The P0C1F: Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit High fault code indicates that the temperature sensor within the auxiliary transmission fluid pump control module is reporting a higher-than-expected temperature reading. This can be caused by a faulty sensor, issues with the sensor circuit, or wiring problems. Incorrect temperature readings can affect the operation of the transmission fluid pump and the overall transmission system.
P0C1F – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0C1F: Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit High |
| Is it serious? | Yes, high sensor readings can lead to incorrect system operation, affecting cooling and pump performance. |
| Possible causes | – High temperature reading from the sensor – Faulty sensor or circuit issues – Wiring problems |
| How to diagnose? | – Measure the temperature sensor reading – Test the sensor and circuit – Inspect wiring and connections |
P0C1F Meaning
The P0C1F code indicates that the temperature sensor inside the auxiliary transmission fluid pump control module is providing a reading that is higher than the expected range. This could result from a malfunctioning sensor, problems with the wiring, or issues with the sensor circuit. High temperature readings could trigger improper operation of the transmission fluid pump, potentially leading to overheating or transmission issues.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes related to sensor performance or transmission fluid pump operation. | OBD-II Scanner |
| Measure the Temperature Sensor Reading | Use a multimeter or diagnostic tool to measure the output of the temperature sensor and compare it to the manufacturer’s specifications. | Multimeter, Diagnostic Tool |
| Test the Temperature Sensor | Test the temperature sensor to ensure it is functioning within the expected range. Replace the sensor if the readings are significantly higher than specified. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connections | Visually inspect the wiring and connections for any damage, corrosion, or loose connections that could cause the sensor to report high readings. | Flashlight, Multimeter, Wiring Diagram |
| Test the Sensor Circuit | If the sensor is functioning correctly, test the sensor circuit for voltage or continuity issues that may lead to incorrect sensor readings. | Multimeter, Diagnostic Tool |
| Clear the Code and Test Drive | After repairs or replacements, clear the fault code using an OBD-II scanner and conduct a test drive to confirm the sensor is working properly. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the system to ensure that the P0C1F code does not return. | OBD-II Scanner |
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Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)