All codes › P0740
P0740: Torque Converter Clutch Solenoid Circuit/Open
What it means
The torque converter clutch solenoid circuit is open or faulty.
Severity: Medium Converter won't lock up; higher RPM and heat on the highway.
Common causes
- Failed TCC solenoid
- Internal harness damage
- Connector fault
- TCM fault
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Rarely DIY. TCC solenoid is usually inside the transmission pan.
Repair cost
SEEDED ESTIMATE Roughly $190–$730
Most likely repair: transmission solenoid. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Transmission solenoid | $40 | $250 | Editorial placeholder, parts price not yet cited |
| Labor 1.5–3 hr | $150 | $480 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0740 are verified.
Verified reader invoices for P0740: 0. Share your repair bill to help build real costs.
Tools that can read P0740
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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