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P2777 Dodge Code - Upshift Switch Circuit High

Quick Answer

The P2777 diagnostic trouble code (DTC) for Dodge vehicles refers to the Upshift Switch Circuit High. Common causes include Faulty upshift switch, Damaged wiring harness or connectors, Corrosion or poor connections in the circuit. 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 Dodge indicates Upshift Switch Circuit High.
Common causes
Common causes include Faulty upshift switch, Damaged wiring harness or connectors, Corrosion or poor connections in the circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2777 Dodge Description

The P2777 diagnostic trouble code (DTC) for Dodge vehicles refers to the Upshift Switch Circuit High. This code indicates that there is an issue with the upshift switch circuit, which is responsible for signaling the transmission to shift gears. In automatic transmissions, the upshift switch is used to control the timing and smoothness of gear changes, ensuring optimal performance and fuel efficiency.

OBDII Code P2777 Dodge - Upshift Switch Circuit High
P2777 Dodge Code - Upshift Switch Circuit High

Common Causes of P2777 Dodge

  1. Faulty upshift switch
  2. Damaged wiring harness or connectors
  3. Corrosion or poor connections in the circuit
  4. ECM malfunction or software issue
  5. Short circuit in the upshift switch circuit

Symptoms of P2777 Dodge

  1. Delayed or harsh shifting between gears
  2. Reduced fuel efficiency
  3. Transmission slipping or jerking
  4. Illumination of the Check Engine Light
  5. Inability to manually shift gears using the upshift switch

How to Fix P2777 Dodge

  1. Use a diagnostic scan tool to retrieve the trouble code and identify the specific cause of the issue.
  2. Inspect the upshift switch, wiring harness, and connectors for any visible damage or corrosion. Replace any faulty components.
  3. Check the voltage and continuity of the upshift switch circuit using a multimeter to pinpoint the exact source of the high voltage signal.
  4. Clear the DTC and reset the ECM to see if the code reoccurs after the repair.
  5. Test drive the vehicle to ensure that the upshift switch circuit is functioning correctly and that the symptoms associated with the P2777 code have been resolved.

Cost to Fix P2777 Dodge

The cost of repairing the Upshift Switch Circuit High issue (P2777) in a Dodge vehicle can vary depending on the specific cause of the problem and the labor rates in your area. On average, the repair costs for this issue can range from $150 to $500, including parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it is advisable to get a detailed estimate from a trusted mechanic before proceeding with the repair.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2777 Dodge Code

1. What does OBDII code P2777 mean on a Dodge vehicle?

P2777 indicates a problem with the upshift switch circuit, specifically that the circuit is experiencing a high voltage condition.

2. What are the common symptoms of code P2777 in a Dodge?

Common symptoms include delayed or harsh shifting, inability to shift gears, reduced fuel efficiency, and the illumination of the check engine light.

3. What causes the P2777 code to trigger on a Dodge?

The code is typically caused by a faulty upshift switch, damaged wiring or connectors in the circuit, or a malfunctioning transmission control module (TCM).

4. Can I drive my Dodge with a P2777 code?

While the vehicle may still be drivable, driving with this code can lead to poor performance, potential transmission damage, and unsafe driving conditions. It’s best to address the issue promptly.

5. How do you diagnose a P2777 code on a Dodge?

Diagnosis involves scanning for codes, inspecting the upshift switch and associated wiring for damage, testing the circuit for high voltage, and evaluating the TCM for proper operation.

6. How is the P2777 code fixed on a Dodge?

Repairs may include replacing the upshift switch, repairing or replacing damaged wiring or connectors, and updating or reprogramming the TCM if necessary.

7. Can a bad TCM cause the P2777 code?

Yes, a malfunctioning transmission control module can lead to this code if it fails to properly regulate the upshift switch circuit.

8. How much does it cost to fix the P2777 code on a Dodge?

Repair costs can range from $100 to $500 or more, depending on whether the issue is with the switch, wiring, or TCM.

9. Can low transmission fluid cause the P2777 code?

Low transmission fluid itself does not directly cause the P2777 code, but it can lead to transmission issues that may indirectly trigger it. Always ensure fluid levels are correct.

10. Will clearing the P2777 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

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