Mazda 6 Service Manual: No.18 cooling system concerns-runs cold

No.17 cooling system concerns-overheating

No.19 exhaust smoke

Other materials:

Mazda 6 Service Manual: Foreword
Caution When the engine does not start or stalls and the following DTCs are not indicated, go to engine symptom troubleshooting. Note When the immobilizer system is defective, the engine cannot be started. If engine condition is normal but light stays on, inspect for short circ ...

Mazda 6 Service Manual: Engine Coolant Temperature Gauge
Displays the engine coolant temperature. The blue gauge indicates that the engine coolant temperature is low, and the red gauge indicates that the engine coolant temperature is high and overheating. CAUTION If the high engine coolant temperature warning light (red) turns on, there is a pos ...