FixVault
Home › Mercedes Benz › 2001 › ML430 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P1031: O2 Sensor Upstream Of TWC (G3/3) & (G3/4) Exchanged › Testing Procedure

Testing Procedure

Verify upstream O2 sensor connectors are properly connected. Repair as necessary.

About FixVault