Conditions For Setting The DTC

Lean Test

• The ECM detects that the HO2S 1 voltage parameter is less than 291 mV.
• DTC P0131 sets during the lean test within 100 seconds when the above condition is met.

OR

Power Enrichment Test

• The ECM detects that the HO2S 1 voltage parameter is less than 291 mV.
• DTC P0131 sets during the power enrichment test within 10 seconds when the above condition is met.