P0748 fault code: what it means

P0748: Pressure control solenoid A electrical/performance fault on the 6-speed automatic.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

worn valve body bores (A6MF)
faulty pressure control solenoid
wiring or connector fault
degraded transmission fluid

P0748 by make

Hyundai

Pressure control solenoid A electrical/performance fault on the 6-speed automatic.

Usual causes: worn valve body bores (A6MF); faulty pressure control solenoid; wiring or connector fault; degraded transmission fluid

Kia

Pressure control (linear) solenoid A electrical fault.

Usual causes: faulty linear/pressure control solenoid; valve body bore wear (A6); wiring or connector fault; low or dirty fluid

Mercedes-Benz

7G-Tronic pressure control solenoid A electrical fault; can cause harsh shifts or limp mode.

Usual causes: faulty solenoid (valve body); conductor plate fault; leaking 13-pin connector

What the repair usually costs

Automatic transmission fluid service, drain and refill (car)NZ$210–NZ$470 · A$210–A$450
Automatic transmission fluid service (SUV / ute / 4WD)NZ$300–NZ$680 · A$290–A$650
Automatic transmission service with pan / filter (European ZF / Mercedes)NZ$610–NZ$1,240 · A$570–A$1,160
CVT fluid service (car)NZ$250–NZ$580 · A$250–A$550

Not sure what P0748 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.