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 is getting a signal that's too high from the switch that tells the car to change to a higher gear.
The P2777 code is triggered when the powertrain control module (PCM) detects a high voltage signal from the upshift switch circuit.
The upshift switch is part of the transmission control system that allows the driver to manually shift to a higher gear. A 'circuit high' condition indicates that the voltage in the circuit is higher than expected, which could be due to a short circuit, a faulty switch, or wiring issues.
• Check Engine Light is on
• Transmission may not shift properly
• Reduced fuel efficiency
• Faulty upshift switch
• Short circuit in the wiring
• Defective transmission control module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the upshift switch and its wiring for damage.
• Test the voltage levels in the circuit.
• Replace the faulty upshift switch.
• Repair or replace damaged wiring.
• Reprogram or replace the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain transmission components.
• Avoid aggressive driving habits.
• Ensure proper electrical connections.
Transmission Control System Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you notice shifting issues.
Check with your vehicle manufacturer; transmission components may be covered under powertrain warranty.
This code has been associated with manual shift mode vehicles and is often seen in vehicles with higher mileage.
Moderate – While the vehicle may still be drivable, ignoring the issue could lead to further transmission damage.
Driving with a malfunctioning transmission can be unsafe and may lead to further vehicle damage.
• Vehicle in manual shift mode
• Engine running and vehicle in motion
The upshift switch is typically located on or near the gear shifter or steering column.
Q: Can I drive with a P2777 code?
A: It's possible to drive, but it's not recommended as it could lead to further transmission issues.
Q: How do I reset the P2777 code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first.
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