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P0126 — Insufficient Coolant Temperature for Stable Operation

Engine coolant temperature has not stabilized at operating temperature.

Severity: LowRepair: $15-$300Difficulty: Easy

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Common symptoms of P0126

Common causes of P0126

Repair cost & difficulty

Typical cost to fix P0126: $15-$300 · Difficulty: Easy

Pro tip: Thermostat replacement usually fixes this.

Vehicles commonly affected

All makes

Related trouble codes

P0125P0128

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.