p0872 transmission fluid pressure sensor switch c circuit low 2
P0872 – Transmission Fluid Pressure Sensor Switch C Circuit Low
Description: The transmission fluid pressure sensor/switch “C” circuit is experiencing a low voltage condition.
Definition: This code indicates that the powertrain control module (PCM) has detected a problem with the transmission fluid pressure sensor switch C, specifically that the circuit is reading lower than expected. This could be due to electrical issues such as damaged wiring or connectors, or a faulty sensor.
p0872 – Transmission Fluid Pressure Sensor/Switch “C” Circuit Low
Severity: Moderate
Common Causes
p0872 – Transmission Fluid Pressure Sensor/Switch C Circuit Low
Common causes:
- Faulty transmission fluid pressure sensor/switch
- Low transmission fluid level
- Dirty or contaminated transmission fluid
- Wiring issues such as short circuits or open circuits
- Faulty engine control module (ECM)
Common Misdiagnosis
OBD2 Code: P0872
Description: Transmission Fluid Pressure Sensor/Switch C Circuit Low
Common Misdiagnosis: Replacing the transmission fluid pressure sensor/switch without checking for wiring issues or connector problems.
Common Diagnostic Steps
OBD2 Code: P0872
Description: Transmission Fluid Pressure Sensor/Switch C Circuit Low
- Check the transmission fluid level and condition. Ensure it is at the correct level and not contaminated.
- Inspect the wiring and connectors related to the transmission fluid pressure sensor/switch for any signs of damage, corrosion, or disconnection.
- Test the voltage and ground signals at the transmission fluid pressure sensor/switch using a multimeter to ensure they are within specifications.
- Perform a continuity test on the circuit between the transmission control module (TCM) and the sensor/switch to check for open or short circuits.
- If applicable, use an OBD2 scanner to monitor live data from the transmission fluid pressure sensor/switch to verify its operation under various conditions.
- Replace the transmission fluid pressure sensor/switch if it is found to be faulty after testing.
- If all else fails, consider inspecting or replacing the TCM as a last resort after ruling out other potential issues.