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 Volvo Continental 30788975 S180134001B
Vendors's code: 30788975
Product code: S180134001B
Barcode:
Code 39:
ISBN:
$187.15
Price
$187.15
$230.20
Price
$230.20
Ask about the product
Engine control unit Volvo Continental 30788975 S180134001B
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$30.69
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shipping
(Poland)
from
$30.69
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(Poland)
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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Will the 30788975 ECU fit your Volvo?
This is a used, working Continental engine ECU marked 30788975 and S180134001B. We always confirm the fit against the label. Sold in the locked version.
Engine control unit Volvo Continental 30788975 S180134001B
The Continental module 30788975 controls the engine – it reads sensor data and uses it to regulate the fuel system. It is a part for Volvo vehicles. We do not state a model or engine that the label does not confirm; the part numbers decide the fit.
Numbers on the label
- 30788975 – Volvo part number
- S180134001B – Continental number
- J38AC – additional marking
You will find the numbers on the casing of your current ECU. A similar-looking unit will not necessarily fit – the full number is what counts.
When the ECU may be faulty
- the engine will not start despite a good power and fuel supply,
- no communication with the ECU during diagnostics,
- limp mode with no sensor fault,
- damage after water ingress or a voltage spike.
Before replacing the ECU, check the power supply, earths and wiring loom – a damaged wire or connector can cause similar symptoms.
Locked version
We sell this ECU in the locked version only – with the previous car’s data and immobiliser. Before fitting, it has to be programmed and matched to the immobiliser at a garage.
Before ordering, send us the numbers from the label of your ECU – we will check whether the 30788975 unit is suitable.
All variants are described on our Locked & Unlocked ECUs page.
Questions and answers
| Can I fit an ECU with a different number suffix? |
|---|
| A different suffix can mean a different software or hardware version. Send us a photo of the label and we will check whether the 30788975 ECU is suitable. |
| Will the ECU start the engine straight after fitting? |
| No. The locked version needs programming and matching to the immobiliser. |
| What condition is the ECU in? |
| It is a used part, fully working and in good condition. The warranty period is shown in the product features table. |
Not sure which variant to choose? Email contact@auto24parts.com with the numbers from your label – we will check the available options.
