The P0712: Transmission Fluid Temperature Sensor A Circuit Low Input indicates that the transmission fluid temperature sensor A is reporting a signal that is too low. This may be caused by a faulty sensor, wiring problems, or poor connections, which can result in incorrect transmission fluid temperature readings.
P0712 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0712: Transmission Fluid Temperature Sensor A Circuit Low Input |
| Is it serious? | Yes, as incorrect fluid temperature readings can lead to overheating or improper transmission performance. |
| Possible causes | – Low input signal from transmission fluid temperature sensor A – Faulty sensor – Wiring issues |
| How to diagnose? | – Test the input signal from the sensor – Inspect wiring and connectors – Replace sensor if input is too low |
P0712 Meaning
The P0712 code is triggered when the transmission fluid temperature sensor A is sending a low input signal to the transmission control module (TCM). This sensor measures the temperature of the transmission fluid to help regulate transmission operation. A low input signal can result from a malfunctioning sensor, damaged wiring, or poor connections, leading to improper transmission control and potential overheating.
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 the transmission or temperature sensors, which may provide further insights. | OBD-II Scanner |
| Test the Input Signal from the Sensor | Use a multimeter or diagnostic tool to test the input signal from transmission fluid temperature sensor A. Compare the readings to the manufacturer’s specifications to verify if the signal is too low. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connectors | Inspect the wiring and connectors associated with the transmission fluid temperature sensor for signs of damage, loose connections, or corrosion. | Flashlight, Multimeter |
| Inspect Transmission Fluid Level | Ensure that the transmission fluid level is within the recommended range, as low fluid levels can affect sensor performance. | Transmission Fluid, Funnel |
| Replace the Sensor if Necessary | If the transmission fluid temperature sensor is faulty and sending a low signal, replace it with a new sensor to restore proper operation. | Replacement Parts, Standard Tools |
| Clear Code and Retest | After repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P0712 code has not returned. | 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