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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
P0654low severityPowertrain

Engine RPM Output Circuit

on 2003 Toyota Tacoma 2.7L I4 · RWD

What this code means

The PCM detected a fault in the engine RPM output circuit that sends tachometer signals to external devices. The tachometer or connected accessories may not work correctly.

Symptoms

  • Tachometer inoperative or erratic
  • Accessory RPM devices not working
  • Check engine light on

Common causes

  • Wiring or connector fault
  • Faulty tachometer or gauge
  • Short or open in output circuit
  • PCM driver failure

Diagnostic steps

  1. Read stored codes
  2. Inspect RPM output wiring
  3. Measure output signal at connector
  4. Test cluster and PCM circuit
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