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 has detected a problem with the part that helps change gears in an automatic transmission. It's like if a robot arm that helps switch gears isn't working right.
The P285F code is triggered when the transmission control module (TCM) detects an open circuit or fault in the shift fork B actuator circuit.
The shift fork B actuator is responsible for moving the shift fork that engages and disengages gears in the transmission. An open or faulty circuit in this actuator can prevent the transmission from shifting properly, leading to drivability issues.
• Check Engine Light is on
• Transmission may not shift properly
• Vehicle may go into limp mode
• Faulty shift fork B actuator
• Open or shorted wiring in the actuator circuit
• Faulty transmission control module (TCM)
Transmission Control Module (TCM): A computer that controls the operation of the transmission.
Actuator: A component that moves or controls a mechanism or system.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the shift fork B actuator for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the shift fork B actuator if faulty.
• Reprogram or replace the TCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Ford Focus
• Chevrolet Cruze
• Volkswagen Jetta
• Regularly inspect transmission wiring.
• Keep the transmission fluid clean and at the proper level.
• Have the transmission serviced at recommended intervals.
Transmission Control Issue
• Avoid driving the vehicle if it is not shifting properly.
• Have the vehicle diagnosed and repaired by a professional.
• Regular maintenance can prevent such issues.
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been more prevalent in vehicles with dual-clutch transmissions, which use actuators to engage gears.
Moderate – This issue should be addressed soon to avoid further transmission damage.
Driving with a faulty transmission can be dangerous and may lead to further vehicle damage.
• Vehicle should be at operating temperature.
• Test drive the vehicle to confirm shifting issues.
The shift fork B actuator is located within the transmission assembly.
Q: Can I drive my car with a P285F code?
A: It's not recommended to drive with this code, as it can cause further damage to the transmission.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of the transmission system can help prevent this issue.
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