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 in your car that helps control the pressure in the transmission. It's like having a switch that isn't working right.
The P1738 code indicates an issue with the electrical circuit of the pressure control solenoid 'C' in the transmission.
The pressure control solenoid 'C' is responsible for regulating hydraulic pressure in the transmission. This solenoid is controlled by the vehicle's powertrain control module (PCM) and helps ensure smooth shifting. When the PCM detects an electrical issue with this solenoid, it triggers the P1738 code.
• Harsh or erratic shifting
• Transmission slipping
• Illuminated check engine light
• Faulty pressure control solenoid 'C'
• Wiring issues such as short or open circuits
• Faulty PCM
PCM: Powertrain Control Module
Solenoid: An electromechanical device that controls fluid flow in the transmission
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the solenoid's electrical resistance.
• Replace the faulty solenoid.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $500
Moderate
• Honda Accord
• Acura TL
• Honda Odyssey
• Regular transmission fluid changes
• Inspect wiring and connectors periodically
• Avoid aggressive driving habits
Transmission Issue
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult a professional mechanic for diagnosis and repair.
Check with your vehicle manufacturer for specific warranty coverage on transmission components.
The P1738 code has been commonly reported in older Honda and Acura models, often related to transmission issues.
High – Address promptly to avoid transmission damage.
Driving with transmission issues can be dangerous and may lead to further vehicle damage.
• Vehicle at operating temperature
• Transmission in drive
The pressure control solenoid is located inside the transmission, typically accessible by removing the transmission pan.
Q: Can I drive with a P1738 code?
A: It's not recommended to drive with this code as it can lead to transmission damage.
Q: How is a pressure control solenoid tested?
A: A multimeter is used to check the solenoid's electrical resistance and ensure it's within specifications.
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