P0842 – Transmission Fluid Pressure Sensor Low Input

Description

The ECM detects a low voltage signal from the pressure sensor.

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Symptoms

  • Harsh shifting
  • Limp mode
  • Delayed engagement

Causes

  • Short to ground
  • Faulty sensor
  • Low fluid

Diagnosis

  • Monitor sensor voltage
  • Inspect wiring
  • Check fluid

Repair

  • Repair wiring
  • Replace sensor
  • Refill fluid