AutoCodes – Dodge – P2778 Dodge

P2778 Dodge Code - Upshift Switch Circuit Intermittent/Erratic

Quick Answer

The Engine Control Module (ECM) monitors the Upshift Switch Circuit signal. Common causes include Faulty Upshift Switch, Upshift Switch harness is open or shorted, Upshift Switch circuit poor electrical connection. 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 Dodge indicates Upshift Switch Circuit Intermittent/Erratic.
Common causes: Common causes include Faulty Upshift Switch, Upshift Switch harness is open or shorted, Upshift Switch circuit poor electrical connection.
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 Popularity 2,575

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2778 Dodge Description

The Engine Control Module (ECM) monitors the Upshift Switch Circuit signal. The ECM sets the OBDII code when the Upshift Switch Circuit signal is out of factory specifications.

OBDII Code P2778 Dodge - Upshift Switch Circuit Intermittent/Erratic - AutoCodes.com — P2778 Dodge Code - Upshift Switch Circuit Intermittent/Erratic

What does this mean?

What are the Possible Causes of the DTC P2778 Dodge?

Faulty Upshift Switch
Upshift Switch harness is open or shorted
Upshift Switch circuit poor electrical connection

How to Fix the DTC P2778 Dodge?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2778 Dodge code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 P2778 Dodge Code

1. What does the OBDII code P2778 mean for a Dodge vehicle?

P2778 indicates an intermittent or erratic issue in the upshift switch circuit, which affects the vehicle's ability to properly control gear shifting.

2. What are the common symptoms of a P2778 code in a Dodge?

Symptoms may include difficulty shifting gears, erratic or delayed shifting, transmission slipping, and the check engine light being illuminated.

3. What causes the P2778 code to appear in a Dodge?

Common causes include a faulty upshift switch, damaged wiring or connectors in the upshift circuit, a malfunctioning transmission control module (TCM), or contamination in the transmission fluid.

4. Can driving with a P2778 code damage my Dodge's transmission?

Yes, ignoring this code can lead to further transmission issues, as improper shifting can cause stress and wear on transmission components.

5. How do I diagnose a P2778 code in my Dodge?

Diagnosis involves checking the upshift switch for proper function, inspecting the wiring and connectors for damage or corrosion, and testing the TCM for faults.

6. Is a faulty upshift switch the only possible reason for a P2778 code?

No, while the upshift switch is a common culprit, the issue could also stem from wiring problems, a failing TCM, or even low-quality or contaminated transmission fluid.

7. How can I fix the P2778 code on my Dodge?

Repairs may include replacing the upshift switch, repairing or replacing damaged wiring or connectors, cleaning or replacing the transmission fluid, or reprogramming or replacing the TCM.

8. Does the P2778 code always require professional repair?

Not always. If the issue is caused by a loose or corroded connector, you may be able to fix it yourself. However, more complex issues like TCM failure may require a professional.

9. How much does it cost to repair a P2778 code in a Dodge?

Repair costs vary depending on the issue, ranging from $50 for simple wiring repairs to over $500 for replacing the TCM. Diagnostic fees may also apply.

10. Can a P2778 code trigger other transmission-related codes in my Dodge?

Yes, if the upshift circuit is malfunctioning, it may cause related codes, such as those for gear ratio errors or other switch circuit faults, to appear.