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2011 HYUNDAI TUCSON
2.4L I4•AWD•AUTOMATIC•gas
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor502Torque3416Fluid10DTC1815Battery1Maintenance0Recalls5
P0682low severityPowertrain

Cylinder 12 Glow Plug Circuit

on 2011 Hyundai Tucson 2.4L I4 · AWD

What this code means

The PCM detected a fault in the glow plug control circuit for cylinder 12. Failed glow plugs cause hard starting and rough running in cold conditions.

Symptoms

  • Hard cold starting
  • Rough running when cold
  • Warning lamp illuminated

Common causes

  • Faulty glow plug cylinder 12
  • Corroded or broken wiring
  • Bad glow plug control module
  • Blown fuse

Diagnostic steps

  1. Scan for diagnostic codes
  2. Measure cylinder 12 glow plug resistance
  3. Check harness and connectors
  4. Test control module output
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