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 car's computer found a problem with the temperature sensors inside the electric air conditioner compressor. It's like when a thermometer doesn't agree with another one, and the car gets confused.
The car's air conditioning system uses sensors to measure temperature. If these sensors give readings that don't match up, the system flags an error.
The P1D19 code indicates that the Electric A/C Compressor Control Module has detected a discrepancy between the internal temperature readings from two sensors, labeled 'A' and 'B'. This discrepancy suggests that the sensors are not correlating as expected, which could affect the compressor's operation.
• Air conditioning not cooling effectively
• Check engine light illuminated
• Unusual noises from the A/C compressor
• Faulty temperature sensor 'A' or 'B'
• Wiring issues between the sensors and control module
• Malfunctioning Electric A/C Compressor Control Module
Compressor: A device that increases the pressure of a gas by reducing its volume.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Verify the code with an OBD-II scanner
• Inspect the wiring and connections to the temperature sensors
• Test the sensors for proper operation
• Replace faulty temperature sensor
• Repair or replace damaged wiring
• Replace the Electric A/C Compressor Control Module if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Honda Accord
• Honda Civic
• Honda CR-V
• Regular maintenance of the A/C system
• Check wiring and connections periodically
• Ensure sensors are clean and functioning
Sensor Issue
• Have the A/C system checked by a professional
• Avoid using the A/C until the issue is resolved
Check with the vehicle manufacturer for warranty coverage on the A/C system components.
This code typically appears in vehicles with electric A/C compressors that have been in use for several years.
Moderate – While it may not cause immediate damage, it can lead to discomfort and inefficient A/C operation.
Driving with a malfunctioning A/C system is not illegal, but it can lead to discomfort and potential overheating of the system.
• Engine running
• A/C system activated
The Electric A/C Compressor Control Module is typically located near the A/C compressor in the engine bay.
Q: Can I still drive my car with this code?
A: Yes, but your A/C might not work properly, and it could cause discomfort.
Q: Will this issue damage my car?
A: It won't cause immediate damage, but ignoring it can lead to more serious A/C problems.
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.