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 Volkswagen Passat 1.9 TDI Bosch 038906019A 0281001691
Vendors's code: 0281001691
Product code: 0281001691
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 Volkswagen Passat 1.9 TDI Bosch 038906019A 0281001691
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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 does the number 038906019A on a Passat 1.9 TDI ECU mean?
It is the Volkswagen part number, ending in a single letter A that indicates the module version. The same ECU has Bosch number 0281001691 (0 281 001 691).
Engine Control Unit Volkswagen Passat 1.9 TDI Bosch 038906019A 0281001691
The number 038906019A ends in just one letter, which is easy to overlook when comparing it with 038906019 modules that have two-letter suffixes. This unit from a Passat 1.9 TDI has Bosch number 0281001691 and controls the diesel engine – from the fuel quantity to boost control. When this module gives up, the engine usually will not start at all or goes straight into limp mode with noticeably reduced power.
Numbers to compare
- 038906019A – Volkswagen part number with a single letter A
- 0281001691 – Bosch number, shown on the label as 0 281 001 691
The letter at the end of the VW number denotes the software or hardware version. 038906019A and, for example, a 038906019 with a two-letter suffix are different modules, so compare the whole number character by character.
When the ECU may be to blame
- no start with a working pump and starter motor,
- the engine runs roughly or loses power with no sensor fault,
- no communication with the module during diagnostics,
- the effects of water ingress or a short circuit in the wiring.
Start by checking the power supply, earths and connector – replace the ECU only once these causes have been ruled out.
Choosing an option
Two options are available. Locked: with the data and immobiliser from the previous Passat, for workshops that unlock, program and adapt ECUs themselves. Unlocked: prepared by us before dispatch, usually within 1–2 working days.
Whether PIN / CAR PASS, Virgin, IMMO OFF, auto programming or clone will be possible depends on the part number, software and immobiliser. Check with us before you buy. Description of the options: ECU options page.
Questions and answers
| Will 038906019A replace an ECU with a two-letter suffix? |
|---|
| Do not assume so. It is a different version – send us a photo of the label and we will check. |
| Will the engine start after fitting the locked version? |
| No, it first has to be unlocked, programmed and adapted to the immobiliser. |
| What condition is this ECU in? |
| It is a used, fully working part in good condition. You will find the warranty period in the product features table. |
Questions about the number? Email contact@auto24parts.com.
