P2778 Code - Upshift Switch Circuit Intermittent/Erratic
Quick Answer
The P2778 diagnostic trouble code (DTC) refers to the Upshift Switch Circuit being intermittent or erratic. Common causes include Faulty upshift switch, Damaged wiring or connectors in the circuit, Corrosion in the electrical connections. 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
- P2778 indicates Upshift Switch Circuit Intermittent/Erratic.
- Common causes
- Common causes include Faulty upshift switch, Damaged wiring or connectors in the circuit, Corrosion in the electrical connections.
- 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 P2778 Description
The P2778 diagnostic trouble code (DTC) refers to the Upshift Switch Circuit being intermittent or erratic. This code is typically found in vehicles with automatic transmissions. The upshift switch is a component that signals the transmission control module (TCM) when to shift to a higher gear. When this circuit is experiencing issues, it can lead to erratic shifting behavior, causing the vehicle to shift gears at the wrong times or not shift at all.
Common Causes of P2778
- Faulty upshift switch
- Damaged wiring or connectors in the circuit
- Corrosion in the electrical connections
- Issues with the transmission control module (TCM)
- Software issues in the TCM
Symptoms of P2778
- Erratic shifting behavior
- Delayed or harsh shifting
- Transmission slipping
- Check Engine Light illuminated
- Reduced fuel efficiency
How to Fix P2778
- Diagnose the specific cause of the issue using a scan tool to read the DTC and perform a visual inspection of the upshift switch and related components.
- Test the upshift switch for proper functionality and replace if necessary.
- Check the wiring and connectors for any damage or corrosion, repairing or replacing as needed.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be required to identify any underlying issues with the TCM or transmission system.
Cost to Fix P2778
The cost of repairing a P2778 code can vary depending on the specific cause of the issue and the labor rates in your area. In general, the repair costs for this type of issue can range from $100 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 P2778 Information for Specific Makes
- P2778 Dodge — Upshift Switch Circuit Intermittent/Erratic
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