P0875 Transmission fluid pressure sensor/switch D circuit

P0875 – OBD-II Trouble Code Technical Description

Transmission Fluid Pressure Sensor/Switch D Circuit

What does the fault code mean P0875?

Code P0875 typically applies to many OBD-II equipped vehicles, but it most commonly occurs in Dodge/Chrysler/Jeep, General Motors, and Toyota vehicles. The transmission fluid pressure sensor/switch (TFPS) is typically mounted to the valve body inside the transmission. TFPS converts transmission fluid pressure into an electrical signal to the PCM or TCM that controls the transmission. This code sets when the signal does not correspond to normal operating voltage, which may be due to internal mechanical problems with the transmission. However, P0875 can be caused by either electrical or mechanical problems.

Corresponding transmission fluid pressure sensor codes:

P0876: Transmission Fluid Pressure Sensor/Switch “D” Circuit Range/Performance
P0877: Transmission Fluid Pressure Sensor/Switch “D” Circuit Low
P0878: Transmission Fluid Pressure Sensor/Switch “D” Circuit High
P0879: Transmission Fluid Pressure Sensor/Switch “D” Circuit – Intermittent

A transmission fluid pressure sensor is needed to determine whether there is sufficient hydraulic pressure within the transmission. Code P0875 indicates a problem with voltage from the TFPS sensor or internal mechanical components that affect the hydraulic pressure in the transmission.

Possible reasons

Code P0875 can occur for a variety of reasons, and its severity depends on the source of the problem. The most common reasons are:

1. Low level, contamination or leaking transmission fluid, such as lead.
2. Faulty transmission high pressure pump.
3. Defective temperature sensor.
4. Overheating of the engine.
5. Mechanical problems within the transmission.
6. A rare case is a faulty PCM (engine control module).

The severity of the problem depends on the cause. If the cause is low transmission fluid, simply adding or replacing it may correct the problem. If the problem is associated with more serious mechanical defects or malfunction of sensors and modules, then repairs may require more serious interventions.

For accurate diagnosis and repair, it is recommended that you contact a qualified auto mechanic.

What are the symptoms of a fault code? P0875?

Symptoms of a P0875 code may include overheated transmission fluid with a distinctive odor, smoke from the transmission area, lack of commitment or disengagement, and rough shifting or slippery gears. The severity of the problem depends on which circuit is failing. Since this is an electrical failure, the PCM/TCM can compensate to some extent by modifying the transmission's shifting if electronically controlled.

How to diagnose a fault code P0875?

When trouble code P0875 appears, it is important to start by checking the technical service bulletins (TSBs) associated with your specific vehicle. This can help identify known problems and solutions suggested by the manufacturer. The next thing to look at is the transmission fluid pressure switch/switch (TFPS), which is usually mounted to the side of the valve body inside the transmission or may be screwed into the side of the transmission housing. Inspect the appearance of the connector and wiring for damage, corrosion, or breaks. Clean the connector terminals and apply electrical grease to improve contact.

For further diagnosis, connect a digital voltmeter (DVOM) to the TFPS sensor connector to check the voltage and an ohmmeter to check the sensor resistance. Check that the values ​​comply with the manufacturer's specifications. If all of these steps do not resolve the problem, you may need to replace the TFPS sensor itself or check for internal mechanical problems in the transmission. Manufacturer TSB databases can also assist in this process.

Diagnostic errors

Common mistakes when diagnosing a P0875 trouble code may include skipping a check of the manufacturer's TSB database, not insufficiently checking the appearance of the TFPS sensor connector and wiring, and not correctly determining the cause of the fault without performing a full transmission diagnosis. Problems also often arise due to misinterpretation of voltage or resistance measurements, which can lead to an erroneous fault determination. It is important to perform all necessary tests and carefully analyze the results to ensure the exact cause of the P0875 code.

How serious is the fault code? P0875?

Trouble code P0875 indicates problems with the transmission fluid pressure sensor (TFPS) or other related components. Although this is not a critical fault, ignoring this code can lead to serious transmission problems. It is recommended that diagnostics and repairs be carried out immediately to avoid possible damage to the transmission and deterioration in its performance.

What repair will help eliminate the code? P0875?

To resolve trouble code P0875, you must perform the following steps:

1. Check the transmission fluid pressure sensor wiring and connectors for damage.
2. Check the transmission fluid pressure sensor for functionality and correct pressure measurement.
3. Clean and maintain connections and connectors, replace damaged elements if necessary.
4. Check the Transmission Control Module (TCM) or Engine Control Module (PCM) for possible problems and make any necessary replacement or repairs.
5. If necessary, replace the transmission fluid pressure sensor.

To more accurately determine the necessary repair actions, it is recommended to contact a qualified automotive diagnostician who can conduct a full diagnosis and determine the exact reasons for the appearance of this fault code.

What is P0875 Engine Code [Quick Guide]

P0875 – Brand-specific information

Trouble code P0875 can be interpreted differently for different car brands. Here are some examples of decodings for specific brands:

1. Dodge/Chrysler/Jeep: Transmission Fluid Pressure Sensor (TFPS) “D” – faulty or low signal
2. General Motors: Transmission Fluid Pressure Sensor (TFPS) “D” – Signal Low
3. Toyota: Transmission Fluid Pressure Sensor (TFPS) “D” – Low Signal

These are just some examples of the codes, and the codes may vary depending on the specific make and model of the car. For more accurate information, it is recommended to contact a dealer or service center that specializes in the specific brand of your car.