Engine-Codes.com
Engine-Codes – Chevrolet – P1779 Chevrolet

P1779 Chevrolet Code - Engine Torque Delivered To TCM Signal

Quick Answer

The P1779 code for Chevrolet vehicles indicates a problem with the Engine Torque Delivered To TCM Signal. Common causes include Faulty engine torque sensor, Wiring or connector issues, Malfunctioning TCM. 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 Chevrolet indicates Engine Torque Delivered To TCM Signal.
Common causes
Common causes include Faulty engine torque sensor, Wiring or connector issues, Malfunctioning TCM.
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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1779 Chevrolet Description

The P1779 code for Chevrolet vehicles indicates a problem with the Engine Torque Delivered To TCM Signal. The Transmission Control Module (TCM) relies on the engine torque signal to determine the appropriate shift points and adjust the transmission accordingly. When this signal is not functioning correctly, it can lead to various issues with the vehicle's performance and drivability.

OBDII Code P1779 Chevrolet - Engine Torque Delivered To TCM Signal
P1779 Chevrolet Code - Engine Torque Delivered To TCM Signal

Common Causes of P1779 Chevrolet

  1. Faulty engine torque sensor
  2. Wiring or connector issues
  3. Malfunctioning TCM
  4. Engine performance problems
  5. Software or programming issues

Symptoms of P1779 Chevrolet

  1. Erratic shifting behavior
  2. Harsh or delayed gear changes
  3. Transmission slipping
  4. Decreased fuel efficiency
  5. Check Engine Light illuminated

How to Fix P1779 Chevrolet

  1. Diagnose the issue using a scan tool to verify the P1779 code and identify the root cause.
  2. Inspect the engine torque sensor and related wiring for any signs of damage or corrosion.
  3. Test the TCM for proper functionality and address any issues found.
  4. Clear the code and perform a test drive to ensure the problem has been resolved.
  5. If necessary, reprogram the TCM or replace any faulty components to fix the issue.

Cost to Fix P1779 Chevrolet

The typical repair costs for addressing a P1779 code can range from $200 to $500, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate.

What does this mean?

Tech Notes for P1779 Chevrolet









User Submitted Video

Need more information about the P1779 Chevrolet code?

Need more information on how to fix the P1779 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1779 Chevrolet 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 Chevrolet Code

1. What are the common symptoms of OBDII code P1779 in a Chevrolet related to the Engine Torque Delivered To TCM Signal?

- Common symptoms include harsh shifting, transmission slipping, reduced fuel efficiency, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P1779 in a Chevrolet?

- The code P1779 in a Chevrolet may be caused by issues such as a faulty torque converter, damaged wiring or connectors, low transmission fluid levels, or a malfunctioning transmission control module (TCM).

3. How can I diagnose the OBDII code P1779 in a Chevrolet?

- Diagnosing the code P1779 involves using an OBDII scanner to retrieve the fault codes, performing a visual inspection of the transmission system, checking the transmission fluid level and condition, and conducting a thorough check of the wiring and connectors.

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

- It is not recommended to continue driving your Chevrolet with the code P1779 present, as it can lead to further damage to the transmission system and potentially cause safety issues.

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

- Repair tips for resolving the code P1779 may include checking and topping up the transmission fluid, inspecting and repairing any damaged wiring or connectors, replacing a faulty torque converter, or recalibrating the TCM.

6. How much does it typically cost to repair OBDII code P1779 in a Chevrolet?

- The cost of repairing the OBDII code P1779 in a Chevrolet can vary depending on the specific underlying issue, but it may range from a few hundred dollars for minor repairs to over a thousand dollars for more extensive repairs or component replacements.

7. Can I reset the OBDII code P1779 in a Chevrolet myself?

- While you can clear the code with an OBDII scanner, it is recommended to diagnose and fix the underlying issue causing the code before clearing it. If the problem persists after clearing the code, it may return and require further attention.

8. How urgent is it to address OBDII code P1779 in a Chevrolet?

- It is important to address the OBDII code P1779 in a Chevrolet promptly to prevent potential damage to the transmission system and ensure the safe operation of the vehicle.

9. Are there any recalls or technical service bulletins related to OBDII code P1779 in Chevrolet vehicles?

- It is advisable to check with a Chevrolet dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to the code P1779 in your specific Chevrolet model.

10. Can a DIY enthusiast fix OBDII code P1779 in a Chevrolet?

- Depending on the level of expertise and access to tools, a DIY enthusiast may be able to address simpler causes of the code P1779, such as checking and topping up the transmission fluid or inspecting wiring connections. However, more complex issues may require professional diagnosis and repair.

Discuss the causes and fixes for P1779 Chevrolet OBDII Code

Submit a New Comment

Code P1779 Chevrolet comments

No comments found for this page.