P1540
A/C System High Pressure
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Air conditioner doesn't work
- Reduced cooling efficiency
- Noise when the compressor is running
- Burning smell from the ventilation system
- Hot air from deflectors
Causes
- Recharging the system with refrigerant
- Pressure sensor malfunction
- Condenser clogged
- Air conditioning compressor malfunction
- Radiator fan problems
How to Fix
- Check refrigerant level
- Diagnose pressure sensor
- Clean or replace capacitor
- Check compressor operation
- Check the operation of the radiator fan