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Anthony, ASE Certified Technician
Category: Audi
Satisfied Customers: 11750
Experience:  ASE Master Automobile Technician with over 20 years exp. in this field.
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Mil CMD = Fail DTC4 Code read 02 And the coolant smell..vents

Resolved Question:

Mil CMD = Fail DTC4 Code read 02 And the coolant smell is coming through the vents.
Submitted: 5 years ago.
Category: Audi
Expert:  Anthony replied 5 years ago.

Hello Sir or Madam. Welcome to justanswer!


The 116 is for a bad thermostat in most cases. Id fix that first then clear the codes.


The 1505 is for a bad or mis adjusted throttle position sensor. That has to be set with a scan tool. Less than a half hour of work there.


The coolant smell is a leak somewhere most likely in the heater core.

Customer: replied 5 years ago.

Will the heater core problem solve everything. I thought it could have been a sensor.
Expert:  Anthony replied 5 years ago.

Id fix the coolant smell first and do the thermostat. You have three problems and need to solve all three. Solving one wont get rid of the other two.

Customer: replied 5 years ago.
The termo problem is the result of what?
Expert:  Anthony replied 5 years ago.
It not closing all the way and keeping the engine slightly cooler than it should be.
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