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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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Repairs0Labor1042Torque1610Fluid17DTC3334Battery2Maintenance0Recalls5
P0680low severityPowertrain

Cylinder 10 Glow Plug Circuit

on 1998 Toyota Tacoma 2.7L I4 · RWD

What this code means

The PCM detected a fault in the glow plug control circuit for cylinder 10. Faulty glow plugs lead to hard starting and rough operation when cold.

Symptoms

  • Hard cold starting
  • Rough idle when cold
  • Warning lamp on

Common causes

  • Faulty glow plug cylinder 10
  • Corroded wiring
  • Bad glow plug control module
  • Blown fuse or relay

Diagnostic steps

  1. Scan for glow plug codes
  2. Measure cylinder 10 glow plug resistance
  3. Check wiring and connectors
  4. Test control module voltage
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