What is P0871 : Engine Error code Causes Explained
The P0871 engine trouble code indicates abnormal transmission fluid pressure sensor data. This issue frequently indicates sensor, electrical, or transmission issues. Understanding its sources prevents major damage and ensures vehicle reliability.
How to Identify a DTCs Number
Understand, this trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
To identify a DTC’s number like P0871, you need to connect an OBD-II scanner to the vehicle’s diagnostic port, allow it to read stored codes, and then match the displayed code with the corresponding fault description.
Causes of P0871 Error Code:
- Failed Transmission Fluid Pressure Sensor/Switch (TFPS):
The TFPS monitors fluid pressure; a faulty sensor can trigger the P0871 code. - Open or Short in the Signal Circuit:
A break or short in the TFPS wiring to the PCM can trigger the code. - Low Transmission Fluid:
Insufficient fluid levels can lead to pressure issues and the P0871 code. - Internal Transmission Problems:
Transmission issues like a sticking valve, faulty pump, or line restrictions can trigger the code. - Failed PCM:
In rare cases, a faulty PCM can also lead to this code, although this is less common.
Risk Level of P0871 Error Code:
The engine error code P0871 indicates a transmission fluid pressure sensor or switch “C” circuit range/performance issue, and its risk level is considered high because it directly affects gear shifting and transmission performance.
Immediate inspection and repairs are strongly recommended to prevent further damage and ensure vehicle safety.
Common Car Brands Affected by P0871 Code:
The P0871 code can affect various vehicles; it is most commonly associated with:
- Ford
- Mazda
- Nissan
- GM Vehicles
- GMC
- Dodge
- Honda
- Jeep
Video: P0871 Engine Error code
FAQ’s
What is P0871 Engine Error Code?
P0871 refers to a Transmission Fluid Pressure Sensor/Switch “C” Circuit Range/Performance issue, meaning the sensor is sending abnormal readings to the transmission control module.
What causes the P0871 Engine Error Code?
This error is usually caused by faulty transmission fluid pressure sensors, low or contaminated transmission fluid, failed PCM, or a failing transmission control module.
What is the Risk Level of P0871 Engine Error Code?
The risk level of this code is High, since it can cause erratic shifting, transmission overheating, and potential long-term damage if ignored.
Which vehicles are affected by P0871 Engine Error Code?
It commonly affects vehicles with automatic transmissions, including models from Chrysler, Dodge, Ford, Mazda, Nissan, GM Vehicles, and other manufacturers that use electronic pressure sensors.