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2003 SATURN L-SERIES
2.2L I4•FWD•AUTOMATIC•gas
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Repairs0Labor496Torque3468Fluid7DTC1803Battery1Maintenance0Recalls0
P0682low severityPowertrain

Cylinder 12 Glow Plug Circuit

on 2003 Saturn L-Series 2.2L I4 · FWD

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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