P0740moderate severityPowertrain
Torque Converter Clutch Circuit Malfunction
on 2015 Kia Forte 1.8L I4 · FWD
What this code means
Malfunction in the torque converter clutch (TCC) solenoid circuit.
Symptoms
- Check Engine Light
- No lockup feel (higher RPM at highway)
- Poor fuel economy
- Transmission overheating
Common causes
- Faulty TCC solenoid
- Wiring issue
- PCM driver failure
- Torque converter failure
Diagnostic steps
- Test TCC solenoid resistance
- Check wiring
- Command TCC engagement with scan tool
- Monitor RPM drop during lockup command
Repair notes
Replace TCC solenoid or repair wiring. Solenoid is often inside transmission.
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Other Powertrain codes on this vehicle
P0001
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P0002
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P0003
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P0004
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P0010
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P0011
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P0012
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P0013
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P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1