AutoCodes – Ford – P1779 Ford

P1779 Ford Code - Transmission Control Indicator Lamp Circuit Malfunction

Quick Answer

The Powertrain Control Module (PCM) monitors the Transmission Control Indicator Lamp. Common causes include Faulty Transmission Control Indicator Lamp, Transmission Control Indicator Lamp harness is open or shorted, Transmission Control Indicator Lamp 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: P1779 Ford indicates Transmission Control Indicator Lamp Circuit Malfunction.
Common causes: Common causes include Faulty Transmission Control Indicator Lamp, Transmission Control Indicator Lamp harness is open or shorted, Transmission Control Indicator Lamp 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 14,660

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 Jul 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1779 Ford Description

The Powertrain Control Module (PCM) monitors the Transmission Control Indicator Lamp. The Diagnostic Trouble Code (DTC) will set when the PCM has detected a malfunction in the Transmission Control Indicator Lamp Circuit.

OBDII Code P1779 Ford - Transmission Control Indicator Lamp Circuit Malfunction - AutoCodes.com — P1779 Ford Code - Transmission Control Indicator Lamp Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1779 Ford?

Faulty Transmission Control Indicator Lamp
Transmission Control Indicator Lamp harness is open or shorted
Transmission Control Indicator Lamp circuit poor electrical connection

How to Fix the DTC P1779 Ford?

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 P1779 Ford 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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Get the P1779 Ford code diagnosed by a professional: Find a repair shop in your area

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 P1779 Ford Code

1. What are the common symptoms of OBDII code P1779 in a Ford vehicle?

- Common symptoms include the transmission control indicator lamp (TCIL) illuminating on the dashboard, harsh shifting or erratic transmission behavior, and potential loss of power.

2. What are the possible causes of a Transmission Control Indicator Lamp Circuit Malfunction (P1779) in a Ford vehicle?

- The potential causes of this code may include a faulty transmission control module (TCM), damaged wiring or connectors in the TCIL circuit, or a malfunctioning TCIL itself.

3. How can I diagnose OBDII code P1779 in my Ford vehicle?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, performing a visual inspection of the TCIL circuit, checking the TCM for any faults, and testing the wiring and connectors for continuity.

4. Can I continue driving my Ford vehicle with OBDII code P1779 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further transmission issues and potential safety hazards. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1779 in a Ford vehicle?

- Repair tips may include checking and repairing any damaged wiring or connectors in the TCIL circuit, replacing a faulty TCIL or TCM, and clearing the code with an OBDII scanner after completing repairs.

6. Is it possible to reset OBDII code P1779 in a Ford vehicle without fixing the underlying issue?

- While it is possible to clear the code temporarily, the underlying issue causing the TCIL circuit malfunction must be addressed to prevent the code from reappearing.

7. How much does it typically cost to repair OBDII code P1779 in a Ford vehicle?

- The cost of repairs for this code can vary depending on the specific issue causing the malfunction. It is advisable to consult a mechanic for an accurate diagnosis and cost estimate.

8. Can a DIY enthusiast fix OBDII code P1779 in a Ford vehicle, or is professional help recommended?

- Depending on your skill level and experience with automotive repairs, some DIY enthusiasts may be able to address this code themselves. However, seeking professional help is recommended for a proper diagnosis and repair.

9. Are there any preventative maintenance measures to avoid OBDII code P1779 in a Ford vehicle?

- Regularly inspecting and maintaining the transmission system, checking the wiring for signs of wear or damage, and addressing any related issues promptly can help prevent the occurrence of this code.

10. How long does it take to repair OBDII code P1779 in a Ford vehicle?

- The repair time can vary based on the specific cause of the code and the complexity of the repair. It is advisable to consult a mechanic for an estimated repair timeline.