DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P0053

HO2S1 HTR B1

(HO2S heater resistance bank 1 sensor 1)

During engine running, weighted average of A/F sensor internal resistance is out of the normal range

• Harness and connectors [A/F sensor 1 (bank 1) heater circuit is open or shorted.]
• A/F sensor 1 (bank 1) heater