P2777 Code - Upshift Switch Circuit High
Quick Answer
The diagnostic trouble code P2777 indicates that there is a high voltage condition detected in the upshift switch circuit. Common causes include Faulty upshift switch, Wiring issues such as shorts or open circuits, Malfunctioning TCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2777 indicates Upshift Switch Circuit High.
- Common causes
- Common causes include Faulty upshift switch, Wiring issues such as shorts or open circuits, Malfunctioning TCM.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P2777 Description
The diagnostic trouble code P2777 indicates that there is a high voltage condition detected in the upshift switch circuit. This code is typically found in vehicles with automatic transmissions. The upshift switch is a component that signals the transmission control module (TCM) when the driver wants to shift to a higher gear. When the TCM receives a high voltage signal from the upshift switch circuit, it can lead to issues with the transmission's shifting behavior.
Common Causes of P2777
- Faulty upshift switch
- Wiring issues such as shorts or open circuits
- Malfunctioning TCM
- Transmission fluid contamination
- Mechanical issues within the transmission
Symptoms of P2777
- Harsh or delayed shifting between gears
- Transmission slipping
- Inability to shift into higher gears
- Illumination of the check engine light
- Decreased fuel efficiency
How to Fix P2777
- Begin by conducting a thorough inspection of the upshift switch circuit, including the wiring and connections. Repair any damaged or corroded wires.
- Test the upshift switch for proper functionality. Replace the switch if it is found to be faulty.
- Check the TCM for any signs of damage or malfunction. Replace or reprogram the TCM as necessary.
- Inspect the transmission fluid for contamination or signs of wear. Perform a transmission fluid flush and filter replacement if needed.
- Test drive the vehicle to ensure the issue has been resolved and that the transmission is shifting correctly.
Cost to Fix P2777
The cost of repairing the upshift switch circuit high issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the repair costs for this type of issue can range from $200 to $500, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple shops to get a more accurate estimate.
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Code P2777 Information for Specific Makes
- P2777 Dodge — Upshift Switch Circuit High
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