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 AVU Siemens Simos 3.3A 06A906033K 5WP4003904
Vendors's code: 5WP4003904
Product code: 06A906033K
Barcode:
Code 39:
ISBN:
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 AVU Siemens Simos 3.3A 06A906033K 5WP4003904
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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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Does the 06A906033K ECU fit an Octavia 1.6 AVU?
This unit comes from an Octavia 1.6 with the AVU engine, but ultimately the label decides: VW number 06A906033K and Siemens number 5WP40039 04. The Simos 3.3A ECU is used and fully working.
Engine Control Unit Skoda Octavia 1.6 AVU Siemens Simos 3.3A 06A906033K 5WP4003904
Simos is a family of Siemens petrol engine ECUs, and this unit, a Simos 3.3A, comes from an Octavia 1.6 with engine code AVU. The unit is responsible for injection, ignition and idle. Siemens number 5WP4003904 belongs to the Siemens VDO / Continental numbering system, and the Skoda/VW part number is 06A906033K. The ECU is used, fully working and in good condition.
Numbers to compare
- 06A906033K – VW/Skoda part number, version "K"
- 5WP4003904 – Siemens number, shown on the label as 5WP40039 04
- Simos 3.3A – ECU type
- AVU – 1.6 engine code
The single letter "K" after the VW number also denotes a specific version – 06A906033 ECUs with other suffixes have different software or hardware.
Symptoms of a fault
- the engine starts and immediately cuts out,
- uneven idle speed with no throttle body fault,
- no communication with the unit,
- sudden loss of spark on all cylinders.
Start by checking the fuses and the ECU power supply relay.
Locked or unlocked ECU
Before buying the unlocked version, ask us which method can be used – PIN / CAR PASS, Virgin, IMMO OFF, auto-programming or clone depend on the part number, software and immobiliser. We carry out the preparation before dispatch, usually within 1–2 working days.
The locked version carries the data and immobiliser of the previous car. It is for garages that will unlock, program and adapt the unit themselves. More: engine control unit variants.
Questions and answers
| Will an ECU for the AVU engine work with another 1.6 engine? |
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| Do not assume so. Compare the number 06A906033K and the Siemens number with the label on your unit. |
| What does Simos 3.3A mean? |
| It is the type designation of a Siemens ECU from the Simos family for petrol engines. |
| What condition is the unit in? |
| Used, fully working, in good condition. You will find the warranty period in the product specifications table. |
Questions about the 06A906033K ECU? Email contact@auto24parts.com.
