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Robert
Robert, UK Qualified Car Technician
Category: Car
Satisfied Customers: 5504
Experience:  Fully qualified / self employed garage technician in the UK
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Battery warning light showing and powder in engine bay, The

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Battery warning light showing and white powder in engine bay
JA: Just to clarify, what are the exact lights you're talking about?
Customer: The warning light in the dash
JA: What is the make/model/year of your car?
Customer: Toyota avensis 2 4d-cat auto
JA: What year is your Toyota?
Customer: 2011
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: No
JA: Is there anything else the Mechanic should know before I connect you? Rest assured that they'll be able to help you.
Customer: No

Im Rob, A UK certified vehicle technician and Garage/MOT centre owner, And will be assisting you with your question today.

In what vicinity is this white powder forming or around?

Customer: replied 5 days ago.
Its like talcum powder and it was on top of the engine all over the injectors inside the engine cover.
Customer: replied 5 days ago.
Its like talcum powder and it was on top of the engine all over the injectors inside the engine cover. Also i could smell burning electrical smell when i stopped.

Ok..have you noticed any coolant loss etc?

Customer: replied 5 days ago.
No coolant loss, car drives fine, i was guessing it could be the alternator or belt might need replacing, just curious as to where the fine white dust would come from.

If your battery light is on..then it likely your alternator isnt charging..so you'd need to make an inspection of seeing if the belt is still intact and then test the charging system with a suitable multimeter to see if its charging or not..normally you should have a 13.5-14v charge... refering to the white powder..that can either be one or two things coolant,dried antifreeze or aluminium corrosion from the cylinder head/cover..

Robert and 2 other Car Specialists are ready to help you
Customer: replied 5 days ago.
Ok thanks, ***** ***** give that a go now.

No problem..glad to help