LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 6) >> Engine (ECM) >> P014E A/F Sensor 1 >> DTC Description >> VR30DDTT engine >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

To judge malfunctions, this diagnosis measures response time of the A/F signal computed by ECM from the A/F sensor 1 signal. The time is compensated by engine operating (speed and load), fuel feedback control constant, and the A/F sensor 1 temperature index. Judgment is based on whether the compensated time (the A/F signal cycling time index) is inordinately long or not.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P014E

A/F SENSOR1 (B2)

(O2 sensor slow response - rich to lean bank 2 sensor 1)

The response time of a A/F sensor 1 signal delays more than the specified time computed by ECM.