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 Bosch 021906258AF 0261203116
Vendors's code: 0261203116
Product code: 0261203116
Barcode:
Code 39:
ISBN:
£370.74
Price
£370.74
£456.01
Price
£456.01
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Engine Control Unit Volkswagen Bosch 021906258AF 0261203116
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What does 0261203116/117 mean on the 021906258AF ECU?
It is a shortened form of two Bosch numbers: 0261203116 and 0261203117 – both appear on this petrol engine control unit. The VW number is 021906258AF; the unit is used and in working order.
Engine Control Unit Volkswagen Bosch 021906258AF 0261203116
This Bosch unit carries no fewer than three numbers: the VW number 021906258AF and two Bosch numbers, 0261203116 and 0261203117. The 0 261 series denotes a petrol engine control unit – the module controls injection and ignition based on sensor readings. It comes from a Volkswagen and is in working order and in good condition.
Numbers to compare
- 021906258AF – Volkswagen part number
- 0261203116 – Bosch number, shown on the label as 0 261 203 116
- 0261203117 – second Bosch number, abbreviated as “/117”
A VW number in the format 0xx 906 xxx indicates an engine control unit. The final letters (here AF) define the software or hardware version, so pay particular attention to them. If your label shows only one of the Bosch numbers, send us a photo of it.
Symptoms of a faulty petrol ECU
- no spark or no injection even though the coils and injectors are fine,
- rough running and jerking with no sensor fault,
- engine warning light on and internal unit faults,
- no connection with the tester.
Before replacing the unit, measure the supply voltage and check the earths – a poor contact can mimic an ECU failure.
ECU preparation status
We sell the 021906258AF ECU with no variants to choose from. Before purchase we confirm how it is prepared and what needs to be done after fitting.
You will find a description of the possible ECU preparation methods on the ECU preparation options page.
Questions and answers
| Which Bosch number is correct: 116 or 117? |
|---|
| Both appear on this unit. Compare both the Bosch number and the VW number 021906258AF with the label on your ECU. |
| Is this an ECU for a petrol engine? |
| Yes, the Bosch 0 261 number series indicates this. |
| What needs to be done after fitting? |
| We agree this before purchase, depending on the car and the condition of the unit. |
| What condition is it in? |
| Used, in working order, in good condition. You will find the warranty period in the product features table. |
Send any questions about this unit to contact@auto24parts.com – ideally together with a photo of the label.
