P1746 fault code: what it means

P1746: Gearbox solenoid power relay fault. PRND may flash and the gearbox goes into limp mode.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

low voltage at the gearbox module
gearbox control module internal fault

P1746 by make

Audi

Gearbox solenoid power relay fault. PRND may flash and the gearbox goes into limp mode.

Usual causes: low voltage at the gearbox module; gearbox control module internal fault

Skoda

Gearbox solenoid power relay fault. PRND may flash and the gearbox goes into limp mode.

Usual causes: low voltage at the gearbox module; gearbox control module internal fault

Volkswagen

Gearbox solenoid power relay fault. PRND may flash and the gearbox goes into limp mode.

Usual causes: low voltage at the gearbox module; gearbox control module internal fault

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
Alternator replace (small / medium car, petrol)NZ$510–NZ$1,020 · A$480–A$1,000

Not sure what P1746 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.