Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's air conditioner has a sensor that checks the temperature. This sensor is not working properly all the time, which might make the air conditioner act funny.
The error code P0D79 indicates that the temperature sensor in the A/C compressor control module is sending signals that are not consistent or are erratic.
The A/C compressor control module monitors the temperature of its output driver using a dedicated sensor. If the sensor's signal is intermittent or erratic, the module cannot accurately control the compressor's operation, leading to potential A/C performance issues.
• Inconsistent A/C cooling
• A/C system turning on and off unexpectedly
• Check Engine Light illuminated
• Faulty temperature sensor
• Wiring issues such as loose connections or damaged wires
• Faulty A/C compressor control module
A/C: Air Conditioning
Compressor: A device that compresses refrigerant in the A/C system
Sensor: A device that detects or measures a physical property
• Inspect the wiring and connections to the temperature sensor.
• Test the temperature sensor for proper operation.
• Check the A/C compressor control module for faults.
• Repair or replace damaged wiring or connectors.
• Replace the faulty temperature sensor.
• Replace the A/C compressor control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect A/C system wiring.
• Ensure connectors are secure.
• Perform routine A/C system maintenance.
Sensor Issue
• Have the A/C system checked by a professional.
• Avoid using the A/C excessively until repaired.
Repairs may be covered under vehicle's powertrain or emissions warranty.
This code is relatively uncommon and often associated with hybrid or electric vehicles where A/C systems are more complex.
Moderate – While it may not affect immediate drivability, it can lead to discomfort and further A/C system damage if left unaddressed.
Driving with a malfunctioning A/C system is not illegal but can be uncomfortable and potentially lead to further vehicle issues.
• Vehicle at operating temperature
• A/C system engaged
The A/C compressor control module is typically located near the A/C compressor in the engine bay.
Q: Can I drive with a P0D79 code?
A: Yes, but it is advisable to get it fixed soon to avoid further A/C issues.
Q: Will this code affect my car's performance?
A: It primarily affects the A/C system, not the overall vehicle performance.
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