
Diagnostic Procedure

Dtc 14
Dtc 18Mazda 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 ...
Mazda 6 Service Manual: Three-way catalytic converter (twc) inspection
Note
Make sure that no HO2S DTCs have been detected. If detected, this
inspection is not applicable for TWC inspection.
1. Connect the WDS or equivalent and monitor PIDs as following.
Monitor the right TWC using O2S11 PID for upstream HO2S and O2S12 PID
for downstream HO2S.
2. Be ...