OBD code P0870 indicates a fault with the Transmission Fluid Pressure Sensor/Switch ‘C’.
This affects the transmission system.
Symptoms include the Engine Light being ON.
The issue is typically caused by a faulty sensor, wiring harness issues, or poor electrical connections.
It is a moderate concern.
To fix, inspect the sensor, wiring harness, and connectors for any damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the p0870 OBD Code
The vehicle may experience shifting issues or lack of engagement when fault code P0870 is present.
- Symptoms: Engine Light ON.
- Possible harsh shifting from the transmission.
- Vehicle may go into limp mode.
- Transmission may not shift properly.
Do you know you can clear most fault codes—but some could mean serious danger? Don’t take chances with your safety or your family’s safety. This budget-friendly car scanner makes it easy to clear fault codes in seconds while showing you exactly what’s wrong. Plug it in, connect to your Android or iOS phone, and instantly check live data. You’ll know if it’s a minor issue you can clear or something serious that needs attention—so you can drive safely and stress-free. (Today’s Deal)
Causes of the p0870 OBD Code
Possible reasons for fault code P0870 include issues with the transmission fluid pressure sensor or wiring.
- Causes: Faulty Transmission Fluid Pressure Sensor/Switch ‘C’.
- Transmission Fluid Pressure Sensor/Switch ‘C’ harness is open or shorted.
- Transmission Fluid Pressure Sensor/Switch ‘C’ circuit poor electrical connection.
Fixing Error Code p0870 Step By Step
Address the issue by inspecting the transmission fluid pressure sensor circuit for fault code P0870.
- To fix OBDII code P0870, first, review the possible causes related to the transmission fluid pressure sensor switch ‘C’ circuit.
- Visually inspect the wiring harness and connectors for any damage.
- Check the connector pins for signs of being broken, bent, pushed out, or corroded.
- Repair or replace any damaged components found during the inspection.
- Clear the fault codes and test drive the vehicle to verify if the issue has been resolved.
- If the code returns, consider replacing the transmission fluid pressure sensor switch or performing a software update on the vehicle’s control module as necessary.
Cost Of Fixing p0870 Fault Code
Diagnosing and repairing fault code P0870 typically involves inspecting and servicing the transmission fluid pressure.
The cost to diagnose and fix OBD code P0870 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
The total cost depends on labor rates, shop fees, and the complexity of the transmission pressure switch solenoid E circuit issue.
That fault code is a turning point. If repair costs are climbing and your current loan feels like it’s holding you back, this is the time to plan ahead. The free Car Loan Payment Tracker helps you see how quickly you can pay off what’s left—and start preparing, with confidence, for your dream car.
Details of the p0870 OBD Code
P0870 indicates a transmission fluid pressure sensor circuit malfunction in the vehicle.
OBD code P0870 means Transmission Fluid Pressure Sensor/Switch C Circuit.
This code is triggered when the Powertrain Control Module (PCM) detects an electrical fault in the transmission fluid pressure sensor/switch C circuit.
The sensor/switch C is typically located within the transmission valve body and is responsible for monitoring hydraulic pressure in the transmission.
When this code is set, it indicates a problem with the electrical circuit associated with the transmission fluid pressure sensor/switch C.
This could be due to issues such as a faulty sensor/switch, damaged wiring, or a poor electrical connection.
Proper diagnosis with a scan tool capable of reading transmission codes and a multimeter for electrical testing is necessary to pinpoint the exact cause of the fault.
Mechanic’s Tech Notes
Code P0870 relates to a transmission fluid pressure sensor circuit issue in the transmission.
To diagnose and fix OBDII code P0870, start by checking the transmission control module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) using a scan tool.
If the TCM does not respond, reprogramming or reflashing may be necessary.
Visually inspect the wiring harness and connectors for any damage, and ensure connector pins are not broken, bent, pushed out, or corroded.
Address any issues found during the inspection to resolve the P0870 code.
FAQ
Common symptoms of OBD code P0870 include Engine Light ON, caused by issues with the Transmission Fluid Pressure Sensor/Switch ‘C’ or related wiring. Fix: Inspect and repair sensor and wiring.
OBD code P0870 is typically caused by a faulty Transmission Fluid Pressure Sensor/Switch ‘C’, open/shorted harness, or poor electrical connection. Inspect and repair as needed.
Diagnose and repair OBD code P0870 by checking Transmission Fluid Pressure Sensor/Switch ‘C’, its harness, and connectors for faults. Inspect and repair as needed.
Wrap Up
If your transmission is slipping, shifting harshly, or showing OBDII code P0870, it may be caused by a faulty transmission fluid pressure sensor, low transmission fluid level, or issues with the transmission fluid pressure sensor circuit.
To address OBDII code P0870, check the transmission fluid level and condition, inspect the wiring and connectors related to the transmission fluid pressure sensor, and test the sensor for proper operation.
Replace the sensor if necessary and ensure all connections are secure to resolve the issue.
