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 Renault Dacia 8201082042 S120205101A
Vendors's code: 8201082042
Product code: S120205101A
Barcode:
Code 39:
ISBN:
€243.90
Price
€243.90
€300.00
Price
€300.00
Ask about the product
Engine control unit Renault Dacia 8201082042 S120205101A
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€30.00
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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 number 8201082042 on an engine control unit mean?
Engine control unit 8201082042, used and inspected. Compare the numbers with the original in your car.
Engine control unit 8201082042 for Renault Dacia: how to match it by part numbers?
If the engine will not start or the engine warning light is on, one possible cause is the control unit. Control unit 8201082042 for Renault Dacia is a used original part, inspected before sale. The listing does not state the car model or year, so we do not give them in the description and match the part by its numbers. The listing also gives the markings SIM32. They help tell the control unit versions apart, but the full part number is what decides compatibility.
Control unit numbers and markings
You will find the numbers on the label of the control unit, while catalogues list them as a single string:
- 8201082042, car manufacturer's original number,
- S120205101A, control unit manufacturer's number.
Check the numbers on your control unit and compare them with those above. If any of them differs, contact us before ordering.
Control unit variant
This listing is for a control unit in the following variant(s): Locked / Unlocked. 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.
Faults that call for checking the control unit
- the car loses power or goes into limp mode,
- fuel consumption rises for no obvious reason,
- faults appear and disappear, usually once the engine has warmed up,
- the engine no longer runs properly after the battery has gone flat.
First check the battery, fuses and wiring, because a faulty control unit has to be distinguished from an ordinary fault in the electrical system. Fitting and configuration are best left to a garage with suitable equipment.
Questions and answers
| Will the control unit work after fitting without programming? |
|---|
| That depends on the variant of the control unit and on the car. Before buying, send us the numbers from the label and we will confirm what is needed. |
| What do the markings SIM32 in the listing mean? |
| They are markings of the version or type of the control unit. They help tell the units apart, but the full part number is what decides compatibility. |
| How should I prepare for fitting the control unit? |
| Disconnect the battery, check the connector and the wiring, and after fitting read and clear the fault codes with a tester. Configuration is best carried out in a garage with suitable equipment. |
| What is the condition of this control unit? |
| It is an original recycled part in good condition, checked by us. Warranty details are in the product features table. |
Want to be certain? Send us the numbers from the housing of your control unit, and together we will check whether this part will fit.
