What does code P1643 mean on Jaguar vehicles?
The ECU detects a communication failure between the ECM and the transmission control module.
OBD-II Code Jaguar
P1643 — Jaguar — CAN Data Bus ECM TCM Network Malfunction
The ECU detects a communication failure between the ECM and the transmission control module.
Common symptoms
- Erratic shifting behavior
Possible causes
- CAN network communication fault
Initial recommendation
Inspect CAN network communication between ECM and TCM.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
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