A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Engine Control Unit Skoda Fabia 1.2 TDI Delphi DCM3.7 03P906021K 28281647
Vendors's code: 28281647
Product code: 28281647
Barcode:
Code 39:
ISBN:
€284.55
Price
€284.55
€350.00
Price
€350.00
Select a product option:
Individual variants may differ in price
product option
Important: Depending on the ECU type and vehicle model, not all of the options listed below may be available.
To select the correct option for your vehicle and ECU, please contact us before purchasing:
contact@auto24parts.com
1. Locked
This option is intended for professional workshops with the required specialist equipment and technical knowledge.
The ECU has been removed from a vehicle intended for recycling and still contains the immobilizer data and other information from the previous vehicle. Before it can be used in another car, it must be unlocked and then programmed using specialist automotive diagnostic equipment.
2. Unlocked
Several preparation methods may be available. The possible options depend on the ECU type, vehicle model and immobilizer system. Please contact us before purchasing, as some preparation methods are not available for every ECU.
Our electronics specialists can prepare the ECU in one of the following ways:
a) ECU with PIN code (Car Pass)
The PIN code is supplied, but programming with a suitable diagnostic tool is still required. After installing the ECU, it must be reset using the supplied PIN code and then programmed to the vehicle’s immobilizer system.
b) VIRGIN ECU
The data from the previous vehicle is removed and the ECU is restored to a clean, factory-like state. After installation, it must be programmed to the vehicle using a compatible specialist diagnostic tool. Unless another preparation method is specified in the product description, this is the standard unlocking option for most of our ECUs.
c) Plug & Play – IMMO OFF
The immobilizer function is disabled in the ECU. After installation, the engine can start without additional immobilizer programming. Please note that the vehicle will no longer have an active immobilizer function, and an immobilizer warning light or fault code may remain, depending on the vehicle model.
d) Plug & Play – Automatic Programming
After installation, the ECU automatically learns and saves the required vehicle data. No additional programming is normally required.
e) Plug & Play – 1:1 Clone
The data from your original ECU is copied to another fully functional ECU. The cloned unit is then ready for installation without additional programming.
You must send us your original ECU so that we can transfer its data to the replacement unit.
The original ECU must have working communication with the vehicle, a diagnostic tool or our programming equipment. If the required data cannot be read, a complete 1:1 clone may not be possible.
3. Complete Plug & Play Set
A complete matched set containing the ECU, immobilizer components and all other parts required to start the vehicle without additional programming. All components supplied in the set must be installed in the vehicle.
Important:
Dispatch time depends on the selected option. If an unlocked or specially prepared version is ordered, the preparation service usually requires an additional 1–2 business days.
Ask about the product
Engine Control Unit Skoda Fabia 1.2 TDI Delphi DCM3.7 03P906021K 28281647
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€30.00
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(Poland)
from
€30.00
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shipping
(Poland)
Price 30 euros applies shipments to 5 kg on worldwide. Above this weight, please contact us by email to check price
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Looking for a Delphi DCM3.7 03P906021K ECU for a Fabia 1.2 TDI?
This Delphi DCM3.7 unit has the VW number 03P906021K and the Delphi number 28281647. It comes from a Skoda Fabia 1.2 TDI, is used and fully working, and we ship it locked or unlocked.
Engine Control Unit Skoda Fabia 1.2 TDI Delphi DCM3.7 03P906021K 28281647
DCM3.7 is a family of Delphi ECUs for diesel engines. This unit was fitted to a Skoda Fabia 1.2 TDI and carries the VW number 03P906021K and the manufacturer number 28281647. The ECU controls fuel injection and works with the immobiliser.
Markings on the casing
- 03P906021K – VW/Skoda part number
- 28281647 – Delphi number
- DCM3.7 – Delphi ECU type
The same VW number can appear with different Delphi numbers, so compare 28281647 as well. The letter K at the end of 03P906021K indicates the version and also matters.
When might the ECU need replacing?
- the engine cuts out while driving or will not start at all,
- the glow plug or engine warning light comes on for no obvious reason,
- the diagnostic tool cannot connect to the unit,
- the unit has suffered water damage or a voltage surge.
Before buying, it is worth measuring the ECU supply voltage and checking the connectors for corrosion.
Locked and unlocked options
Do you run a workshop with coding tools? Then a locked ECU will do – it comes with the previous car's data and immobiliser, for you to unlock, program and match yourself. Without that kind of equipment, it is better to order the unlocked version, which we prepare before dispatch, usually within 1–2 working days.
Whether PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning is possible depends on the number 03P906021K, the software and the immobiliser. Ask us before placing your order. All options: ECU preparation options.
Questions and answers
| I have a 03P906021K with a different Delphi number – is it the same ECU? |
|---|
| Not necessarily. Send us a photo of the label and we will check whether this unit with the number 28281647 is the right one. |
| Is the DCM3.7 a diesel ECU? |
| Yes, the Delphi DCM3.7 is a diesel engine control unit. |
| What condition is this ECU in? |
| It is a used part, fully working and in good condition. You will find the warranty period in the product specification table. |
Need help choosing an option? Send the numbers from the label to contact@auto24parts.com and we will tell you what is possible.
