P0860 OBD-II: Gear Shift Control Module "A" Communication Circuit
P0860 Severity
Should you fix P0860 yourself?
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
What causes OBD-II fault code P0860?
The Transmission Control Module (TCM) and the engine computer (PCM) constantly talk to each other to ensure that the driver's request for performance is met. If the TCM and PCM fail to communicate, code P0860 is stored.
What Does P0860 Code Mean?
OBD-II Code P0860 is defined as a Gear Shift Control Module "A" Communication Circuit
The Transmission Control Module (TCM) and the engine computer (PCM) constantly talk to each other to ensure that the driver's request for performance is met. If the TCM and PCM fail to communicate, code P0860 is stored.
P0860 Symptoms
- Engine may not start
- Transmission may not shift properly
Common Problems That Trigger the P0860 Code
- Powertrain Control Module (PCM) failure
- Transmission Control Module (TCM) failure
- Wiring issue
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