AutoCodes – GMC – P1814 GMC

P1814 GMC Code - Torque Converter Overstressed

Quick Answer

When the transmission not in Park/Neutral (P/N), Vehicle Speed Sensor (VSS) input at 5 mph or less, Torque Converter Clutch (TCC) slip speed over 1500 rpm, the Powertrain Control Module (PCM) detects that the throttle angle was 79% or greater for 12 seconds in the test. Common causes include Faulty Torque Converter Clutch Solenoid, Torque Converter Clutch Solenoid harness is open or shorted, Torque Converter Clutch Solenoid 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
P1814 GMC indicates Torque Converter Overstressed.
Common causes
Common causes include Faulty Torque Converter Clutch Solenoid, Torque Converter Clutch Solenoid harness is open or shorted, Torque Converter Clutch Solenoid 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 1,404
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 20, 2019
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Code P1814 GMC Description

When the transmission not in Park/Neutral (P/N), Vehicle Speed Sensor (VSS) input at 5 mph or less, Torque Converter Clutch (TCC) slip speed over 1500 rpm, the Powertrain Control Module (PCM) detects that the throttle angle was 79% or greater for 12 seconds in the test.
OBDII Code P1814 GMC - Torque Converter Overstressed - AutoCodes.com
P1814 GMC Code - Torque Converter Overstressed

What are the Possible Causes of the DTC P1814 GMC?

  • Faulty Torque Converter Clutch Solenoid
  • Torque Converter Clutch Solenoid harness is open or shorted
  • Torque Converter Clutch Solenoid circuit poor electrical connection

How to Fix the DTC P1814 GMC?

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 P1814 GMC 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 P1814 GMC Code

1. What are the common symptoms of OBDII code P1814 GMC (Torque Converter Overstressed)?

- Common symptoms include harsh shifting, slipping transmission, reduced fuel efficiency, and illuminated Check Engine Light.

2. What can cause the OBDII code P1814 GMC to trigger?

- The code is typically triggered by an overstressed torque converter due to heavy loads, towing, or aggressive driving habits.

3. How serious is the OBDII code P1814 GMC (Torque Converter Overstressed)?

- This code should be addressed promptly to prevent further damage to the transmission and ensure safe vehicle operation.

4. Can driving with the OBDII code P1814 GMC present any risks?

- Continuing to drive with this code may lead to transmission overheating, increased wear and tear, and potential transmission failure.

5. How can I repair OBDII code P1814 GMC related to Torque Converter Overstressed?

- Repair options include checking and replacing the torque converter, addressing any underlying mechanical issues, and resetting the trouble code.

6. Is it safe to continue driving with the Check Engine Light on due to code P1814 GMC?

- It is not recommended to drive with the Check Engine Light on as it indicates a problem that needs attention to prevent further damage.

7. Can I reset the OBDII code P1814 GMC myself?

- The code can be reset using an OBDII scanner, but it is important to address the underlying cause to prevent the code from reoccurring.

8. How much does it typically cost to repair OBDII code P1814 GMC?

- The cost of repair can vary depending on the extent of the damage, parts needed, and labor rates, but it is advisable to seek professional diagnosis.

9. Are there any preventive measures to avoid triggering code P1814 GMC?

- To prevent the code from triggering, avoid excessive towing, heavy loads, and aggressive driving, and maintain regular transmission servicing.

10. Can code P1814 GMC be intermittent or permanent?

- The code can be intermittent if the issue is sporadic, but it is important to address it promptly to prevent further transmission damage.

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