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 Octavia 1.6 TDI Continental 03L906023LQ 5WP42684AA 03L906023JH
Vendors's code: 5WP42684AA
Product code: 03L906023LQ
Barcode:
Code 39:
ISBN:
$368.84
Price
$368.84
$453.67
Price
$453.67
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 Octavia 1.6 TDI Continental 03L906023LQ 5WP42684AA 03L906023JH
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from
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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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How can I check whether the 03L906023LQ ECU will fit your Octavia?
Read the label on your unit and compare the VW number 03L906023LQ, including the LQ suffix. This used, fully working Continental ECU (5WP42684AA) comes from a 2011 Octavia 1.6 TDI.
Engine Control Unit Skoda Octavia 1.6 TDI Continental 03L906023LQ 5WP42684AA 03L906023JH
This unit comes from a 2011 Skoda Octavia 1.6 TDI. The Continental 03L906023LQ engine control unit manages the diesel engine – it calculates the fuel quantity, regulates turbo boost and checks immobiliser authorisation when the engine is started.
How to identify this ECU
- 03L906023LQ – VW/Skoda number of the complete ECU,
- 03L906023JH – second VW number shown on the label,
- 5WP42684AA – Continental number (as written on the label: 5WP42684 AA).
Judge compatibility by the number 03L906023LQ. The second number, 03L906023JH, also appears on units with a different main number, so it is not enough for matching.
When should you suspect the ECU?
- the engine cuts out shortly after starting or will not fire at all,
- the diagnostic tool will not connect to the engine control unit,
- faults are stored in the memory that cannot be cleared,
- the unit has been exposed to moisture or a voltage surge.
Before replacing it, measure the supply voltage and check that the immobiliser recognises the key correctly.
Workshop version or prepared by us?
The unlocked version is an ECU that we prepare before dispatch – usually within 1–2 working days. The locked version keeps the data and immobiliser of the car it came from; it is bought mainly by workshops that unlock, program and match it themselves.
Which preparation method will be possible – PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning – depends on the part number, software and immobiliser. For 03L906023LQ we will confirm this when you ask. More: ECU preparation options.
Questions and answers
| Does this unit fit an Octavia from a model year other than 2011? |
|---|
| The year is only a guide – the VW number on the label is what decides. If it is the same, the ECU is a good candidate; if in doubt, get in touch. |
| What is the number 5WP42684AA? |
| It is the number assigned by Continental. Together with the VW number, it identifies the unit unambiguously. |
| Condition and warranty? |
| The ECU is used, fully working and in good condition. You will find the warranty period in the product specification table. |
Have a photo of the label? Send it to contact@auto24parts.com – we will check compatibility.
