Audi P1649: Data Bus Powertrain Missing Message from ABS Control Module
Is your scanner showing Audi P1649?
No worries. We'll show you what it means and how to deal with it.
Audi P1649: Data Bus Powertrain Missing Message from ABS Control Module
OVERVIEWWhat Does The Audi P1649 Code Mean?
Ignition off, the ECU is missing general Data BUS information from the central electrical control. The Engine Control Module (ECM) communicates with all Data-Bus-capable control modules via a CAN Data-Bus. These Data-Bus-capable control modules are connected via two data bus wires which are twisted together (CAN_High and CAN_Low), and exchange information (messages).
Missing information on the Data-Bus is recognized as a malfunction and stored. Trouble-free operation of the CAN-bus requires that it have a terminal resistance. This central terminal resistor is located in the Engine Control Module (ECM).
What Are The Potential Causes Of The Audi P1649 Code?
Below are some potential causes of this DTC:
- Ground between engine and chassis may be broken
- Throttle position sensor may have failed
- Accelerator Pedal Position Sensor 2 has failed
- Throttle position sensor wiring may have shorted
- Faulty voltage supply
- Check the Terminal resistance for CAN-bus
- Data-Bus wires have short
- Data-Bus components are malfunctioning
- ECM has failed
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> Audi Throttle position sensor
>>> Hellla 010946011 Accelerator Pedal Sensor
>>> Audi Engine Control Module
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
