Fault code P061D is called “Internal Control Module Engine Air Mass 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 P061D
Stored code P061D means that the Powertrain Control Module (PCM) has detected an internal performance error in the mass airflow control system. Other controllers may also detect a PCM processor performance error and cause this code to be stored.
Internal module monitoring is responsible for various controller self-test functions and overall accountability. Engine RPM system inputs and outputs are self-tested and monitored continuously by the PCM.
Engine mass flow rate is monitored by the PCM using input signals from the MAF sensor. The desired engine mass flow rate (MAF) value is programmed into the PCM.
The actual engine mass flow rate is calculated using inputs from the MAF sensor as well as the throttle position sensor (TPS). The desired engine mass flow rate is then compared to the actual.
After comparing the desired and actual engine mass flow rate, the PCM makes the necessary adjustments to the fuel supply and ignition timing.
When the ignition is on and the PCM is energized, numerous self-tests of the internal controller processing are initiated. In addition to performing self-tests, the Controller Area Network (CAN) also compares signals from each individual module. To ensure that each controller is operating properly, these tests are performed simultaneously.
If the PCM detects a discrepancy between the desired mass flow rate and the actual mass flow rate, indicating an internal processor error. Then code P061D will be stored and the Malfunction Indicator Light (MIL) may illuminate.
It may take several failure cycles for the MIL indicator lamp to illuminate, depending on the perceived severity of the fault.
Symptoms of vehicle malfunctions
The main signal that an error P061D has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.
It can also be warning signs such as:
- The “Check engine” control lamp on the control panel will light up (the code will be written in the memory as a fault).
- Engine Ignition Skip Codes may be present.
- Slowing down or stalling during acceleration.
- Ignition skips in the engine.
- Increased fuel consumption.
The module processor malfunction in the internal control should be categorized as a serious code. Stored error P061D can suddenly and without warning lead to serious driving problems.
Factors that can cause this error code
The error code P061D can mean that one or more of the following problems have occurred:
- Faulty mass air flow sensor (MAF).
- Open or short circuit in wiring harness.
- Corroded electrical connector of mass air flow sensor (MAF).
- CAN bus may be faulty and shorted 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 P061D
Some suggested steps for troubleshooting and fix the error code P061D:
- Read all stored data and error codes with an OBD-II scan tool. To find out when and under what circumstances error P061D appears.
- Clear the error codes from the computer memory, and test-drive the vehicle to find out if the malfunction occurs again.
- Check the mass air flow sensor (MAF) and circuits and connectors.
- If the error code appears again, visually inspect the control module (PCM) electrical leads and connector.
- Measure battery voltage and compare with manufacturer’s specification.
- Check the continuity of the PCM power and ground circuits with a multimeter.
- Evaluate the Control Module (PCM) operation following the vehicle manufacturer’s procedure.
- 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 supply codes are present, they must be cleared before attempting to diagnose error P061D. Also, if mass air flow sensor (MAF) or throttle position sensor (TPS) codes are present, they must be cleared first.
Next, 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, error P061D 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 your vehicle’s serial number, mileage, and other pertinent information.
On which vehicles does this problem occur most frequently
Fault code P061D can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:
- Chevrolet
- Fiat
- Ford (Edge, Fiesta, Fusion)
- Kia
- Land Rover (Freelander)
- Lincoln
- Mazda (CX-5)
- Mercedes-Benz
- Volvo
Fault code P061D can sometimes be found with other errors. The most common are the following: P061A, P061B, P061C, P061E, P061F.
