Other information:
DTC Description
DTC DETECTION LOGICNOTE:
If DTC B2557 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Description.
If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010...
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0053
HO2S1 HTR B1
(HO2S heater resistance bank 1 sensor 1)
Diagnosis condition
—
Signal (terminal)
A/F sensor 1 heater (bank 1) signal
Threshold
During engine running, weighted average of A/F sensor internal resistance is out of the normal range
Diagnosis delay time
—
POSSIBLE CAUSE
Harness and connectors [A/F sensor 1 (bank 1) heater circuit is open or shorted...