Technical Service Bulletin 09-110-23R — 2019 SUBARU WRX
EQUIPMENT
Bulletin Details
| TSB ID | 09-110-23R |
| Manufacturer | |
| Vehicle | 2019 SUBARU WRX |
| Component | EQUIPMENT |
| Communication Date |
Bulletin Summary
This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System Efficiency Below Threshold Bank 1) is detected by the Engine Control Module (ECM).
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2019 SUBARU WRX
4-30-25
ELECTRICAL SYSTEM
15-318-24
ELECTRICAL SYSTEM
15-256-19R
EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM)
15-236-18R
EQUIPMENT:ELECTRICAL:INFOTAINMENT
16-131-20R
ELECTRICAL SYSTEM
15-298-22
COMMUNICATION:MANUFACTURER TELEMATICS
05-88-21
SUSPENSION
11-199-20R
ENGINE AND ENGINE COOLING
03-78-17R
EQUIPMENT
03-78-17R
EQUIPMENT ADAPTIVE/MOBILITY