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 a part in your car's transmission, which helps control the pressure of the fluid, is not working all the time. It's like a light switch that sometimes turns on and sometimes doesn't.
The P27C4 code indicates an intermittent issue with the pressure control solenoid P, which is responsible for regulating hydraulic pressure in the transmission.
The pressure control solenoid P is a component within the transmission that helps manage the hydraulic pressure applied to the transmission's clutches and bands. An intermittent fault means that the solenoid is not consistently maintaining the required pressure, leading to potential shifting issues or transmission performance problems.
• Erratic or harsh shifting
• Transmission slipping
• Illuminated check engine light
• Faulty pressure control solenoid P
• Wiring issues or poor electrical connections
• Transmission fluid contamination or low fluid levels
Solenoid: An electromechanical device that controls fluid flow.
Hydraulic Pressure: Pressure exerted by a fluid in a confined space, used to transmit force.
• Scan the vehicle for additional codes.
• Inspect the wiring and connectors to the solenoid.
• Check transmission fluid level and condition.
• Replace the faulty pressure control solenoid.
• Repair or replace damaged wiring or connectors.
• Perform a transmission fluid flush and refill.
• OBD-II scanner
• Multimeter
• Transmission fluid flush kit
$200 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular transmission fluid changes
• Routine vehicle maintenance checks
• Inspect electrical connections periodically
Transmission Control Issue
• Avoid driving aggressively until the issue is resolved.
• Consult a professional mechanic for an accurate diagnosis.
Check with your vehicle manufacturer for specific warranty coverage on transmission components.
This code has been associated with intermittent transmission issues in vehicles with higher mileage or those that have not had regular transmission maintenance.
Moderate – Addressing this issue promptly can prevent further transmission damage.
Driving with a malfunctioning transmission can lead to safety hazards. It is advisable to have the issue inspected by a professional.
• Vehicle at operating temperature
• Transmission in drive mode
The pressure control solenoid is located inside the transmission, often accessible by removing the transmission pan.
Q: Can I drive with a P27C4 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to transmission damage.
Q: How do I reset the check engine light after fixing the issue?
A: You can reset the light using an OBD-II scanner or by disconnecting the battery for a few minutes.
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