Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that the part of the car that helps keep the inside cool is getting too hot, which might make the air conditioner not work well.
The A/C evaporator temperature sensor is detecting a temperature that is higher than expected, which can affect the air conditioning system's performance.
The A/C evaporator temperature sensor monitors the temperature of the evaporator core, which is part of the air conditioning system. If the sensor detects a temperature that is higher than the specified threshold, it triggers the P1D3C code. This could indicate a problem with the sensor itself, the wiring, or the air conditioning system's efficiency.
• Ineffective air conditioning
• Warm air blowing from vents
• A/C system not cooling properly
• Check engine light on
• Faulty A/C evaporator temperature sensor
• Wiring issues or poor connections
• Refrigerant levels too low or too high
• Blocked or dirty evaporator
• Faulty A/C compressor
A/C: Air Conditioning
Evaporator: A component in the A/C system that absorbs heat from the air inside the car
• Check for any other related codes
• Inspect the A/C evaporator temperature sensor and its wiring
• Verify refrigerant levels
• Check the evaporator for blockages or dirt
• Test the A/C compressor functionality
• Replace the A/C evaporator temperature sensor if faulty
• Repair or replace damaged wiring or connections
• Adjust refrigerant levels to the correct amount
• Clean or replace the evaporator if blocked or dirty
• Repair or replace the A/C compressor if necessary
• OBD-II scanner
• Multimeter
• Refrigerant pressure gauge
• Basic hand tools
$100 - $500
Moderate
• Honda Accord
• Toyota Camry
• Ford Fusion
• Regularly service the A/C system
• Check refrigerant levels periodically
• Ensure the evaporator is clean and unobstructed
Sensor Issue
• Have your A/C system checked regularly
• Address any A/C issues promptly to avoid discomfort
• Consider using sunshades to reduce cabin temperature
Check with your vehicle manufacturer for specific warranty coverage on the A/C system components.
This code is commonly associated with A/C efficiency issues and has been more prevalent in vehicles with higher mileage.
Moderate – It affects comfort but not immediate vehicle operability.
Ensure repairs are conducted by a qualified technician to avoid exposure to refrigerants and ensure proper system function.
• Vehicle engine running
• A/C system activated
The A/C evaporator temperature sensor is typically located near the evaporator core within the HVAC housing inside the dashboard.
Q: Can I keep driving with this code?
A: Yes, but your A/C might not work well, making the car uncomfortable in hot weather.
Q: Will this code affect my car's engine?
A: No, this code specifically affects the air conditioning system, not the engine.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.