P1740 fault code: what it means

P1740: DSG clutch temperature fault. Limp mode and the clutches may overheat; check G509 and G182 wiring.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

wiring fault at clutch temp sensor (G509)
faulty clutch temp sensor
overheated clutch pack

P1740 by make

Audi

DSG clutch temperature fault. Limp mode and the clutches may overheat; check G509 and G182 wiring.

Usual causes: wiring fault at clutch temp sensor (G509); faulty clutch temp sensor; overheated clutch pack

Honda

Problem in 4th clutch pressure switch circuit.

Usual causes: 4th clutch pressure switch; wiring fault

Mitsubishi

CVT lock-up/select switching solenoid valve fault. Engagement or lock-up may be wrong.

Usual causes: lock-up/select switching solenoid; valve body; wiring fault

Nissan

CVT lock-up select solenoid valve fault. This valve switches pressure between lock-up and forward clutch, so engagement or lock-up may be wrong.

Usual causes: lock-up select solenoid valve; valve body fault; wiring or connector fault

Skoda

DSG clutch temperature fault. Limp mode and the clutches may overheat; check G509 and G182 wiring.

Usual causes: wiring fault at clutch temp sensor (G509); faulty clutch temp sensor; overheated clutch pack

Volkswagen

DSG clutch temperature fault. Limp mode and the clutches may overheat; check G509 and G182 wiring.

Usual causes: wiring fault at clutch temp sensor (G509); faulty clutch temp sensor; overheated clutch pack

What the repair usually costs

Automatic transmission rebuild, 6-speed and up (sent to specialist)NZ$7,190–NZ$13,080 · A$6,190–A$11,830
DSG / dual-clutch mechatronic unit replacement (new or reman)NZ$4,300–NZ$7,160 · A$3,750–A$6,390
DSG mechatronic repair / rebuild (unit sent to specialist)NZ$2,070–NZ$4,800 · A$1,890–A$4,250
DSG dry dual-clutch pack replacement (DQ200 7-speed)NZ$1,620–NZ$2,970 · A$1,600–A$2,880

Not sure what P1740 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.