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 computer in your car thinks the temperature sensor for the air conditioner's control module is reading too high.
The vehicle's computer has detected a high voltage signal from the temperature sensor circuit in the A/C compressor control module.
The P0D77 code is triggered when the A/C compressor control module detects a high voltage condition in the output driver temperature sensor circuit. This could indicate an issue with the sensor itself, the wiring, or the control module.
• A/C not functioning properly
• Check engine light illuminated
• Unusual noises from the A/C system
• Faulty temperature sensor
• Wiring issues such as shorts or open circuits
• Malfunctioning A/C compressor control module
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics in vehicles.
A/C Compressor: A component in the air conditioning system that compresses refrigerant and circulates it through the system.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the temperature sensor.
• Test the temperature sensor for proper operation.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring or connectors.
• Replace the A/C compressor control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance of the A/C system
• Periodic inspection of wiring and connections
• Use of quality replacement parts
Sensor Issue
• Avoid using the A/C until the issue is resolved.
• Consult a professional mechanic for diagnosis and repair.
Check with your vehicle manufacturer for warranty coverage on A/C components.
This code is relatively uncommon and is typically associated with hybrid or electric vehicles that have complex A/C systems.
Moderate – It is advisable to address this issue to ensure proper A/C function and avoid further damage.
Driving with a malfunctioning A/C system may not affect vehicle safety but can lead to discomfort and further mechanical issues.
• Engine running
• A/C system activated
The A/C compressor control module is typically located near the A/C compressor in the engine bay.
Q: Can I drive my car with this code?
A: Yes, but it is recommended to fix the issue to ensure your A/C system works properly.
Q: Will this code affect my car's performance?
A: It may not affect engine performance, but it can impact the A/C system's functionality.
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