Conditions For Setting The DTC
WARNING: This page is about a different car, the 2006 Saturn Ion 3 and 2006 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.
Lean Test
- The ECM detects that the HO2S 2 voltage parameter is less than 22 mV.
- DTC P0137 sets during the lean test within 100 seconds when the above condition is met.
OR
Power Enrichment Test
- The ECM detects that the HO2S 2 voltage parameter is less than 291 mV.
- DTC P0137 sets during the power enrichment test when the above condition is met.