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 during the lean test when the above condition is met.

Power Enrichment Test

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