P0744 fault code: what it means

P0744: Torque converter lock-up clutch acting intermittently; often felt as shudder or flare at cruise.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

lock-up solenoid / valve body fault
worn or degraded CVT fluid
worn torque converter clutch

P0744 by make

Mitsubishi

Torque converter lock-up clutch acting intermittently; often felt as shudder or flare at cruise.

Usual causes: lock-up solenoid / valve body fault; worn or degraded CVT fluid; worn torque converter clutch

Nissan

Torque converter lock-up clutch slipping or acting intermittently. Very common on Nissan CVTs; often felt as shudder or flare at cruise.

Usual causes: CVT valve body / torque converter clutch solenoid sticking or leaking; low, worn or wrong CVT fluid; torque converter clutch wear; internal CVT wear (metal in the fluid)

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
Torque converter replacement (auto / CVT, gearbox out)NZ$1,410–NZ$3,110 · A$1,390–A$3,040
CVT fluid service (car)NZ$250–NZ$580 · A$250–A$550
CVT fluid and filter service (SUV / Subaru / X-Trail)NZ$420–NZ$880 · A$400–A$830

Not sure what P0744 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.