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 AND POSSIBLE CAUSE

DESCRIPTION

Open circuit between A/F sensor terminal B and PCM terminal 1AG

DETECTION CONDITION

Determination conditions

After A/F sensor activation, a condition in which PCM terminal 1AB voltage is within the specified range continues for 5 s or more.

Preconditions

Battery voltage: 11-18 V⁽¹⁾
The following DTC is not detected:
- Internal PCM malfunction: P064D:00

Drive cycle

Self test type

CMDTC self test, KOER self test

Sensor used

A/F sensor

FAIL-SAFE FUNCTION

Fixes duty value of A/F sensor heater
Stops fuel feedback control of A/F sensor

VEHICLE STATUS WHEN DTCs ARE OUTPUT

Illuminates check engine light.

POSSIBLE CAUSE

A/F sensor connector or terminals malfunction
PCM connector or terminals malfunction
Open circuit in wiring harness between A/F sensor terminal B and PCM terminal 1AG
A/F sensor malfunction
PCM malfunction

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