Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the part of the car that helps keep you cool, called the air conditioning compressor, isn't working all the time like it should. It's like when a fan keeps turning on and off by itself.
The P1555 code indicates that there is an intermittent electrical issue in the circuit that controls the air conditioning compressor.
The P1555 code is triggered when the Engine Control Module (ECM) detects an intermittent fault in the electrical circuit of the air conditioning compressor. This could be due to loose connections, faulty wiring, or a failing compressor clutch.
• Air conditioning system not cooling properly
• Intermittent operation of the air conditioning system
• Warning light on the dashboard
• Loose or corroded electrical connections
• Faulty air conditioning compressor clutch
• Damaged wiring or connectors in the circuit
Compressor: A device that increases the pressure of a gas by reducing its volume.
Circuit: A complete and closed path around which a circulating electric current can flow.
• Inspect the electrical connections to the air conditioning compressor.
• Check the wiring for any signs of damage or corrosion.
• Test the compressor clutch for proper operation.
• Tighten or clean any loose or corroded connections.
• Repair or replace damaged wiring or connectors.
• Replace the air conditioning compressor clutch if faulty.
• Multimeter
• Wrench set
• Screwdriver set
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly check and maintain electrical connections.
• Inspect wiring for signs of wear or damage.
• Schedule routine air conditioning system maintenance.
Electrical Circuit Issue
• Have a professional inspect the air conditioning system.
• Avoid using the air conditioning until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer for warranty coverage on air conditioning components.
This code has been associated with vehicles that have experienced issues with air conditioning system reliability due to electrical faults.
Moderate – While not critical, addressing this issue will improve comfort and prevent further damage.
Ignoring this issue may lead to discomfort during driving and could potentially cause further damage to the air conditioning system.
• Vehicle engine running
• Air conditioning system turned on
The air conditioning compressor is typically located at the front of the engine bay, driven by the engine's serpentine belt.
Q: Can I still drive my car with this code?
A: Yes, but your air conditioning might not work properly, which could be uncomfortable in hot weather.
Q: Will this code affect my car's performance?
A: No, it won't affect the engine's performance, but it will affect the air conditioning system's ability to cool the cabin.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.