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 Accord 37820-PDC-E51 37820PDCE51
Vendors's code: 37820PDCE51
Product code: 37820-PDC-E51
Barcode:
Code 39:
ISBN:
€101.63
Price
€101.63
€125.00
Price
€125.00
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Engine control unit Honda Accord 37820-PDC-E51 37820PDCE51
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37820-PDC-E51 engine ECU for your Honda Accord – how to check the fit
A working, used ECU with numbers 37820-PDC-E51 and 582916-9706. Compare them with the label of your own unit; we agree the unlocking method before purchase.
Engine control unit Honda Accord 37820-PDC-E51 37820PDCE51
The 37820-PDC-E51 engine ECU is a unit fitted to the Honda Accord. Using signals from the sensors, it manages the engine, including fuel quantity and injection timing.
Numbers to check
- 37820-PDC-E51 – Honda part number
- 37820PDCE51 – the same number without the dash
- 582916-9706 – additional marking
Every character must match, including the final letters. If you are not sure, send us a photo of the label.
When the ECU may be faulty
- the starter cranks but the engine does not fire,
- the diagnostic tool cannot connect to the ECU,
- an engine warning light and fault codes that remain after replacing sensors,
- signs of moisture or corrosion on the connectors or circuit board.
Before replacing the ECU, check the power supply, earths and wiring loom – a damaged wire or connector can cause similar symptoms.
Locked or unlocked version?
There are two variants: locked, with the previous vehicle’s data and immobiliser, for garages, and unlocked, which we prepare before dispatch.
Not every unlocking method is possible for every ECU – it depends on the number, the software and the car’s immobiliser. Before ordering the unlocked version, ask us about the options for the 37820-PDC-E51 ECU.
All variants are described on our Locked & Unlocked ECUs page.
Frequently asked questions
| Will the ECU start the engine straight after fitting? |
|---|
| The locked version will not – it needs programming and matching to the immobiliser. With the unlocked version it depends on the preparation method, which we agree before purchase. |
| 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-PDC-E51 ECU is suitable. |
Need help choosing? Contact us at contact@auto24parts.com.
