The P0814: Transmission Range Display Circuit fault indicates an issue with the circuit that displays the transmission range (gear position) on the dashboard. This problem may be caused by a faulty display circuit, wiring or connector issues, or a malfunctioning transmission control module (TCM).
P0814 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0814: Transmission Range Display Circuit |
| Is it serious? | Yes, it can affect the driver’s ability to know the current gear, leading to potential safety and drivability issues. |
| Possible causes | – Faulty transmission range display circuit – Wiring or connector issues – Faulty transmission control module (TCM) |
| How to diagnose? | – Test transmission range display circuit – Inspect wiring and connectors – Replace faulty components if needed |
P0814 Meaning
The P0814 code indicates that there is a problem with the transmission range display circuit. This circuit communicates the gear position (such as Park, Reverse, Neutral, Drive) to the display on the dashboard. If this circuit is not functioning properly, the driver may not know which gear the transmission is in, which can lead to safety issues.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for other transmission or electrical-related codes that could provide further details about the issue. | OBD-II Scanner |
| Test Transmission Range Display Circuit | Use a multimeter or diagnostic tool to test the transmission range display circuit for continuity, proper voltage, and signal accuracy. Ensure the readings match manufacturer specifications. | Multimeter, Diagnostic Scanner |
| Inspect Wiring and Connectors | Inspect the wiring and connectors associated with the transmission range display circuit for damage, corrosion, or loose connections that may cause a signal disruption. | Flashlight, Multimeter, Safety Gloves |
| Check Transmission Control Module (TCM) | Test the TCM to ensure it is correctly sending signals to the transmission range display circuit. Look for any faults in communication between the TCM and display. | Diagnostic Scanner, TCM Testing Tools |
| Repair or Replace Faulty Components | If the transmission range display circuit, wiring, or TCM is faulty, repair or replace the necessary components following manufacturer specifications. | Replacement Parts, Wrenches, Screwdrivers |
| Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and test drive the vehicle to ensure the transmission range displays correctly and the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, rescan the vehicle to ensure the P0814 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