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 Honda Legend 37820-PL2-G12 37820PL2G12
Vendors's code: 37820PL2G12
Product code: 37820-PL2-G12
Barcode:
Code 39:
ISBN:
£154.16
Price
£154.16
£189.62
Price
£189.62
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Engine control unit Honda Legend 37820-PL2-G12 37820PL2G12
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from
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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 37820-PL2-G12 ECU fit your Honda Legend?
This is a used, working engine ECU marked 37820-PL2-G12 and CY-EH6915A. We always confirm the fit against the label. Ask us about preparation for fitting before you buy.
Engine control unit Honda Legend 37820-PL2-G12 37820PL2G12
This used 37820-PL2-G12 engine computer for the Honda Legend processes sensor signals and calculates the engine’s operating parameters.
Numbers to check
- 37820-PL2-G12 – Honda part number
- 37820PL2G12 – the same number without the dash
- CY-EH6915A – additional marking
Every character must match, including the final letters. If you are not sure, send us a photo of the label.
Typical fault symptoms
- 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 buying, check the ECU earths and wiring, as a damaged loom produces similar symptoms.
Preparation for fitting
A used engine ECU usually has to be programmed and matched to the car’s immobiliser.
Before ordering, ask us about the preparation options for the 37820-PL2-G12 unit and send us the numbers from the label of your ECU.
All variants are described on our Locked & Unlocked ECUs page.
Questions and answers
| What details should I send before ordering? |
|---|
| All the numbers from the label of your current ECU, or a clear photo of it. Based on that, we will check the fit and the possible variants. |
| 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 37820-PL2-G12 ECU is suitable. |
| 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. |
Need help choosing? Contact us at contact@auto24parts.com.
