The P0874: Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit Intermittent fault code indicates that the transmission fluid pressure sensor or switch ‘C’ is experiencing intermittent issues. This can cause erratic transmission performance, shifting problems, or communication failures. Intermittent issues may be caused by faulty wiring, loose connections, or a malfunctioning transmission control module (TCM).
P0874 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0874: Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit Intermittent |
| Is it serious? | Yes, intermittent faults can lead to erratic shifting and transmission malfunctions. |
| Possible causes | – Intermittent issues with the transmission fluid pressure sensor/switch ‘C’ – Wiring or connector issues – Faulty transmission control module (TCM) |
| How to diagnose? | – Test for intermittent faults in the circuit – Inspect wiring and connectors – Replace faulty components if needed |
P0874 Meaning
The P0874: Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit Intermittent code indicates that the circuit connected to transmission fluid pressure sensor/switch ‘C’ is experiencing intermittent signal problems. These interruptions can cause erratic transmission behavior, leading to issues such as improper shifting and irregular transmission performance.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional related codes that might provide further insights into the issue. | OBD-II Scanner |
| Test for Intermittent Faults | Use a multimeter or diagnostic tool to check for intermittent voltage or signal issues in the circuit related to sensor/switch ‘C’. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connectors | Visually inspect the wiring and connectors for signs of damage, wear, corrosion, or loose connections. Repair or replace faulty components as needed. | Flashlight, Multimeter |
| Test Transmission Control Module (TCM) | Use a diagnostic tool to test the TCM for proper communication with the sensor and ensure it is functioning correctly. | Diagnostic Tool |
| Replace Faulty Components | If the sensor, wiring, or TCM is faulty, replace the necessary components to resolve the intermittent issue and restore proper transmission fluid pressure monitoring. | Replacement Parts, Basic Tools |
| Clear the Code and Test Drive | After 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 P0874 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