DTC P0054:00: Notes

DTC P0054:00

HO2S heater resistance problem

DETECTION CONDITION

The PCM monitors the HO2S heater resistance when under the HO2S heater control. If the resistance is more than 34 ohms , the PCM determines that there is a HO2S heater circuit problem.
Diagnostic support note
This is an intermittent monitor (A/F sensor heater, HO2S heater).
The MIL illuminates if PCM detects the above malfunctioning condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available if PCM detects the above malfunction conditions during first drive cycle.
FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

HO2S connector or terminal malfunction
Short to ground or open circuit in HO2S heater power supply circuit
- Short to ground in wiring harness between ignition switch terminal C⁽¹⁾/relay block terminal 1B⁽²⁾ and HO2S terminal C
- HEGO 5 A fuse malfunction
- Open circuit in wiring harness between ignition switch terminal C⁽¹⁾/relay block terminal 1B⁽²⁾ and HO2S terminal C
Short to ground in wiring harness between HO2S terminal D and PCM terminal 2B
HO2S heater malfunction
PCM connector or terminal malfunction
Open circuit in wiring harness between HO2S terminal D and PCM terminal 2B
PCM malfunction

⁽¹⁾	Vehicles without advanced keyless entry and push button start system

⁽²⁾	Vehicles with advanced keyless entry and push button start system