Ensure you use the specific drivers provided with the 1.67 software package to avoid "Interface Communication Error." Opcom 1.67

: Improvements in speed and reliability are also notable with the 1.67 firmware. Users can expect faster communication with the vehicle's systems and more reliable data transmission.

: The device must have a real PIC18F458-I/PT chip. Many cheap clones use inferior chips that will be permanently damaged if you attempt to flash version 1.67 onto them.

If you have a genuine interface collecting dust, keep it. It’s great for older cars. But if you are looking to buy a new tool, skip the "1.67" listings on eBay. You are better off investing in a VXDIAG, MDI2 clone, or a high-quality ELM327/OBDLink for modern diagnostics.

Forced DPF regeneration to solve diesel issues.

It does not experience the same "not connected" or communication errors often reported with 1.99 firmware.

Confirm the installation if Windows prompts you with a security warning. Step 3: Configure the Software Launch your diagnostic software (e.g., VAUX-COM or OP-COM). Go to the or Configuration menu.

Turn the vehicle ignition key to position II (dash lights on, engine off). If the error persists, check your vehicle fuse box for a blown diagnostic port fuse (often shared with the cigarette lighter). Unexpected Firmware Downgrades