Ford PCM | Ford ECM | Ford ECU

The Ford Powertrain Control Module (PCM) is an essential computer system that plays an important in how your vehicle drives daily. It helps control the engine and transmission, stores diagnostic information, and generates diagnostic trouble codes if there is a problem with the powertrain system. By providing input from various sensors and controllers located throughout the vehicle, including the engine, transmission, and other systems, it enables your Ford to function optimally for optimal performance and efficiency.

If the computer module in your Ford fails, it can cause a range of issues with the engine, transmission, and any electrical components that are connected. This can greatly affect the performance of your vehicle, leading to decreased power and fuel efficiency as well as a greater risk of breakdown or accident. Some signs that your Ford PCM may be failing are:

• Check Engine Light or other warning light is illuminated. The check engine light usually turns on when something is wrong with the car.

• Decreased engine power and/or acceleration. The car may not go as fast or it might be harder to start it.

• Difficulty starting the vehicle. You might hear weird noises coming from the engine when you turn it on.

• Strange noises coming from the engine. The car may shake if you don't drive it properly or if the engine is not working correctly.

• Vehicle shakes while idling or accelerating. The car may shake if you don't drive it properly or if the engine is not working correctly.

• Erratic transmission shifts and jerking sensation when shifting gears. When shifting gears, you might feel a jerking sensation and have trouble shifting smoothly between gears.

• Issues with electrical components. If there are problems with other electrical components such as headlights, radio, etc., they won't work properly either.

• Physical Damage: Any impact that renders the PCM inoperable, such as a collision or other outside event, can cause PCM failure. This could be due to internal wiring damage, broken components, or simply the inability for the PCM to receive and interpret signals properly.

• Electrical Issues: Electrical issues within the vehicle's wiring system, such as a short circuit or damaged wires, can also cause PCM failure. The PCM relies on the electrical signals sent by various sensors throughout the vehicle in order to properly control and monitor engine performance. If a wire becomes damaged or disconnected, it will not be able to send its signal to the PCM, resulting in an inability to receive vital engine information.

• Human Error: Faulty installation can also lead to PCM failure. Improper installation of the unit or incorrect wiring will prevent the PCM from communicating with the vehicle's sensors, leading to an inability to effectively control and monitor engine performance.

• Overheating: The PCM is responsible for controlling and monitoring the temperature of the engine. If it is unable to do so, the PCM can become damaged from overheating, resulting in failure. Additionally, if the vehicle's cooling system is not functioning correctly, or the PCM does not receive its proper voltage supply, it can overheat and fail.

• Software Issues: Oftentimes, the PCM's software can become corrupted or outdated due to improper installation. This can lead to an inability for the PCM to accurately interpret signals from the vehicle's sensors, resulting in failure.

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Diagnostic Trouble Codes That Relates to the PCM

Diagnostic Trouble Codes (DTCs) are codes that are stored by a vehicle's on-board diagnostic (OBD) system when it detects a fault with the vehicle's powertrain system.

• P0100: Mass or Volume Air Flow Circuit Malfunction
• P0101: Mass or Volume Air Flow Circuit Range/Performance
• P0102: Mass or Volume Air Flow Circuit Low Input
• P0103: Mass or Volume Air Flow Circuit High Input
• P0110: Intake Air Temperature Circuit Malfunction
• P0113: Intake Air Temperature Sensor 1 Circuit High
• P0172: System Too Rich (Bank 1)
• P0120: Throttle/Pedal Position Sensor/Switch "A" Circuit Malfunction
• P0130: Oxygen Sensor Circuit Malfunction (Bank 1, Sensor 1)
• P0131: Oxygen Sensor Circuit Range/Performance (Bank 1, Sensor 1)
• P0132: Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 1)
• P0133: Oxygen Sensor Circuit Slow Response (Bank 1, Sensor 1)
• P0134: Oxygen Sensor Circuit Intermittent (Bank 1, Sensor 1)
• P0135: Oxygen Sensor Circuit Malfunction (Bank 1, Sensor 2)
• P0136: Oxygen Sensor Circuit Range/Performance (Bank 1, Sensor 2)
• P0137: Oxygen Sensor Circuit Low Voltage (Bank 1, Sensor 2)
• P0138: Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2)
• P0139: Oxygen Sensor Circuit Intermittent (Bank 1, Sensor 2)
• P0140: Oxygen Sensor Circuit Malfunction (Bank 2, Sensor 1)
• P0141: Oxygen Sensor Circuit Range/Performance (Bank 2, Sensor 1)
• P0142: Oxygen Sensor Circuit Low Voltage (Bank 2, Sensor 1)
• P0143: Oxygen Sensor Circuit High Voltage (Bank 2, Sensor 1)
• P0144: Oxygen Sensor Circuit Intermittent (Bank 2, Sensor 1)
• P0646: 

Here is a list of some diagnostic trouble codes (DTCs) that begin with the letter "U" and could potentially indicate a fault with the powertrain control module (PCM) in a vehicle:

• U0100: Lost Communication with Engine Control Module/Powertrain Control Module
• U0101: Lost Communication with Transmission Control Module
• U0102: Lost Communication with Transfer Case Control Module
• U0103: Lost Communication with Throttle Actuator Control Motor Circuit
• U0104: Lost Communication with Throttle Actuator Control Motor Circuit Range/Performance
• U0105: Lost Communication with Throttle Actuator Control Motor Circuit Low
• U0106: Lost Communication with Throttle Actuator Control Motor Circuit High
• U0107: Lost Communication with Throttle Actuator Control Motor Circuit Intermittent
• U0108: Lost Communication with Throttle Actuator Control Motor Circuit Open
• U0109: Lost Communication with Throttle Actuator Control Motor Circuit Short to Ground
• U0110: Lost Communication with Throttle Actuator Control Motor Circuit Short to Battery
• U0111: Lost Communication with Throttle Actuator Control Motor Circuit Short to Power
• U0112: Lost Communication with Throttle Actuator Control Motor Circuit Short to Ground
• U0113: Lost Communication with Throttle Actuator Control Motor Circuit Short to Battery
• U0114: Lost Communication with Throttle Actuator Control Motor Circuit Short to Power
• U0115: Lost Communication with Throttle Actuator Control Motor Circuit Failure
• U0116: Lost Communication with Throttle Actuator Control Motor Circuit Range/Performance

Note: These codes are just a small sample and there are many other DTC codes that could potentially indicate a fault with your Ford engine computer. Additionally, the specific codes that are relevant will depend on the make and model of the vehicle. It is important to consult the vehicle's service manual or a professional mechanic for more information about interpreting DTC codes.