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  #1  
Old 03-27-2020, 08:33 AM
nmcaskill nmcaskill is offline
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Mein Auto: 335I, Z4, K1200RS
Amber tire, brake and DTC lights on?

My tire pressure low, brake and DTC lights on my 06 z4 3.0 si roadster remain on. Tire pressure is good and car runs great. System will not reset. Anyone seen this before
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Old 03-27-2020, 05:29 PM
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Clearancediver Clearancediver is offline
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Mein Auto: 2004 Z4, 2009 Nomad mc
Z4 trifecta..... https://www.bimmerfest.com/forums/sh.../topics/958051

Google that and Z4 low voltage issues...

Low voltage will cause this.... battery... alternator output/voltage regulator... among leading culprits. Check these first before anything else...

Make sure you google automotive battery voltage readings to ensure you understand how to fault find standing/cold battery voltage and alternator voltage when vehicle is running.

Codes need to be cleared with BMW software or OBEDII readers capable of reading BMW proprietary codes.


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Old 03-29-2020, 12:10 PM
Tom Broderick Tom Broderick is offline
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I have a bad brake sensor number one. Found one at the junkyard for 3 dollars, installed it and no more lights.
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Old 03-29-2020, 12:28 PM
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Clearancediver Clearancediver is offline
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Eliminating an electrical issue in fault diagnosing should always be done first. Usually costs nothing to do so... a voltage reader that you can plug into the cigarette lighter costs just a few bucks on eBay.... and allows you to monitor voltage in real time even while driving (use an observer).

While it may end up being a pressure sensor, you have validated the health and strength of your battery and that of your voltage regulator for a messily +\- $2 and potentially saved yourself from issues later on...

The car is sensitive to low voltage...


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