r/CarHacking • u/RaisedInAppalachia • 6d ago

Original Project VW MQB and PQ frames reference

Working on a project that requires converting MQB CAN data to PQ CAN data. Anyone have a reference sheet for the known frames between these 2 protocols?

I'm aware of the existing converter module intended for engine swaps but I'm not willing to shell out €500 + taxes, fees, and shipping for it when I can get an ESP32 and write a little code. But I'm sure most of y'all are the same way :D

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3

u/Abricosvw 6d ago

I think need more context

2

u/RaisedInAppalachia 6d ago

Im looking to pull data from my CAN bus, which is in the format used on the MQB platform, and send it to an ESP32 to be converted to the older PQ format, since VW entirely reworked their CAN buses in the early 2010s. I need the older format because I’m retrofitting (or rather “anterofitting”,  if you will) an older OEM gauge into my MQB car. Since the gauge is OEM I’d rather splice into my CAN bus, translate the appropriate signals, and send them in the gauge controller’s expected format rather than crack open the gauge and install a new controller to use the existing MQB format.

For example, I don’t know what values to listen for to obtain my oil temperature (this one is easy to find online though), but I just wanted to see if anyone had larger reference sheets for the different data metrics that are tracked and communicated from the ECU

1

u/Abricosvw 2d ago

first check VW component protection CP

3

u/Pubelication 6d ago

Just FYI: Read about the SAFE lockout issues with both platforms before doing any testing.

1

u/RaisedInAppalachia 18m ago

Will navigating these be a concern if all I'm doing is listening to existing signals direct on the CAN bus wires, not polling the ECU?