P1747 – OBD-II DTC

OBD-II DTC P1747 – Torque Converter Clutch Solenoid Failed On

DTC P1747 meaning

DTC P1747 indicates that the Torque Converter Clutch (TCC) solenoid has failed to engage or is stuck in the “on” position. The TCC solenoid is responsible for controlling the engagement of the torque converter clutch, which helps improve fuel efficiency by locking the engine and transmission together at higher speeds. When this solenoid fails, it can lead to various performance issues in the vehicle.

DTC P1747 symptoms

Common symptoms associated with DTC P1747 include:

• Engine stalling or rough idling
• Increased engine RPMs during cruising
• Poor fuel economy
• Transmission slipping or harsh shifting
• Overheating of the transmission
• Check Engine Light illuminated

DTC P1747 causes

The causes of DTC P1747 can vary, but common issues include:

• Faulty torque converter clutch solenoid
• Wiring issues or damaged connectors related to the solenoid
• Low transmission fluid levels or dirty fluid
• Faulty transmission control module (TCM)
• Mechanical issues within the transmission

DTC P1747 seriousness

DTC P1747 can be serious as it affects the vehicle’s transmission performance and fuel efficiency. If left unaddressed, it may lead to further transmission damage, increased wear on engine components, and potentially unsafe driving conditions. It is advisable to diagnose and repair the issue promptly.

How to diagnose DTC P1747

To diagnose DTC P1747, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P1747.
2. Inspect the transmission fluid level and condition.
3. Check the wiring and connectors for the TCC solenoid for any signs of damage or corrosion.
4. Test the TCC solenoid for proper operation using a multimeter.
5. Examine the transmission control module for any faults or issues.
6. Perform a road test to observe the vehicle’s behavior under various driving conditions.

How to fix DTC P1747 step-by-step instructions

To fix DTC P1747, follow these steps:

1. Address any low or dirty transmission fluid by changing the fluid and filter.
2. Repair or replace any damaged wiring or connectors related to the TCC solenoid.
3. If the TCC solenoid is faulty, replace it with a new one.
4. Check and, if necessary, reprogram or replace the transmission control module.
5. Clear the DTC using an OBD-II scanner and perform a road test to ensure the issue is resolved.

How to erase DTC P1747

To erase DTC P1747, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the check engine light is off.

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