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2015 SUZUKI SOLIO
1.2L I4 Hybrid K12C•FWD•AUTOMATIC•hybrid
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Repairs0Labor464Torque279Fluid6DTC1793Battery1Maintenance0Recalls0
P0126moderate severityPowertrain

Insufficient Coolant Temperature for Stable Operation

on 2015 Suzuki Solio 1.2L I4 Hybrid K12C · FWD

What this code means

The engine is not reaching or holding a stable operating temperature. This is often caused by a thermostat stuck open.

Symptoms

  • Poor heater output
  • Poor fuel economy
  • Longer warm-up time

Common causes

  • Thermostat stuck open
  • Faulty engine coolant temperature sensor
  • Low coolant level
  • Faulty cooling fan running constantly

Diagnostic steps

  1. Monitor coolant temperature at warm-up
  2. Inspect thermostat operation
  3. Test coolant temperature sensor
  4. Replace thermostat or sensor as needed
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