Opcom 167 Firmware Work -
Before erasing, I used pickit3 command line to dump the existing memory:
pk3cmd -P18F2580 -G -Ooriginal_firmware.hex
Keep this safe. If you lose the bootloader sector, the PC will never recognize the USB interface again.
To prevent Windows from suspending the Opcom:
Surprisingly, Opcom 1.45 firmware (latest) may fail on 1990s KWP2000 cars (Vectra B, Calibra). Workaround:
If your Opcom 167 is currently working, don't fix what isn't broken. The soldering risk is real; these PCBs have thin traces that lift easily.
However, if you have a bricked unit or you are experiencing the dreaded "No Communication with Interface" error, the firmware work is the only cure. Just remember: You aren't just updating software; you are rewriting the soul of the device.
Pro Tip: After flashing, use the official Opcom 167.001 driver (not the generic CDC driver). Force the INF file via "Have Disk" in Device Manager to get the latency timer down to 1ms.
Have you attempted a PIC flash on your Opcom? Did you use the bootloader method or direct programming? Let me know in the comments below.
Disclaimer: Modifying firmware on clone devices voids any warranty and may violate software licensing agreements. This post is for educational purposes regarding hardware recovery.
OP-COM firmware 1.67 is widely considered the latest official stable firmware version for the diagnostic interface. It is the go-to choice for users who need deep diagnostics and coding capabilities for Opel and Vauxhall vehicles up to roughly 2016–2021 models. 🛠️ Key Capabilities
Firmware 1.67 transforms the interface into a professional-grade tool:
Full System Access: Scans all ECUs including Engine, ABS, SRS (Airbags), and Climate Control.
Coding & Personalization: Activates "hidden" functions like cruise control, xenon headlights, and parking sensors. opcom 167 firmware work
Key Programming: Supports adding/deleting ignition keys and immobilizer synchronization.
Real-time Monitoring: Provides live data streams (RPM, sensors, temperature) for advanced troubleshooting. ⚠️ The "Fake" Firmware Warning
The market is flooded with clones labeled with higher version numbers like 1.70, 1.95, or 1.99.
The Reality: These are almost always "fake" version numbers.
The Risk: These versions are often just older 1.37 or 1.41 firmware with a modified label. They frequently lack the ability to be reflashed and may not communicate with all modules on newer cars.
Hardware Check: Reliable 1.67 firmware typically requires a high-quality PCB with a PIC18F458 chip. Clones using the cheaper PIC18F45K80 chip often fail or "brick" if you attempt to update them. OpCom software issue - Vauxhall Owners Network Forum
When discussing the OP-COM 1.67 firmware, it is important to distinguish between original hardware and common aftermarket clones. Version 1.67 is frequently found on Chinese clone interfaces (often labeled as "V5") and is generally considered a stable, "fake" firmware version designed to work with specific software cracked for those devices. Key Performance Details
Stability: Firmware 1.67 is often more stable than earlier versions (like 1.45 or 1.59) for communicating with newer Opel/Vauxhall models up to roughly 2014–2016, depending on the software used.
Chip Compatibility: This firmware usually runs on the PIC18F458 microcontroller. If your device uses a "fake" chip (marked as OP-COM but not a genuine Microchip PIC), attempting to flash or "downgrade" the firmware will likely brick the device.
Software Pairing: It works best with Vaux-Com 120309a or the 2014 Professional software. Using it with newer, original software versions can cause the interface to be disabled by the software's protection mechanisms. Troubleshooting "Does it work?" If you are having trouble getting a 1.67 unit to function:
Driver Check: Ensure the FTDI drivers are correctly installed in Windows Device Manager. The device should appear under "Universal Serial Bus controllers" as "USB Serial Converter."
Interface Test: In your OP-COM software, go to Settings > Test Interface. If it says "Interface not found," it is usually a driver or USB cable issue. If it says "Firmware 1.67," the hardware is communicating correctly. Before erasing, I used pickit3 command line to
Protocol Issues: If it connects to the car but won't talk to specific modules (like the ECU or ABS), the issue is often the relays inside the device failing to switch, rather than the firmware itself.
Warning: Avoid using "Firmware Update" tools found online unless you are 100% certain your device has a genuine PIC18F458 chip.
Are you trying to install drivers for this specific version, or are you having trouble connecting it to a specific car model?
OP-COM 1.67 firmware is widely considered the most stable "final" version for genuine PIC18F458-based diagnostic interfaces, supporting Opel/Vauxhall vehicles from 1987 to 2016
. Unlike later versions (like 1.99), which are often locked Chinese clones, version 1.67 is preferred for its ability to be safely flashed and its compatibility with professional software like OP-COM 2016 Hidplanet.lv Key Compatibility & Hardware Requirements : The firmware only works reliably on interfaces with a genuine PIC18F458
microcontroller. High-quality "Version 5" boards are the industry standard for this firmware. Operating Systems : Compatible with Windows XP, 7, 8, and 10 . On Windows 10/11 64-bit, you must disable digital signature enforcement to install the required FTDI drivers. Driver Version : For stable communication, use FTDI driver version 2.10.0.0 or older
(e.g., 2.8.30.0). Newer drivers can cause connection failures or "not connected to ECU" errors. Hidplanet.lv How to Make Firmware 1.67 Work
To ensure your 1.67 interface functions correctly, follow these steps: Driver Setup
: Check Device Manager to ensure your interface is recognized as a "USB Serial Converter" with the correct PID (usually 6001 or 4F50) Interface Test : Run your diagnostic software (e.g., VAUX-COM) as Administrator . Go to "Settings" and click "Test Interface"
. If successful, it should display "Firmware version: V01.67". Vehicle Connection
: Ensure the cable is plugged into the vehicle's OBD port before attempting to communicate with specific modules (like the Engine or ABS) to avoid "ECU not responding" errors. Firmware Restoration : If the interface becomes unresponsive, use the tool to reload the 1.67 firmware. When flashing, select "With bootloader recover" if the firmware version is 1.41 or higher. Why Choose 1.67 over 1.99? Functionality : 1.67 can access specific modules (like REC, EHU, or DIS
) and perform programming tasks (e.g., cruise control activation) that 1.99 often fails to open. Reliability Keep this safe
: Version 1.99 is frequently a "fake" firmware label applied to non-upgradable hardware, leading to instability or failed connections with newer CAN-BUS models. or help identifying if your hardware chip is genuine? OP-COM 1.67 cable for diagnostics and coding Opel 1987-2016
OPCOM 167 Firmware: The Definitive Guide to Functionality, Compatibility, and Troubleshooting
The name "OPCOM" is legendary in the Vauxhall and Opel tuning community. For over a decade, this interface has been the go-to tool for DIY mechanics looking to diagnose, program, and tweak their vehicles without paying dealership prices. However, not all OPCOM interfaces are created equal.
Among the various hardware versions available, the OPCOM 167 firmware stands out as a significant marker in the evolution of the clone market. It represents the "sweet spot" for many users—balancing modern vehicle support with older architecture compatibility.
This article provides a comprehensive overview of what OP-COM 167 firmware is, how it works, what vehicles it supports, and the common issues users face.
After any firmware work, you must validate functionality.
Subject: Opcom 167 Firmware – In-Depth Review & Work Performance
"v167 saved my Astra H – coded injectors, reset airbag, and ran DPF regen in one afternoon. No issues."
"Failed to read UCH on 2013 Insignia. Switched to v1.45 – same result. It's a car limitation, not firmware."
"Flashed v167 over v1.39. Much faster on CAN bus, but lost ability to read some 1999 models."
Open Device Manager → Ports (COM & LPT). A genuine Opcom 167 shows as "FTDI FT232R USB UART." Check the PCB: look for a large PIC18F2480 or PIC18F2580 chip. If you see a PIC18F25K80, you have a newer variant. Never mix firmware across different PIC families.