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 is getting a signal that is too high from the air conditioning system. It's like when you turn the volume up too high on a speaker and it starts to sound bad.
The P2524 code is triggered when the Powertrain Control Module (PCM) detects a high voltage condition in the A/C Request B circuit.
The A/C Request B circuit is responsible for communicating the air conditioning system's operational status to the vehicle's PCM. A 'high' signal typically indicates that the voltage in the circuit is above the expected range, which could be due to a short circuit, faulty wiring, or a malfunctioning component.
• Air conditioning not working
• Check Engine Light illuminated
• Erratic A/C performance
• Faulty A/C request switch
• Short to voltage in the A/C Request B circuit
• Faulty PCM
PCM: Powertrain Control Module
HVAC: Heating, Ventilation, and Air Conditioning
• Check for any other related trouble codes.
• Inspect the A/C Request B circuit wiring for damage.
• Test the A/C request switch for proper operation.
• Repair or replace damaged wiring in the A/C Request B circuit.
• Replace the faulty A/C request switch.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Wire repair kit
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect A/C system wiring.
• Ensure proper maintenance of the A/C system.
• Avoid overloading the electrical system.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the A/C system inspected by a professional.
• Avoid using the A/C system until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on electrical components.
This code has been reported in vehicles with aging electrical systems or after aftermarket modifications.
Moderate – It is advisable to address this issue soon to ensure proper A/C functionality.
Driving with a malfunctioning A/C system may not be illegal, but it can lead to discomfort and distraction while driving.
• Engine running
• A/C system activated
The A/C request switch is typically located on or near the HVAC control panel.
Q: Can I drive my car with this code?
A: Yes, but you may not have functioning air conditioning, which can be uncomfortable.
Q: Will this code affect my car's performance?
A: It primarily affects the air conditioning system and should not impact engine performance.
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.