Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car's heating and cooling system called the 'expansion valve.' It helps control the temperature inside the car.
The P1D96 code indicates an issue with the operation or control of the second expansion valve in the vehicle's heat pump system.
The heat pump expansion valve 'B' is responsible for regulating the flow of refrigerant in the heat pump system. It adjusts the pressure and temperature of the refrigerant, ensuring efficient heating and cooling. A fault in this valve can lead to incorrect refrigerant flow, impacting the system's performance.
• Inadequate heating or cooling
• Unusual noises from the HVAC system
• Warning light on the dashboard
• Faulty expansion valve
• Electrical connection issues
• Refrigerant leaks
Expansion Valve: A component that regulates refrigerant flow in an HVAC system.
Refrigerant: A fluid used in the HVAC system to transfer heat.
• Check for stored codes and freeze frame data
• Inspect the expansion valve and its connections
• Test the electrical circuit for continuity
• Replace the faulty expansion valve
• Repair or replace damaged wiring or connectors
• Recharge the refrigerant if necessary
• OBD-II scanner
• Multimeter
• Refrigerant recovery machine
$200 - $500
Moderate
• Honda Clarity
• Toyota Prius
• Chevrolet Volt
• Regular HVAC system maintenance
• Check refrigerant levels periodically
• Inspect electrical connections for corrosion
HVAC System Issue
• Have the HVAC system checked regularly
• Address any unusual HVAC noises promptly
Check with the manufacturer for specific warranty coverage on HVAC components.
This code has become more common with the increased use of heat pump systems in hybrid and electric vehicles.
Moderate – While the vehicle can still be driven, the heating and cooling performance may be compromised.
Driving with a malfunctioning HVAC system may lead to discomfort and reduced visibility due to fogging.
• Vehicle at operating temperature
• HVAC system activated
The expansion valve is typically located near the evaporator in the HVAC system.
Q: Can I drive with a P1D96 code?
A: Yes, but you may experience reduced heating or cooling performance.
Q: How can I prevent this issue?
A: Regular maintenance and inspections can help prevent HVAC system issues.
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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.
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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.
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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.