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2003 TOYOTA TACOMA
2.7L I4•RWD•AUTOMATIC•gas•3RZ-FE
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor1066Torque2197Fluid17DTC3480Battery2Maintenance0Recalls5
P0454low severityPowertrain

Evaporative Emission System Pressure Sensor/Switch Intermittent

on 2003 Toyota Tacoma 2.7L I4 · RWD

What this code means

The EVAP pressure sensor signal is dropping out or spiking intermittently. This usually points to a loose connection or a failing sensor rather than a steady fault.

Symptoms

  • Check engine light on
  • Intermittent EVAP-related codes
  • No noticeable drivability issue

Common causes

  • Loose or corroded sensor connector
  • Faulty EVAP pressure sensor
  • Damaged wiring to sensor
  • Intermittent PCM ground fault

Diagnostic steps

  1. Inspect EVAP pressure sensor connector and pins
  2. Wiggle-test wiring while monitoring live data
  3. Check sensor voltage against spec
  4. Replace sensor if signal drops out
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