DTC P0420 Acura
Rear Bank Catalyst System Efficiency Below Threshold (Bank 1)
Rear Bank Catalyst System Efficiency Below Threshold (Bank 1)
Description
The execution time is once per driving cycle and the duration time is 102 seconds or more. The number of detections is 752 (CTAGLT67) or more. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.
Cause and Solution
Poor connections or loose terminals at the secondary HO2S (sensor 2) and the PCM
Video Guide
Diagnostic Info
- DTC Code: P0420
- Brand: Acura