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 Toyota 8966135A30 2750007931
Vendors's code: 2750007931
Product code: 8966135A30
Barcode:
Code 39:
ISBN:
€203.25
Price
€203.25
€250.00
Price
€250.00
Ask about the product
Engine control unit Toyota 8966135A30 2750007931
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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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Is engine control unit 8966135A30 a used original part?
Used original engine control unit, number 8966135A30, inspected before sale. Matched by the numbers in the listing.
Is engine control unit 8966135A30 the right part for your Toyota?
This is a used original engine control unit for Toyota. It manages engine operation based on signals from sensors. The main number is 8966135A30, and the other numbers from the listing are given below. 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.
Where to find the numbers on an engine control unit
Below are the numbers as they appear in the listing, together with the single-string form used in catalogues:
- 8966135A30, car manufacturer's original number,
- 2750007931, control unit manufacturer's number.
Matching by number is more reliable than matching by car model. Compare all the numbers and ask us if any of them does not match.
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.
What can point to an engine control unit failure
- the engine will not start although the starter motor works and there is fuel,
- the engine warning light comes on and does not go out,
- the engine starts and immediately stalls,
- the radiator fan or other electrical components do not work properly.
Before buying a control unit, read the fault codes with a diagnostic tester and check the power supply, the earth connections and the connector. Damaged sensors, wiring or fuses can cause similar symptoms, and in that case replacing the control unit will not help.
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. |
| Does a lit engine warning light always mean a faulty control unit? |
| No. Read the fault codes first, because the cause may be a sensor, the wiring or the power supply. |
| 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 condition is this control unit in? |
| It is a used original part, inspected before sale. You will find the warranty period 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.
