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.
Comfort control module Audi Volkswagen Skoda Seat Opel A1684LG
Vendors's code: A1684LG
Product code: A1684LG
Barcode:
Code 39:
ISBN:
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Part number A1684LG - is it the right choice?
Used, working part: comfort control module for Audi Volkswagen Skoda Seat Opel Ford Nissan - numbers A1684/LG / A1684LG. Before ordering, check the numbers on the label of the part removed from your car.
Comfort control module Audi Volkswagen Skoda Seat Opel Ford Nissan
Looking for a replacement for a faulty module for Audi Volkswagen Skoda Seat Opel Ford Nissan? We offer a used, working comfort control module in good condition.
Role of the part in the car
Which functions the module handles depends on the software and equipment of the car; the same physical module may work differently in another car.
In VAG group cars the module is sometimes described as the onboard power supply control unit (Bordnetzsteuergerät); its version depends on the equipment.
Typical failure symptoms
- fault messages appear after starting,
- locks and windows behave inconsistently,
- the module connector shows signs of corrosion,
- cabin illumination or signalling does not work.
Before buying, make sure the cause is not the power supply or wiring, and only then replace the module.
Compatibility with your car
Compare number A1684/LG in full with the number on your part. Different versions were fitted to the same models, so the number decides, not the model alone.
Numbers on the label
- A1684/LG / A1684LG - part number
Application according to the listing
- Audi Volkswagen Skoda Seat Opel Ford Nissan - model
Frequently asked questions
| What does "used, working" mean? |
|---|
| The part is used but working. The warranty is stated in the product features. |
| What condition is this part in? |
| We sell it as a used, working part in good condition; the warranty length is given in the offer features. |
| What condition is this part in? |
| This is a used, working part in good condition. You will find the warranty period in the product features table. |
Not sure? Write to contact@auto24parts.com and we will help you choose the right part for your car.