Details On DTCs

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DESCRIPTION

Pre-ignition detected

DETECTION CONDITION

Determination conditions

Pre-ignition is detected a few times continuously.

Preconditions

Engine coolant temperature: 80 °C {176 °F} or more⁽¹⁾

Malfunction determination period

Not applicable

Drive cycle

Self test type

CMDTC self test, KOER self test

Sensor used

Ion sensor

FAIL-SAFE FUNCTION

Not applicable

VEHICLE STATUS WHEN DTCs ARE OUTPUT

Illuminates the check engine light

POSSIBLE CAUSE

Fuel having octane rating lower than specified fuel is used
Carbon accumulated in combustion chamber
PCM malfunction

⁽¹⁾	Value can be verified by displaying the PIDs using the M-MDS.