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1998 TOYOTA TACOMA
2.7L I4•RWD•AUTOMATIC•gas
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor1047Torque1633Fluid17DTC3334Battery2Maintenance0Recalls5
P0652moderate severityPowertrain

Sensor Reference Voltage B Circuit Low

on 1998 Toyota Tacoma 2.7L I4 · RWD

What this code means

The PCM detected a low voltage condition on the B sensor reference voltage circuit. Sensors sharing this reference may read incorrectly.

Symptoms

  • Multiple sensor faults
  • Poor engine performance
  • MIL illuminated

Common causes

  • Short to ground in reference circuit
  • Shorted sensor pulling voltage low
  • Damaged wiring
  • PCM internal fault

Diagnostic steps

  1. Retrieve trouble codes
  2. Inspect wiring for short to ground
  3. Disconnect sensors to isolate short
  4. Test PCM reference output
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