A/C Not Cold and Bad Smell in Traffic
The A/C cools well on the highway but loses cooling in traffic, accompanied by a bad smell. This indicates a potential issue with the A/C system's airflow or refrigerant, often related to a failing condenser fan, low refrigerant, or a dirty evaporator causing odor.
Diagnosis Details
Possible Causes
Condenser fan not working properly, reducing heat exchange at low speeds
Low refrigerant charge due to a slow leak
Dirty or moldy evaporator causing bad smell and reduced cooling
Faulty A/C compressor clutch or expansion valve
Related OBD-II Codes
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What You Should Do
Check condenser fan operation at idle; inspect for debris or electrical issues.
Have a professional check refrigerant pressure and look for leaks.
Clean or treat the evaporator to eliminate odor.
Replace cabin air filter if dirty.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
