Conditions for Setting the DTC

Lean Test:

• The PCM detects that the HO2S 1 voltage parameter is less than 50 mV.
• DTC P0131 sets within 100 seconds, when the above condition is met.

OR

Power Enrichment Test:

• The PCM detects that the HO2S 1 voltage parameter is less than 700 mV.
• DTC P0131 sets within 100 seconds, when the above condition is met during any occurrence of power enrichment.