P0539
A/C Evaporator Temperature Circuit Intermittent
Generic code
Vehicle Speed and Idle Control System
Low severity
Hard repair
Free on OBD DashX
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What P0539 means
- The fault code P0539 indicates that there is an intermittent issue with the circuit that controls the A/C refrigerant pressure sensor. This may cause the A/C system to malfunction or not work at all.
Possible symptoms
- A/C system not working or working intermittently
- Illuminated A/C warning light
- Reduced cooling performance from the A/C system
- Unusual noises coming from the A/C system.
Possible causes
- Loose or corroded electrical connections in the circuit
- Failed A/C refrigerant pressure sensor
- Faulty wiring or connections in the circuit
- Failed engine control module (ECM)
Related parts
- A/C Evaporator Temperature Sensor: Prevents the air conditioning refrigerant from becoming too cold. Problems lead to reduced AC cooling
Possible solutions
- Check and repair any damaged wiring or connections
- Tighten or clean any loose or corroded electrical connections
- Replace the A/C refrigerant pressure sensor if necessary
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0539 on OBD DashX
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