will also be stored if the PCM detects a problem between any of the onboard controllers. Which will indicate an internal ignition coil control system error. It may take several failure cycles for the Malfunction Indicator Lamp (MIL) to illuminate, depending on the perceived severity of the fault.

Symptoms of vehicle malfunctions

The main signal that an error P06D1 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.

It can also be warning signs such as:

  1. The “Check engine” control lamp on the control panel will light up (the code will be recorded in the memory as a fault).
  2. Ignition skips in the engine cylinders may occur. Also the car engine may run unstable.
  3. Floating revolutions, as well as attempts to stall at idle.
  4. The engine does not accelerate well.
  5. Increased fuel consumption.

A module processor failure on internal control should be categorized as a serious code. A stored fault P06D1 can suddenly and without warning lead to serious driveability problems.

Factors that can cause this error code

The error code P06D1 can mean that one or more of the following problems have occurred:

  • Open or shorted primary/secondary ignition circuits.
  • Faulty ignition coils or coil assemblies.
  • Faulty crankshaft position sensor or its circuits.
  • CAN bus may be defective and have a short to ground or wire breakage.
  • Insufficient grounding of the control module.
  • Sometimes the cause is the PCM itself.

How to fix or reset OBD-2 code P06D1

Some suggested steps for troubleshooting and fix the error code P06D1:

  1. Read all stored data and error codes with an OBD-II scan tool. To find out when and under what circumstances fault P06D1 appeared.
  2. Clear the error codes from the computer memory and test-drive the vehicle to find out if the fault appears again.
  3. Check the ignition coils as well as the circuits and connectors.
  4. If the error code appears again, visually inspect the control module (PCM) electrical leads and connector.
  5. Measure battery voltage and compare with manufacturer’s specification.
  6. Check the continuity of the PCM power and ground circuits with a multimeter.
  7. Evaluate the Control Module (PCM) operation following the vehicle manufacturer’s procedure.
  8. Clear the error code from the computer memory again, and test drive the vehicle to determine if the problem has been resolved.

Diagnose and repair of problems

If ECM/PCM power codes are present, they must be cleared before attempting to diagnose fault P06D1. Also, if ignition coil codes are present, they must be eliminated first.

Next, you need to connect the scan tool to the vehicle’s diagnostic port and retrieve any stored codes and data. Make a note of this information in case the code turns out to be intermittent.

After recording all the necessary information, clear the codes and test drive the vehicle until the code is cleared or the PCM goes into standby mode. If the PCM goes into standby mode, the code is intermittent and will be more difficult to diagnose.

Check the controller and electrical parts

Use a multimeter to check the fuses and power relays on the controller. Check and replace blown fuses if necessary. Fuses should be checked with the circuit loaded.

If all fuses and relays are working as they should, a visual inspection of the controller wiring and harnesses should be performed. Chassis and motor grounding should also be checked.

Visually inspect the system controllers for signs of water, temperature, or collision damage. Any controller that is damaged, especially by water, should be considered faulty.

If the power and ground circuits of the controller are intact, it is likely that the controller itself is defective or that a programming error exists. Reprogramming the control module will be necessary to replace it.

Unlike most other codes, fault P06D1 is most likely caused by a faulty controller or its programming error.

Some aftermarket PCM manufacturers offer preprogrammed controllers for certain models. Contact your auto parts supplier with the vehicle serial number, mileage, and other pertinent information.

On which vehicles does this problem occur most frequently

Fault code P06D1 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:

  • Volkswagen

Fault code P06D1 can sometimes be found with other errors. The most common are the following: P060A, P060B, P060C, P060D, P060E.

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