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 1.8 TSI Bosch MED17.5 1Z0907115C 0261201794 1Z0907115B
Vendors's code: 0261201794
Product code: 1Z0907115C
Barcode:
Code 39:
ISBN:
£247.03
Price
£247.03
£303.84
Price
£303.84
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 1.8 TSI Bosch MED17.5 1Z0907115C 0261201794 1Z0907115B
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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 second number 1Z0907115B on the 1Z0907115C ECU mean?
This unit carries two VW numbers: 1Z0907115C and 1Z0907115B. Both refer to the same Bosch MED17.5 ECU from an Octavia 1.8 TSI – when matching, compare them with the label on your unit.
Engine Control Unit Skoda Octavia 1.8 TSI Bosch MED17.5 1Z0907115C 0261201794 1Z0907115B
In the Octavia 1.8 TSI, the direct-injection engine is managed by a Bosch ECU from the MED17.5 family – MED is the Motronic variant designed specifically for petrol direct-injection engines. This unit has VW number 1Z0907115C, an additional number 1Z0907115B and Bosch number 0261201794. It controls injection, ignition and boost. The unit is used, fully working and in good condition.
Numbers to compare
- 1Z0907115C – main VW/Skoda part number
- 1Z0907115B – second VW number visible on the unit
- 0261201794 – Bosch number, shown on the label as 0 261 201 794
- 1039S22977 – Bosch software number
The letter at the end of the VW number identifies the software or hardware version. If your ECU has either of the numbers 1Z0907115C or 1Z0907115B, also compare the Bosch number and the software number.
Symptoms of a faulty TSI ECU
- jerking and loss of power with no coil or injector fault codes,
- the engine will not start and the tester cannot see the ECU,
- fuel pressure or boost fault codes that persist after repair,
- limp mode with restricted revs.
First check the wiring loom at the unit and its power supply – a damaged wire causes similar symptoms.
Preparing the ECU – two routes
If you choose the unlocked version, you receive a unit that we have prepared before dispatch, which usually takes 1–2 working days. Before ordering, ask which method is possible: PIN / CAR PASS, Virgin, IMMO OFF, auto-programming or clone – this depends on the part number, software and immobiliser.
The locked version contains the immobiliser and data from the previous car. It is the option for garages that unlock, program and adapt ECUs themselves. Details: engine control unit variants.
Questions and answers
| Is 1Z0907115B a different ECU? |
|---|
| No, it is the second VW number on the same 1Z0907115C unit. |
| Is this unit a petrol ECU? |
| Yes. The Bosch number begins with 0 261, and MED17.5 is the Motronic family for petrol direct-injection engines. |
| What condition is the ECU in? |
| Used, fully working, in good condition. You will find the warranty period in the product specifications table. |
Not sure? Send a photo of the label to contact@auto24parts.com.
