P0860 OBD-II: Gear Shift Control Module "A" Communication Circuit

P0860 Severity

Urgent

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.

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P0860 Summary Find a Repair Shop P0860 Details Ask RepairPal CarGenius Other OBD-II Codes

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

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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Other OBD-II Codes

P085E: Gear Shift Control Module "B" Performance P085D: Gear Shift Control Module "A" Performance P085C: Gear Shift Control Module "B" Communication Circuit High P085B: Gear Shift Control Module "B" Communication Circuit Low P085A: Gear Shift Control Module "B" Communication Circuit P0859: Traction Control Input Signal High P0858: Traction Control Input Signal Low P0857: Traction Control Input Signal Range/Performance P0856: Traction Control Input Signal P0855: Drive Switch Input Circuit High P0854: Drive Switch Input Circuit Low P0853: Drive Switch Input Circuit P0861: Gear Shift Control Module "A" Communication Circuit Low P0862: Gear Shift Control Module "A" Communication Circuit High P0863: TCM Communication Circuit P0864: TCM Communication Circuit Range/Performance P0865: TCM Communication Circuit Low P0866: TCM Communication Circuit High P0867: Transmission Fluid Pressure P0868: Transmission Fluid Pressure Low P0869: Transmission Fluid Pressure High P0870: Transmission Fluid Pressure Sensor/Switch "C" Circuit P0871: Transmission Fluid Pressure Sensor/Switch "C" Circuit P0872: Transmission Fluid Pressure Sensor/Switch "C" Circuit Low

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