P0841 fault code: what it means

P0841: Transmission fluid pressure sensor / switch A reading is out of range.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

low transmission fluid
faulty pressure sensor or switch
valve body fault

P0841 by make

Audi

Transmission fluid pressure sensor signal does not make sense. On DSG7 it can mean lost odd gears (1-3-5-7) at times.

Usual causes: mechatronic unit / internal pressure sensor fault; low hydraulic pressure; wiring to the pressure sensor

Jeep

Transmission pressure switch A fault. On Jeep autos it is a clutch pressure switch rationality fault in the valve body.

Usual causes: low transmission fluid; faulty pressure switch / valve body; gearbox wiring

Mitsubishi

Transmission fluid pressure sensor range/performance.

Usual causes: low or degraded CVT fluid; faulty fluid pressure sensor; valve body fault; wiring or connector fault

Nissan

CVT fluid pressure sensor A range/performance: pulley pressure outside the expected value. On Nissan CVTs this often points to internal valve body or transaxle trouble.

Usual causes: CVT valve body fault; internal CVT wear (belt/pulley); old or wrong-grade CVT fluid; wiring or connector fault

Skoda

Transmission fluid pressure sensor signal does not make sense. On DSG7 it can mean lost odd gears (1-3-5-7) at times.

Usual causes: mechatronic unit / internal pressure sensor fault; low hydraulic pressure; wiring to the pressure sensor

Subaru

Transmission fluid pressure sensor range/performance. On Subaru Lineartronic CVTs (2010-2017 Legacy/Outback) usually the valve body.

Usual causes: faulty CVT valve body letting fluid aerate; low or wrong CVT fluid; faulty fluid pressure sensor or wiring

Volkswagen

Transmission fluid pressure sensor signal does not make sense. On DSG7 it can mean lost odd gears (1-3-5-7) at times.

Usual causes: mechatronic unit / internal pressure sensor fault; low hydraulic pressure; wiring to the pressure sensor

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
Parking sensor replace, one sensorNZ$130–NZ$520 · A$130–A$510
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

Not sure what P0841 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.