p0126
Moderate
Mazda · SUVs & Crossovers
Insufficient Coolant Flow Detected
Quick Answer
Error code P0126 on your Mazda SUVs & Crossovers means: Insufficient Coolant Flow Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check coolant level and top up if needed
2
Feel radiator hoses for adequate flow
3
Test thermostat by monitoring engine temp
4
Flush cooling system if blocked
5
Replace water pump or thermostat if faulty
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Thermostat
Water pump
Coolant
Coolant flush kit
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