P0841: Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance
Severity: medium
What it means: The transmission computer sees a reading from transmission fluid pressure sensor A that doesn't match what it expects.
Safe to drive? Usually drivable to a shop, but the transmission may shift poorly or limit power. Get it checked soon.
Common symptoms
- Check engine light
- Harsh shifts, shudder or reduced power
- Transmission warning on some cars
Likely causes, ranked
- Faulty pressure sensorShop
- Low or worn fluidShop
- Internal transmission faultShop
- Wiring or connector problemShop
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Vehicle-specific notes
- 2017–2019 Nissan Rogue Sport: On the Rogue Sport Forum, a 2017 owner at 89,000 miles got P0841 and was told by the dealer he needed a new CVT. Nissan's bulletin NTB18-077b says it doesn't apply when P0841 is stored. Read the full answer · Source
What it means: The transmission computer sees a reading from transmission fluid pressure sensor A that doesn't match what it expects.
Severity: Medium. Safe to drive? Usually drivable to a shop, but the transmission may shift poorly or limit power. Get it checked soon.
DIY or shop?
Shop. It needs a scan tool and transmission testing.
Before you replace parts
- Read all stored codes and freeze-frame data.
- Check the transmission fluid level, condition and type.
- Check your VIN for bulletins and CVT warranty coverage.
- Get a second opinion before replacing the transmission.
Safety / mechanic note
Verify with a mechanic. Poor shifting or reduced power can be risky in traffic. A code points to a circuit or system, not always a specific part.
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