Code Definition

P1860 — Automatic transmission torque converter clutch fault

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Honda

About P1860

P1860 is a manufacturer-specific powertrain diagnostic trouble code recorded for Honda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1860 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This DTC is set when the Powertrain Control Module (PCM) or Transmission Control Module (TCM) detects a fault in the torque converter clutch (TCC) solenoid control circuit. The TCC solenoid regulates the hydraulic pressure that locks and unlocks the torque converter clutch, which mechanically couples the engine to the transmission at cruise to reduce slip and improve fuel economy. P1860 sets when the control module identifies an open, a short, or an electrical performance problem in the TCC solenoid circuit during commanded apply or release events. With the fault present the driver may notice ...

Join TaT to view the complete code information and diagnostic details.

Quick Facts