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P0709 Powertrain

Transmission Range Sensor A Circuit Intermittent

Same as P0707 with intermittent or erratic signal. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.

Affected components

  • Transmission range sensor a

Common causes

  • High likelihood: Intermittent contact at connector
  • Low likelihood: Connector with intermittent contact under vibration
  • Low likelihood: Harness routed against vibrating component

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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