OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0871?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor offset drifted
- PossibleAerated fluid affects pressure
- Less likelySensor element aged beyond calibration window
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Tfp Sensor C, Wiring Harness, Tcm
Related codes
- P083BTransmission Fluid Pressure Sensor/Switch G Circuit Range/Performance
- P0840Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance
- P0841Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance
- P0846Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance
- P084BTransmission Fluid Pressure Sensor/Switch H Circuit Range/Performance
- P0876Transmission Fluid Pressure Sensor/Switch D Circuit Range/Performance
- P0988Transmission Fluid Pressure Sensor/Switch E Circuit Range/Performance
- P0993Transmission Fluid Pressure Sensor/Switch F Circuit Range/Performance
- P086ENeutral Position Sensor A Circuit Intermittent/Erratic
- P086FNeutral Position Sensor A Not Learned
- P0870Transmission Fluid Pressure Sensor/Switch C Circuit
- P0872Transmission Fluid Pressure Sensor/Switch C Circuit Low
- P0873Transmission Fluid Pressure Sensor/Switch C Circuit High
- P0874Transmission Fluid Pressure Sensor/Switch C Circuit Intermittent
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.