FixVault
Home › Buick › 2003 › Regal LS › Repair and Diagnosis › Engine Performance › System › Engine Control System Self-Diagnostics - 3.8L › Diagnostic Tests › DTC P0420: Catalyst System Low Efficiency › Conditions For Setting DTC

Conditions For Setting DTC

DTC sets when PCM determines catalysts oxygen storage capacity is less than an acceptable threshold.

About FixVault