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 thinks the sensor that checks the temperature of the air conditioning system is getting a signal that's too high. It's like when a thermometer says it's way hotter than it actually is.
The P1D68 code indicates that the temperature sensor in the A/C coolant heater control module is reporting a voltage higher than expected, suggesting a possible fault.
The A/C Coolant Heater Control Module Temperature Sensor Circuit High code is triggered when the powertrain control module (PCM) detects a voltage signal from the A/C coolant heater temperature sensor that is above the normal operating range. This could be due to a short circuit, a faulty sensor, or an issue with the wiring.
• Check Engine Light is on
• A/C system not functioning properly
• Inconsistent cabin temperature
• Faulty temperature sensor
• Short circuit in the wiring
• Faulty A/C coolant heater control module
PCM: Powertrain Control Module
A/C: Air Conditioning
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the temperature sensor for proper resistance and voltage.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring or connectors.
• Replace the A/C coolant heater control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Honda Accord
• Honda Civic
• Honda CR-V
• Regular maintenance of the A/C system.
• Inspect wiring and connectors periodically.
• Ensure sensors are functioning properly.
Sensor Issue
• Have the vehicle inspected by a professional.
• Avoid using the A/C until the issue is resolved.
Check with the vehicle manufacturer for specific warranty coverage related to the A/C system components.
This code has been reported in vehicles with aging A/C systems or those frequently used in extreme temperatures.
Moderate – It should be addressed soon to ensure proper A/C function and prevent further damage.
Driving with a malfunctioning A/C system may not be illegal, but it can lead to discomfort and potential overheating of the vehicle.
• Engine running
• A/C system activated
The temperature sensor is typically located near the A/C coolant heater control module, usually in the engine compartment.
Q: Can I drive with this code?
A: Yes, but it's best to get it checked soon to avoid discomfort and potential further issues.
Q: Will this affect my car's performance?
A: It may not affect engine performance but can impact the effectiveness of the A/C system.
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