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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