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P0793 Powertrain

Intermediate Shaft Speed Sensor A Circuit No Signal

Intermediate shaft speed sensor A is connected and powered, but no rotation pulses arrive while the transmission is in motion. Either the sensor reluctor wheel is damaged, the sensor air gap is wrong, or the element has failed open.

Affected components

  • Intermediate shaft speed sensor a
  • Reluctor wheel

Common causes

  • High likelihood: Failed sensor element (open)
  • Medium likelihood: Damaged reluctor wheel

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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