Sweet smell: likely causes and what to do
The most common reasons, how urgent each one is, and when to stop driving.
SAFETY FIRST
If the engine temperature gauge goes high, pull over and turn the engine off.
Likely causes
Coolant (antifreeze) leakMost likely
Fix soonHeater core leak (foggy windows)Maybe
Fix soonWhat to do
- Notice when it happens (speed, braking, turning, cold or warm engine). It helps the mechanic.
- The most likely cause is coolant (antifreeze) leak: “Fix soon”.
- If anything feels unsafe, slow down, pull over somewhere safe and call for help.
- Check for open recalls with your VIN at nhtsa.gov/recalls. Recall repairs are free at the dealer.
General help, not a diagnosis. A mechanic can tell you for sure. Costs in the app are rough estimates.