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CarPort-OBD Wiki

Diagnostic solutions for VAG cars

The CarPort-OBD Wiki is the knowledge base for vehicle diagnostics with the CarPort-OBD software. Here we collect hands-on guides, coding and adaptations for cars from the VAG group – VW, Audi, Škoda and SEAT. Every article walks you through a specific function step by step. Pick a model and a function below to jump straight to the matching guide.

Model
Function

Battery adaptation

Audi A1 GBAudi A3 8VAudi Q2Audi Q3 F3Audi TT 8SSEAT AronaSEAT AtecaSEAT Ibiza KJSEAT Leon 5FSEAT TarracoŠkoda Fabia NJŠkoda KamiqŠkoda KaroqŠkoda KodiaqŠkoda Octavia 5EŠkoda ScalaŠkoda Superb 3VVW ArteonVW Golf 7VW Golf SportsvanVW Passat B8VW Polo 6VW T-CrossVW T-RocVW Tiguan ADVW Touran 5T

After replacing the battery, register the new battery on MQB vehicles via adaptation channel 10801 in CarPort (capacity, technology, manufacturer, serial number) so that energy management and start-stop work correctly.

After a battery replacement on an MQB vehicle, you should adapt (register) the new battery in the energy management. The control module records the battery’s capacity, technology and age, and adjusts the charge control as well as the start-stop function accordingly. If you don’t register the new battery, the vehicle keeps calculating with the old (aged) battery: the charging doesn’t match, the start-stop function doesn’t work reliably, and faults may be stored.

In CarPort, you do this on the diagnostic gateway (address 19) using the Adaptation function.

Adaptation channel 10801 “Battery adaptation” in CarPort

1. What you need beforehand

The values to be entered are printed on the label of the new battery. Read them off before you install the battery or before the label gets covered:

  • Nominal capacity in Ah (e.g. 69 Ah)
  • Battery technology (e.g. EFB or AGM – see Step 4)
  • Manufacturer (manufacturer code on the label, e.g. JCB)
  • Serial number of the battery (unique number on the label)

⚠️ The technology must match: Always enter the technology of the battery actually installed. A vehicle with start-stop needs an EFB or AGM battery – never install a simple flooded battery and never register it as one. Switching from AGM to EFB (or vice versa) is only permitted if the vehicle is approved for it.

2. Prerequisites

  • Diagnostic interface is connected (the status bar at the bottom shows e.g. “Connected with K+CAN. Adapter ready.”)
  • The new battery is already installed and connected
  • Ignition on, engine off
  • Stable vehicle voltage (connect a battery charger if necessary)

3. Opening the adaptation channel

  1. Select the control module 19 – Control module interface for data bus (Gateway).
  2. Switch to the Adaptation tab.
  3. In the Filter field, search for 10801 or Battery adaptation and select the channel 10801 Battery adaptation in the Active channel list.

Note: On some vehicles/software versions, the battery monitoring is located differently or the channel name varies slightly. The decisive one is the Battery adaptation channel.

4. Entering and saving the values

In the right-hand area you see the four parameters with Stored value and New value. Enter the data of the new battery in the New value column:

# Parameter Example (screenshot) Source
1 Battery nominal capacity 69 Ah Label
2 Battery technology EFB Label / battery type
3 Battery manufacturer JCB Label
4 Battery serial number 1111111111 Label

The values in the table are example values from the screenshot. The correct values depend on your battery and vehicle – always use the details from the label of the new battery.

Then click “Save changes…” at the top. CarPort writes the values to the control module and reads them back for confirmation.

💡 Note down the originally stored values beforehand (the Stored value column) in case you need them again later.

5. Battery technology – possible selection values

The battery technology drop-down offers, among others, the following values:

Value Meaning
Nass Conventional flooded battery (without start-stop)
Vlies Fleece battery
Wickel6V / Wickel12V Spiral-cell design (6 V / 12 V)
Ultracap Ultracapacitor
Gel Gel battery
Lithium-Ionen Lithium-ion battery
EFB Enhanced Flooded Battery – start-stop
Binär – AGM AGM (Absorbent Glass Mat) – start-stop, higher load capacity
EFB+ Reinforced EFB

For MQB vehicles with start-stop, EFB and AGM are the ones that matter in practice. Choose the value that matches the installed battery.

6. Checking the result

  1. Switch the ignition off and on again.
  2. Open channel 10801 again – the new values should now be shown as the Stored value.
  3. Check that no new fault is stored in the battery monitoring control module. Clear the fault memory if necessary.
  4. The start-stop function should be available again after a short drive, provided the charge level is sufficient.

7. Notes

  • Correct technology and capacity: Both values must match the installed battery. Incorrect entries lead to faulty charge control.
  • Battery with sensor: If the vehicle has a battery sensor (energy/battery management), adaptation after the replacement is practically always required. Without a sensor it is not mandatory, but recommended.
  • Unique serial number: Via the serial number, the vehicle recognizes the battery as “new” and restarts the aging calculation from scratch. All that matters is that the new value differs from the stored one.
  • No serial number on the label? If the new battery has no (usable) serial number, you can simply increase the stored value by 1 (e.g. …3456 → …3457). This ensures the number differs from the old one and the control module recognizes the battery as new.
  • Missing channels: Depending on the vehicle and coding, not all channels are visible – this is normal and not a fault.
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