What is the P0871 fault number? What is the description of the Transmission Oil Pressure Sensor/Switch “C” Circuit Range/Performance error code? How do I fix the P0871 fault code What are the causes and symptoms of the P0871 error code?
What is the P0871 Fault code? What does it signify?
The transmission control module (TCM), or powertrain control module, uses the transmission oil sensor/switch (TFPS), to determine hydraulic pressure while shifting. The TFPS sensor is typically located near the hydraulic control unit (valve-body / transmission computer) within the transmission. In some cases, it may be mounted near the transmission case.
The transmission oil-pressure sensor converts the oil pressure into an electronic signal. The sensor’s voltage signal will change if the oil level rises. This information is shared to the PCM/TCM in order to monitor the transmission operating temperature and perform the shifting process.
The PCM periodically checks the transmission oil pressure sensor signals and compares them to the parameters in its memory. If the voltage signal coming from the “C” input circuit of the sensor is outside the range predetermined by the manufacturer, the fault code P0871 is triggered. For more information, consult your vehicle’s specific repair manual.
Problems with the electrical circuit of a sensor are usually responsible for P0871. Setting the code can result in transmission oil leaks or cracks in the transmission hydraulic computer. Also, it could cause low system operating pressure and transmission oil loss. This can also be caused mechanical problems.
There are many vehicles that can be affected by the P0871 fault code, including, but not limited, to Chrysler, Jeep and Dodge models as well as Toyota, Honda, Toyota and Honda models.
What causes the P0871 Fault code?
Low transmission fluid levels are the leading cause of P0871. Low transmission fluid levels can cause code P0871 in older vehicles with higher mileage. Low fluid levels can indicate a leak, as transmission oil is not burned during combustion like oil. The leak can be seen if you look in areas where your car is frequently parked.
Below are some reasons to set fault code P0871:
- – Damaged wiring or loose connectors.
- – Sensor for oil pressure in transmissions that is defective
- – Transmission oil that is missing, dirty, or contaminated
- – Defective transmission high press pump
- – Defective transmission temp sensor
- – Engine overheating
- – Leakage of transmission oil from components or gaskets
- – Mechanical transmission malfunctions
- – Defective PCM / TCM (rarely)
What are the Symptoms of the P0871 Trouble Code
These symptoms may be present in vehicles with code P0871.
- – Illumination at the check engine lights
- – The transmission warning lamp has arrived
- – Transmission oil that has been heated
- – Oily odors emanating from the gearbox
- Smoke coming out of the gearbox
- – Incorrect shifting, or delayed shifting
- – Gearbox slipping
- Transmission oil leaks
- – PCM allows you to enter safe mode, lock the vehicle in 2nd and 3rd gears.
How do I fix the P0871 fault code?
The following repairs may be able to resolve the P0871 fault code:
- Repair of damaged wiring and connectors.
- – Replacing a defective transmission oil pressure sensor
- – Clean the transmission and replace the transmission fluid with the filter
- – Replacing an inoperable high-pressure transmission pump
- – Replacing a faulty temperature sensor for transmission
- – Repair of transmission oil leaked
- – Repair of mechanical transmission problems
- – Testing the PCM and TCM, and if necessary replacing them
How serious is the P0871 Fault code?
You should take P0871 seriously, as it may be caused either by a defective sensor or hydraulic pressure problems. To avoid transmission damage, it’s important to immediately diagnose the problem and address it.
