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.
Refurbished engine control unit Virgin Opel Corsa 1.3 CDTI 55566037HJ
Vendors's code: MJD603SC
Product code: 79BD-51781
Barcode:
Code 39:
ISBN:
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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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Where to find number 55566037HJ on Opel engine control units?
Refurbished engine control unit, number 55566037HJ, inspected before sale. Compare the numbers with the original in your car.
What does number 55566037HJ mean on Opel engine control units?
This is a refurbished engine control unit for Opel Corsa. The main number is 55566037HJ, and whether the unit fits is decided by comparing all the numbers with the original part in your car. The listing indicates that the control unit was inspected before sale. The listing states that this control unit is for: Opel Corsa. Engine given in the listing: 1.3 CDTI.
Numbers to compare
You will find the numbers on the label of the control unit, while catalogues list them as a single string:
- 55566037 HJ (catalogue format: 55566037HJ), car manufacturer's original number.
Compare the numbers with the original control unit in your car, and if any of them differs, write to us before buying.
Control unit variant
This listing is for a control unit in the following variant(s): Refurbished - VIRGIN - CLEAR CAR PASS. We describe the differences between the variants (locked, unlocked, Virgin, IMMO OFF, Plug and Play, clone, full set) on the ECU preparation options page. Before buying, send us the numbers from the label and we will confirm which variant is available for that number.
The listing describes this control unit as refurbished, not new.
A control unit in the Virgin version is unlocked but not yet assigned to your car, so after fitting it requires programming or adaptation with suitable equipment.
What can point to an engine control unit failure
- the engine warning light comes on and does not go out,
- the diagnostic tester cannot connect to the control unit,
- the engine idles unevenly or stalls for no obvious reason,
- the engine starts and immediately stalls.
Before replacing the control unit, check the condition of the connector and the power supply wires. After fitting, the fault codes usually need to be cleared and, if necessary, the control unit programmed for the car.
Questions and answers
| Where do I find number 55566037HJ on my control unit? |
|---|
| The numbers are on a sticker or printed on the housing of the control unit. Take a close-up photo of the label in good light so that all the characters can be read. |
| Are the make and model of the car enough to choose the part? |
| No. A single model comes with different versions of the control unit, depending on the engine, the software version and the equipment. The most reliable reference is the number on the original control unit. |
| Can I send a photo for a compatibility check? |
| Yes. Contact us and send a photo of the label on the original control unit, and we will help you check whether this part will fit. |
| What is the condition of this control unit? |
| It is a refurbished control unit, checked by us, not a new part. Warranty details are in the product features table. |
If the numbers on your control unit differ from those given, write to us. We will check whether the right version is available in our range.