DTC Detection Logic

DTC No.

Trouble diagnosis

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0030

A/F SEN1 HTR (B1)

[A/F sensor 1 heater (bank 1) performance]

Deterioration in A/F sensor 1 heater performance.

(Voltage signal transmitted from A/F sensor 1 heater to ECM is higher/lower than voltage in the normal range.)

• Harness or connectors

  (The A/F sensor 1 heater circuit is open or shorted.)

• A/F sensor 1 heater