P2776 Fault Code

Upshift Switch Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2776 fault code indicates an issue with the upshift switch circuit in the vehicle, which generally affects the functionality of the transmission and can lead to suboptimal shifting behavior. The upshift switch is responsible for signaling the transmission control module (TCM) to shift the transmission to a higher gear. When this circuit is low, it means the signal from the switch is not as strong as expected or is absent altogether.

What are the symptoms of the P2776 code?

Symptoms associated with the P2776 fault code may include:

• Inability to shift into higher gears
• Erratic or delayed shifting behavior
• Warning lights illuminated on the dashboard, such as the check engine light
• Decreased fuel efficiency and overall performance
• Transmission slipping or getting stuck in one gear.

What causes the P2776 code?

Common causes of the P2776 fault code include:

• Faulty upshift switch
• Damaged wiring or poor connections in the upshift switch circuit
• Issues with the transmission control module (TCM)
• Short circuit or open circuit in the wiring harness
• Corrosion in connectors related to the upshift switch.

How to fix P2776?

To resolve the P2776 fault code, the following actions can be taken:

• Inspect the upshift switch and test its functionality; replace it if faulty.
• Check the wiring and connectors for damage, corrosion, or loose connections, and repair as necessary.
• Test the transmission control module (TCM) for faults and replace if it is malfunctioning.
• Clear the fault codes and perform a test drive to ensure the issue has been resolved.