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Matt
Matt, Mechanical Engineer
Category: BMW
Satisfied Customers: 109
Experience:  BEng hons Mech engineering, in auto industry 22 years
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My bmw x3 57 wont start,cold start engine thermometer needle

Customer Question

my bmw x3 57 wont start,cold start engine thermometer needle upover red,by playing around with key,switching on off needle might drop car starts runs for a few seconds thermo needle jumps to red,engine stops. please help.
Submitted: 1 month ago.
Category: BMW
Expert:  Greg replied 1 month ago.
Can you get hooked up to a diagnostic scan tool.
You may find you have a bad engine coolant temp sensor .
Or a bad wiring engine harness ,
If the ECU see a high temp reading the fuel air mix will be out of specs and will not start.
Greg