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 there's a problem with a part in your car that helps control the pressure of the transmission fluid. It's like a switch that's not working properly, and it makes the car's computer unhappy.
The P1845 code indicates that the transmission control module (TCM) has detected a low voltage or resistance issue in the circuit that controls the pressure control solenoid 'E'.
Pressure control solenoids are responsible for regulating the hydraulic pressure in the transmission. The 'E' solenoid is one of several that help manage the transmission's shift timing and quality. When the circuit for this solenoid reports a low voltage, it can affect the transmission's ability to shift gears smoothly.
• Harsh or erratic shifting
• Transmission slipping
• Check Engine Light illuminated
• Faulty pressure control solenoid 'E'
• Wiring issues such as shorts or open circuits
• Malfunctioning transmission control module (TCM)
Solenoid: An electromechanical device that converts electrical energy into mechanical movement.
TCM: Transmission Control Module, a computer that controls transmission functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the pressure control solenoid 'E' for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty pressure control solenoid 'E'.
• Reprogram or replace the TCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular transmission fluid changes
• Inspect wiring harnesses periodically
• Avoid harsh driving conditions
Transmission Control Issue
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult with a professional mechanic for accurate diagnosis.
Check vehicle warranty for coverage on transmission components.
This code has been associated with transmission issues in vehicles with electronic control systems since the early 2000s.
Moderate – It is advised to address this issue soon to avoid potential transmission damage.
Driving with transmission issues can be unsafe and may lead to more costly repairs if not addressed promptly.
• Vehicle at operating temperature
• Engine running
The pressure control solenoids are located within the transmission valve body, which is typically accessed by removing the transmission pan.
Q: Can I drive with a P1845 code?
A: It's not recommended to drive with this code, as it can cause further damage to the transmission.
Q: How is the pressure control solenoid tested?
A: A multimeter is used to check the resistance and voltage of the solenoid circuit to ensure it's functioning properly.
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