Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a part that helps control how fast the engine runs when you're not pressing the gas. This code means there's a problem with the part that tells it to close, like a light switch that's stuck on.
The engine control module (ECM) has detected a high voltage signal in the circuit that controls the idle speed control valve's closing solenoid.
The P1502 code indicates that the ECM has detected a high voltage condition in the idle speed control valve closing solenoid control circuit. This solenoid is responsible for adjusting the idle speed of the engine by controlling the amount of air bypassing the throttle plate. A high voltage signal may indicate a short circuit or an issue with the solenoid itself.
• Engine idles erratically
• Check Engine Light is on
• Poor fuel economy
• Faulty idle speed control valve
• Wiring issues such as shorts or open circuits
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
Solenoid: An electromechanical device that converts electrical energy into mechanical movement.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the idle speed control valve solenoid for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the idle speed control valve if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regularly check and maintain wiring and connectors.
• Perform scheduled maintenance on the idle control system.
• Use quality replacement parts.
Engine Performance
• Avoid driving at high speeds until the issue is resolved.
• Get the vehicle inspected by a professional mechanic.
Check with your vehicle manufacturer. Some powertrain warranties may cover this issue.
This code has been associated with idle control issues in older vehicle models with mechanical idle control systems.
Moderate – It's important to address this issue to prevent further engine performance problems.
Ignoring this code may lead to increased emissions and potential safety concerns due to erratic engine behavior.
• Engine at normal operating temperature
• Vehicle in park or neutral
The idle speed control valve is typically located on or near the throttle body.
Q: Can I drive with the P1502 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to poor engine performance and increased emissions.
Q: How can I prevent this code from appearing again?
A: Regular maintenance and inspections of the idle control system and wiring can help prevent this issue.
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