The P0872: Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit Low fault code indicates that the transmission fluid pressure sensor or switch ‘C’ is detecting lower-than-expected voltage. This can result in poor transmission performance and shifting issues. The problem may be caused by a faulty sensor, wiring issues, or a malfunctioning transmission control module (TCM).
P0872 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0872: Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit Low |
| Is it serious? | Yes, it can lead to improper transmission performance and shifting problems. |
| Possible causes | – Low voltage in the transmission fluid pressure sensor/switch ‘C’ circuit – Faulty sensor or wiring – Faulty transmission control module (TCM) |
| How to diagnose? | – Test the circuit for low voltage – Inspect wiring and connectors – Replace faulty components if needed |
P0872 Meaning
The P0872: Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit Low code indicates that the voltage in the circuit related to transmission fluid pressure sensor/switch ‘C’ is below the required range. This can prevent the sensor from properly monitoring fluid pressure, causing transmission shifting issues and erratic behavior.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes that may provide further insight into the issue. | OBD-II Scanner |
| Test the Circuit for Low Voltage | Use a multimeter to test the voltage in the transmission fluid pressure sensor/switch ‘C’ circuit and ensure it is within manufacturer specifications. | Multimeter |
| Inspect the Sensor and Wiring | Visually inspect the sensor and wiring for signs of damage, wear, or loose connections. Replace or repair faulty wiring as needed. | Flashlight, Multimeter |
| Test Transmission Control Module (TCM) | Use a diagnostic tool to check the functionality of the TCM and ensure it is properly communicating with the sensor. | Diagnostic Tool |
| Replace Faulty Components | If the sensor, wiring, or TCM is faulty, replace the necessary components to restore proper transmission fluid pressure monitoring. | Replacement Parts, Basic Tools |
| Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and test the vehicle to ensure normal transmission operation. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the system to confirm that the P0872 code does not return. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko