Powertrain
generic / SAE
P0871
Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance
The transmission fluid pressure sensor/switch C reports a circuit range/performance fault. Hydraulic pressure feedback for shift control is unreliable on this channel.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 71
Possible causes
- Sensor offset drifted high
- Aerated fluid affects pressure medium
- Sensor element aged beyond calibration window low
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1000 €
- Estimated time: 1–4 h
- Component: tfp sensor c
- Component: wiring harness
- Component: tcm
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012