Software module for working with the engine control unit Gen2 of FCA petrol cars.
Module for working with FCA group (Chrysler/Dodge/Jeep/Fiat) cars through the diagnostic connector with Continental GPEC2 LOCKED, GPEC2A, GPEC3 control units.
These units are installed on petrol cars of the mentioned brands and since 2013 have internal protection (LOCK) against tuning.
Successful writing requires mandatory removal of protection (ECU Unlock) in BSL mode, for which it is necessary to disassemble the unit and connect it "on the table" according to the instructions.
The module allows the following operations:
- Identification and obtaining protection status (LOCKED/UNLOCKED)
- Reading FULLFLASH via OBD2
- Reading EEPROM via OBD2
- Removing ECU Unlock protection in BSL mode
- Writing calibration area via OBD2
- Writing EEPROM via OBD2
- Reading and clearing DTC errors
Which cars and control units does the Bitbox FCA Petrol Gen2 CAN module support:
FIDs: 18, 19, 20, 21
- Continental GPEC2 2013+ MPC5566 3Mb (FID: 20)
- Continental GPEC2 2015+ MPC5566 3Mb (FID: 21)
- Continental GPEC2A MPC5674 4Mb (FID: 19)
- Continental GPEC2A 2018+ MPC5674 4Mb (FID: 131)
- Continental GPEC3 MPC5674 4Mb (FID: 18)
Attention! The protection removal procedure does not work with all J2534 adapters. Currently, Scanmatik SM2, Scanmatik SM2-PRO, CarDAQ Plus, Bosch VCM2, Mongoose (excluding ISO) have been tested and guaranteed to work.
Does not work with Tactrix OpenPort 2.0, Chipsoft J2534, SMS-Soft Dialink.
The module requires the purchase of a USB protection key Bitbox. The key can be purchased in our store. An unlimited number of modules can be purchased for one key.
Module activation is performed within 1 hour on business days (usually 10-15 minutes). Activation may be delayed on weekends and holidays (up to 2 hours).
Only the serial number of the key and email are required to activate the module.
To connect the control unit on the table, additional equipment needs to be purchased, any of the following:
Powerbox and Combibox for PCMflash are fully compatible with Bitbox.
1. No Refunds or Modifications for Digital Licenses
Activated modules or licenses cannot be returned or refunded.
If an incorrect key or device number is entered by the customer, the purchase is not eligible for return.
Licenses cannot be modified, transferred, or reissued for another device under any circumstances.
2. Irreversible Order Processing
After the order status changes to “Waiting for activation”, the data has already been sent to the developer.
From this point onward, the order cannot be canceled, edited, corrected, or refunded.
3. Responsibility for Software Functionality
Our store is not responsible for the functionality, performance, or declared features of any software module.
We do not guarantee the listed functions because we are not the developer.
4. Accuracy of Product Information
Module and script descriptions are provided directly by the manufacturer.
IOBD.io is not responsible for any inaccuracies, missing details, or differences between the description and actual operation.
In disputed situations regarding functionality or listed features, the customer must contact the manufacturer.
5. Customer Responsibility for Installation
IOBD.io sells professional automotive diagnostic software and equipment.
Installation, setup, configuration, and compatibility checks must be performed by the customer.
We do not provide remote installation, programming, or setup services unless explicitly stated otherwise.
6. Required Technical Knowledge
These products are intended for users with basic technical knowledge in automotive diagnostics.
The customer is fully responsible for understanding the installation process and using the software and hardware correctly.
7. No Liability for Incorrect Usage
IOBD.IO is not responsible for issues caused by:
incorrect installation
unsupported or incompatible hardware
improper configuration
third-party interference
Important:
This function is available only on certain BMW engines and is NOT applicable to other vehicle brands.
The information below applies only to stock engines with factory ECU software and a standard exhaust system.
What This Parameter Actually Represents
This is NOT a direct measurement of fuel octane and is NOT a direct octane reading calculated by the ECU.
The value is an adaptation factor ranging from 0 to 1, where:
- 0 = no correction
- 1 = maximum correction
According to BMW’s internal definition:
Faktor adaptierte Kraftstoffqualität (0 = ROZ98 / 1.0 = ROZ91)
- 0 corresponds to 98 ROZ
- 1.0 corresponds to 91 ROZ
ROZ is the German equivalent of RON (Research Octane Number).
The device converts this multiplier into a more intuitive octane value for user convenience.
⚠️ The device does not measure anything itself.
It only displays the data provided by the engine control unit (ECU).
How the ECU Evaluates Fuel Quality
Each ECU has different calibration sensitivity:
- Sensitivity to the adaptation factor
- Sensitivity of the knock control system
Fuel quality is evaluated subjectively by the ECU, primarily based on:
- Knock ignition timing corrections
- Overall engine noise levels
BMW G-Series & LCI F-Series (B-Engines)
B38 / N63 / S63 / N74
These engines are highly sensitive to octane adaptation.
- During warm-up and cruising, the displayed octane may frequently drop to 95 or lower.
- This does NOT automatically indicate poor fuel quality.
- Under load, the value should increase.
⚠️ If the value continues to decrease under load, this may indicate a problem.
B46 / B48 / B58
These engines have low sensitivity.
- During cruising, octane will typically display maximum values even with mediocre fuel.
- Under load, the value will decrease if fuel quality is truly poor.
S58
Octane correction is virtually inactive.
- It will typically always show 98.
- If it drops below 98, fuel quality is genuinely very poor.
BMW F-Series (Pre-LCI) with N/S Engines
Most pre-LCI F-series ECUs do not calculate octane adaptation.
Do not expect this parameter to function.
S55
- Octane parameter not used by the system
- Display not supported
- However, display of the last 5 refueling quality events is supported
S63
- Octane parameter not used
- Display not supported
- Refueling quality display not supported
BMW E-Series
Octane parameter not available. Display not supported.
Important Notes About Tuned Vehicles
With modified hardware or custom tuning, behavior may vary significantly. Always consult your tuner regarding expected operation.
Key principles:
- If octane drops under load, it means fuel quality is worse than expected under those conditions.
- This does NOT automatically mean the fuel itself is bad.
Examples:
- If a tuner increases ignition timing and boost pressure, even good fuel may cause knock corrections, and the ECU may interpret it as poor fuel.
- Thin-walled or poorly mounted exhaust systems may create parasitic noise, which the ECU may interpret as engine knock, causing negative correction.
- Conversely, if knock sensitivity is reduced or octane correction is disabled in tuning, readings may appear ideal while actual engine safety is compromised.