P0740

Torque Converter Clutch Circuit Malfunction

Severity: Medium Transmission Generic OBD-II Code Est. Repair: $200 - $1,200

Schedule diagnosis soon. Continued driving may worsen the issue.

What Does P0740 Mean?

TCC solenoid or circuit fault.

Common Symptoms

CEL
Higher RPM at cruise
Possible shudder

Possible Causes

Faulty TCC solenoid
Wiring
Valve body
Fluid

How to Fix P0740 – Repair Guide

Check fluid
Test solenoid circuit
May require valve body or transmission work
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Recommended OBD2 Scanners & Tools

To read and clear this code yourself, you need a reliable OBD2 scanner. Here are top-rated options:

BlueDriver Bluetooth Pro OBDII Scan Tool

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ANCEL AD310 Classic Enhanced OBD2 Scanner

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FIXD Bluetooth OBD2 Scanner

Simple plug-and-play sensor that explains codes in plain English via free app. Ideal for first-time users.

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Disclaimer: Information is for educational reference only and does not replace professional diagnosis. Actual causes and costs vary by vehicle make, model, year and condition. Always verify with a qualified technician.