DTC P2243:00: Notes

• The PCM monitors the A/F sensor terminal F voltage. If the either of the following condition is met, the PCM determines that the A/F sensor reference voltage circuit is open.

• The A/F sensor terminal F voltage is specified voltage or more for 30 s  .
• The PCM detects the DTC P0134:00 while the pending code P2243:00 is stored.

MONITORING CONDITIONS 

• Drive Mode 03 (EGR System, A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode)
• Following conditions are met:

• Engine is running
• Battery voltage: 11-18 V 
• A/F sensor element impedance specified or more

• This is a continuous monitor (A/F sensor, HO2S).
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycle or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• The DTC is stored in PCM memory.

• A/F sensor connector or terminals malfunction
• PCM connector or terminals malfunction
• Open circuit in wiring harness between A/F sensor terminal F and PCM terminal 2Z
• A/F sensor malfunction
• PCM malfunction