P0870
Transmission Fluid Pressure Sensor/Switch C Circuit
P0870 is an OBD-II diagnostic trouble code meaning: Transmission Fluid Pressure Sensor/Switch C Circuit. Common causes: open or short circuit in the sensor circuit, faulty transmission fluid pressure sensor. Estimated repair cost: $17–56.
Symptoms
- Incorrect gear shifting
- Hard gear shifts
- Transmission transition to emergency mode
- Increased fuel consumption
- Check Engine Light Is On
Causes
- Open or short circuit in the sensor circuit
- Faulty transmission fluid pressure sensor
- Poor connection in connectors
- Faulty Transmission Control Module (TCM)
- Contaminated or low transmission fluid level
How to Fix
- Check the level and condition of the transmission fluid
- Visually inspect the sensor wiring harness and connectors
- Check the resistance of the fluid pressure sensor
- Check sensor signals using an oscilloscope or multimeter
- Replace transmission fluid pressure sensor if necessary
Related codes
Error P0870 by Vehicle Brand
FAQ
What does the P0870 code mean?
P0870 is an OBD-II diagnostic trouble code that indicates: Transmission Fluid Pressure Sensor/Switch C Circuit
What causes a P0870 error code?
The most common causes of P0870 include: Open or short circuit in the sensor circuit; Faulty transmission fluid pressure sensor; Poor connection in connectors; Faulty Transmission Control Module (TCM).
How do I fix a P0870 diagnostic trouble code?
To fix P0870: Check the level and condition of the transmission fluid. Visually inspect the sensor wiring harness and connectors. Check the resistance of the fluid pressure sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0870?
Limited driving only, diagnose soon
How much does it cost to fix P0870?
The estimated repair cost for P0870 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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