What is an ECU - Electronic Control Module?

What is an ECU?

An Engine Control Module or Electronic Control Module (ECU) acts as the brain for your car. In fact some people call it the brain box.

ECUs are generally used to monitor and control engine functions such as determining what position the gas pedal is at while idling. This allows the car to know that when you step on the accelerator how much gas it needs to feed the engine based on the amount of throttle you’re giving it.

ECUs also control transmissions, telling the car when to switch gears while driving an automatic transmission vehicle. It can adjust the gear ratio depending on what setting it is put in - such as reverse, drive, overdrive, or sport. 

And some ECUs (known as Body Control Modules) control the function of the windows, door locks, and sunroof - basically all the accessories in or on your vehicle.

Before manufacturers switched to using engine control modules and a large network of computers to control the vehicles functions, everything was manual. Typically the only non-mechanical item in an older vehicle was the radio. Windows, door locks, and all the basic functions drivers now expect in their vehicles were manually operated. 

One of the primary functions of an ECU is monitoring a series of a cars actions to register errors with how it is operating. If an error is detected the ECU will generate a trouble code.

Once the ECU notices the problem and generates the trouble code, it will cause the check engine light to come on. When you notice that your check engine light is on, you should take your car in to have it examined by a mechanic.

The mechanic will hook your car up to an OBD scan tool like the Autel MaxiScan MS300 CAN Diagnostic Scan Tool for OBDII Vehicles and will register any OBD error codes that it may be sending. At this point the mechanic will inspect the location of the error and advise you of any ECU repairs necessary.

Unfortunately if your ECU is malfunctioning you may need to have the ECU repaired or replaced. If your ECU is damaged or the motherboard is corroded you will need a total replacement. Corroded or burned ECUs are generally not repairable.

ECU’s are integral to the operation of modern cars. These are not simple mechanical devices that you should attempt to repair on your own. Make sure that if you are experiencing any problems with your ECU you take it in to a mechanic as soon as possible.

The average cost for a brand new ECU from the original manufacturer runs around $1,500 per unit. Refurbished ECUs like the ones AutoECMstore.com sells can cost a lot less and are a suitable replacement for your defective ECU.

AutoECMs has an extensive database of part numbers for most makes and models of cars/trucks/vans and more. The best way to confirm you are getting a suitable part is to pull the defective ECU from your vehicle to confirm the part number your specific automobile requires.

To learn more about ECUs, here are some good links that will explain the components of an engine's computer network.

https://en.wikipedia.org/wiki/Electronic_control_unit

https://en.wikipedia.org/wiki/Vehicle_bus

https://en.wikipedia.org/wiki/Body_control_module

https://en.wikipedia.org/wiki/Transmission_control_unit

https://en.wikipedia.org/wiki/Powertrain_control_module

Feel free to give us a call if you have any questions about your specific part or need to know availability and pricing. 1-800-900-0194 

DPC-402 Hardware Code Ford Engine Computers

The DPC-402 P/N is a hardware code for the PCM in a Ford truck or van. There are multiple engineering numbers associated with the DPC-402 hardware code.  

If you are looking for DPC-402 Ford PCM’s give us a call at AutoECMs to find out if we have the engine computer you need in stock.

AutoECMS sells remanufactured engine computers and can get you the part you need to get your FORD vehicle back on the road this week.

As much as we love talking to our customers on the phone, we are always super happy when you purchase a part on our webstore directly. We LOOOVE web orders!

If you place a web order you will receive an email from us saying we got your order... and we will send you a tracking number and receipt for your records to the email address you provide when you place the order. If you have any questions about your order, please don't hesitate to call or email us!

We process orders Monday through Friday between 8:30AM to 6PM. Orders which are received on the weekend will be processed the next business day.

Call AutoECMs anytime at 1-800-900-0194 for more information about FORD DPC-402 parts or to check availability and stock levels.

DPC-202 Hardware Code for FORD Engine Control Modules

The DPC-202 P/N is the hardware code for the PCM in your Ford truck or van. There are multiple engineering numbers associated with the DPC-202 hardware code.  

What the DPC-202 code means on the part is that any part with the DPC-202 code is interchangeable despite having different OEM numbers or Ford Catalog Numbers. The internal hardware is the same across multiple part numbers.

If you are looking for DPC-202 PCM’s give us a call at AutoECMs to find out if we have the engine computer you need in stock.

AutoECMS sells remanufactured engine computers and can get you the part you need to get your FORD vehicle back on the road this week.

As much as we love talking to our customers on the phone, we are always super happy when you purchase a part on our webstore directly. We LOOOVE web orders! If you place a web order you will receive an email from us saying we got your order... and we will send you a tracking number and receipt for your records to the email address you provide when you place the order. 

If you have any questions about your order, please don't hesitate to call or email us!

We process orders Monday through Friday between 8:30AM to 6PM. Orders which are received on the weekend will be processed the next business day.

Call us anytime at 1-800-900-0194 for more information about FORD DPC-202 parts or to check availability and stock levels!