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 Superb 1.6 TDI Continental 03L906023JJ 5WP42678AA 03L906023JH
Vendors's code: 5WP42678AA
Product code: 5WP42678AA
Barcode:
Code 39:
ISBN:
£277.90
Price
£277.90
£341.82
Price
£341.82
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 Superb 1.6 TDI Continental 03L906023JJ 5WP42678AA 03L906023JH
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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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What is the difference between 03L906023JJ and 03L906023JH on the label?
The label on this ECU shows two VW numbers. 03L906023JJ is the one used for matching, while 03L906023JH is a second number that also appears on other units. This Continental 5WP42678AA unit comes from a 2010 Skoda Superb 1.6 TDI.
Engine Control Unit Skoda Superb 1.6 TDI Continental 03L906023JJ 5WP42678AA 03L906023JH
Continental, formerly Siemens VDO, marks its ECUs with 5WP numbers – this one is 5WP42678AA. In the 2010 Skoda Superb 1.6 TDI, the 03L906023JJ unit managed the diesel engine: fuel quantity, turbo boost and starting. When the engine is started, it also checks that the immobiliser has recognised the key.
Numbers to compare
- 03L906023JJ – main VW/Skoda part number,
- 03L906023JH – second VW number from the label,
- 5WP42678AA – Continental number, as written on the label: 5WP42678 AA.
You will find the same second number JH on some ECUs from the Octavia 1.6 TDI, but with a different main number. So compare 03L906023JJ, not just JH.
Fault symptoms
- the engine is hard to start or will not start at all,
- loss of power and limp mode,
- internal ECU faults stored,
- the unit does not respond to the diagnostic tool.
Before replacing the ECU, check the wiring loom, connectors and power supply – it is quicker and cheaper than replacing the unit. Reading the fault memory will also tell you a lot.
Preparation method
You can buy this ECU locked – with the immobiliser and data of the Superb it came from – if your workshop unlocks, programs and matches units itself. Alternatively, choose 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 can be used depends on the part number, software and immobiliser. For 03L906023JJ we will check this before you buy. All options are described here: ECU preparation options.
Questions and answers
| Does the ECU from a Superb fit an Octavia 1.6 TDI? |
|---|
| Only if the main number is the same. The shared number 03L906023JH is not enough. |
| What does 5WP42678 AA mean? |
| It is the manufacturer number – Continental. The space before AA is just the way it is written on the label. |
| What condition is it in? |
| Used, fully working and in good condition. You will find the warranty period in the product specification table. |
Contact us about compatibility: contact@auto24parts.com.
