What does code P1542 mean?

Q: What does code P1542 mean?

A/C System High Pressure High Temperature. P1542 on Chrysler vehicles means the powertrain control module has detected an abnormally high pressure and temperature in the air conditioning system, usually signaled by the A/C pressure transducer or the high-pressure switch. The computer sets this code when the refrigerant pressure exceeds a safe threshold for a set time, often because the cooling fans are not running or the system is overcharged.

DTC codes / Chrysler codes / P1542

P1542 · ChryslerA/C System High Pressure High Temperature

P1542 on Chrysler vehicles means the powertrain control module has detected an abnormally high pressure and temperature in the air conditioning system, usually signaled by the A/C pressure transducer or the high-pressure switch. The computer sets this code when the refrigerant pressure exceeds a safe threshold for a set time, often because the cooling fans are not running or the system is overcharged.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.