P0864 OBD-II: TCM Communication Circuit Range/Performance
P0864 Severity
Should you fix P0864 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 P0864?
If the Transmission Control Module (TCM) cannot communicate with other modules or the engine control module (PCM) can not communicate with the PCM, code P0864 will be set.
Need a P0864 diagnosis? Trust our experts.
Tuffy Tire & Auto Service Center - Grandview
Excite Auto Repair & Towing
All In Auto Service
Tuffy Tire & Auto Service - Grove City
What Does P0864 Code Mean?
OBD-II Code P0864 is defined as a TCM Communication Circuit Range/Performance
If the Transmission Control Module (TCM) cannot communicate with other modules or the engine control module (PCM) can not communicate with the PCM, code P0864 will be set.
P0864 Symptoms
- Increased fuel consumption
- Transmission may not shift properly
Common Problems That Trigger the P0864 Code
- Transmission Control Module (TCM) failure
- Wiring issue
Ask our experts about P0864.
RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.
Call us at 877-913-1554
Available 9am – 6pm ET Monday through Friday