AutoCodes – Dodge – P2779 Dodge

P2779 Dodge Code - Downshift Switch Circuit Range/Performance

Quick Answer

The Engine Control Module (ECM) monitors the Downshift Switch Circuit signal. Common causes include Faulty Downshift Switch, Downshift Switch harness is open or shorted, Downshift 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: P2779 Dodge indicates Downshift Switch Circuit Range/Performance.
Common causes: Common causes include Faulty Downshift Switch, Downshift Switch harness is open or shorted, Downshift 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 3,268

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 P2779 Dodge Description

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

OBDII Code P2779 Dodge - Downshift Switch Circuit Range/Performance - AutoCodes.com — P2779 Dodge Code - Downshift Switch Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2779 Dodge?

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

How to Fix the DTC P2779 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 P2779 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 P2779 Dodge Code

1. What does the OBD-II code P2779 mean for a Dodge vehicle?

The P2779 code indicates an issue with the Downshift Switch Circuit, specifically a range or performance problem, which affects the transmissionâ€™s ability to downshift properly.

2. What are the common symptoms of a P2779 code in a Dodge?

Symptoms may include difficulty downshifting, erratic shifting, the transmission staying in higher gears, reduced fuel efficiency, and the check engine light illuminating.

3. What causes the P2779 code to appear on a Dodge?

Common causes include a faulty downshift switch, damaged or corroded wiring or connectors in the circuit, a malfunctioning transmission control module (TCM), or issues with the transmission itself.

4. Can I still drive my Dodge with a P2779 code?

While the vehicle may still be drivable, ignoring the issue can lead to further transmission problems or reduced performance, so itâ€™s best to address it as soon as possible.

5. How is a P2779 code diagnosed in a Dodge?

Diagnosis typically involves using an OBD-II scanner to confirm the code, inspecting the downshift switch and its wiring, testing the circuit for continuity, and checking the TCM for proper operation.

6. How do I fix the P2779 code on my Dodge?

Repairs may include replacing the downshift switch, repairing damaged wiring or connectors, updating or reprogramming the TCM, or addressing any underlying mechanical transmission issues.

7. How much does it cost to repair a P2779 code on a Dodge?

Repair costs vary but can range from $100 to $300 for switch replacement or wiring repairs. More extensive issues, such as TCM replacement, may cost significantly more.

8. Can a faulty downshift switch cause other transmission problems?

Yes, a malfunctioning downshift switch can lead to improper gear changes, increased wear on the transmission, and potential long-term damage if not repaired.

9. Will clearing the P2779 code with an OBD-II scanner fix the issue?

Clearing the code will reset the check engine light temporarily, but the underlying issue causing the P2779 code must be repaired to prevent it from returning.

10. Can a P2779 code trigger limp mode in a Dodge?

Yes, in some cases, the vehicleâ€™s transmission control module may enter limp mode to protect the transmission, limiting gear use and performance until the issue is resolved.