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P0870 Powertrain

Transmission Fluid Pressure Sensor/Switch C Circuit

Electrical fault on the transmission fluid pressure sensor C circuit. Sensor C typically monitors a third hydraulic clutch or band line.

Affected components

  • Transmission fluid pressure sensor c
  • Wiring harness

Common causes

  • High likelihood: Sensor failed
  • Medium likelihood: Wiring fault

Possible symptoms

  • Check engine or transmission warning light on
  • Harsh, delayed, or missing shifts
  • Possible limp mode (locked in one gear)
  • Slipping or shuddering during gear changes

Diagnostic notes

  • The malfunction indicator lamp may illuminate

Related codes

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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