OBD-II code · Powertrain (generic)
P0870 Transmission Fluid Pressure Sensor/Switch C Circuit
Electrical fault on the transmission fluid pressure sensor C circuit. Sensor C typically monitors a third hydraulic clutch or band line.
Is it safe to drive with P0870?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
- PossibleWiring fault
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
- Transmission Fluid Pressure Sensor C, Wiring Harness
Related codes
- P083ATransmission Fluid Pressure Sensor/Switch G Circuit
- P0845Transmission Fluid Pressure Sensor/Switch B Circuit
- P084ATransmission Fluid Pressure Sensor/Switch H Circuit
- P0875Transmission Fluid Pressure Sensor/Switch D Circuit
- P0987Transmission Fluid Pressure Sensor/Switch E Circuit
- P0992Transmission Fluid Pressure Sensor/Switch F Circuit
- P086DNeutral Position Sensor A Circuit High
- P086ENeutral Position Sensor A Circuit Intermittent/Erratic
- P086FNeutral Position Sensor A Not Learned
- P0871Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance
- P0872Transmission Fluid Pressure Sensor/Switch C Circuit Low
- P0873Transmission Fluid Pressure Sensor/Switch C Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.