What does code P1589 mean on BMW vehicles?
The ECU reports a failure during the knock control test pulse self-test for Bank 1.
OBD-II Code BMW
P1589 — BMW — Control Module Self Test, Knock Control Test Pulse Bank 1
The ECU reports a failure during the knock control test pulse self-test for Bank 1.
Common symptoms
- Limp mode activation
- reduced engine output
Possible causes
- Internal control module fault
- software malfunction
Initial recommendation
Perform advanced ECU diagnostics and verify knock control functionality.
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.
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