p0126
Moderate
Mazda · Sedans
Insufficient Coolant Temperature for Stable Operation
Quick Answer
Error code P0126 on your Mazda Sedans means: Insufficient Coolant Temperature for Stable Operation. 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 off if needed
2
Monitor engine temperature gauge
3
Feel radiator for temperature balance
4
Test coolant temperature sensor
5
Replace thermostat if necessary
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
Coolant
Thermostat
Temperature sensor
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