The P0860: Gear Shift Module Communication Circuit refers to a communication issue between the vehicle’s systems and the gear shift module. This may result in improper gear shifting or transmission malfunction. The issue could be caused by a faulty gear shift module, wiring issues, or connector problems, preventing proper communication with the transmission system.
P0860 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0860: Gear Shift Module Communication Circuit |
| Is it serious? | Yes, it can lead to improper gear shifting and transmission performance issues. |
| Possible causes | – Communication issues with gear shift module – Faulty gear shift module – Wiring or connector issues |
| How to diagnose? | – Check communication with the gear shift module – Inspect wiring and connectors – Replace faulty components if needed |
P0860 Meaning
The P0860: Gear Shift Module Communication Circuit code indicates that there is a breakdown in communication between the gear shift module and other vehicle systems, including the transmission control module (TCM). This can lead to erratic gear shifting, delayed response, or failure to shift gears properly.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional communication or transmission-related codes that may provide more insights. | OBD-II Scanner |
| Inspect Gear Shift Module | Visually inspect the gear shift module for signs of damage, misalignment, or loose connections. | Flashlight, Safety Gloves |
| Test Communication with Module | Use a diagnostic tool to check for proper communication between the gear shift module and the transmission control system. | Diagnostic Tool |
| Check Wiring and Connectors | Inspect the wiring and connectors leading to the gear shift module for signs of damage, corrosion, or loose connections. | Flashlight, Multimeter |
| Replace Faulty Components | If the gear shift module, wiring, or connectors are faulty, replace the necessary components to restore communication. | Replacement Parts, Basic Tools |
| Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and test the vehicle to ensure proper gear shifting. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the system to confirm that the P0860 code does not return. | OBD-II Scanner |
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