P0120 – TPS Sensor A Circuit

Description

The ECM detects an incorrect or implausible signal from TPS sensor A.

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Symptoms

  • Hesitation
  • Poor acceleration
  • Rough idle

Causes

  • Faulty TPS sensor
  • Wiring issues
  • Dirty throttle body

Diagnosis

  • Monitor TPS data
  • Inspect wiring
  • Clean throttle body

Repair

  • Replace TPS sensor
  • Repair wiring
  • Clean throttle body