Technical Service Bulletin 21-01-051H — 2021 HYUNDAI SONATA
ENGINE AND ENGINE COOLING
Bulletin Details
| TSB ID | 21-01-051H |
| Manufacturer | |
| Vehicle | 2021 HYUNDAI SONATA |
| Component | ENGINE AND ENGINE COOLING |
| Communication Date |
Bulletin Summary
This bulletin provides information related to an Electronic Control Module (ECM) software update which revises the OBD Air Fuel Ratio Imbalance (AFRI) monitor function frequency and cylinder imbalance diagnosis logic.
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 2021 HYUNDAI SONATA
25-01-001H DBP
FUEL/PROPULSION SYSTEM
24-EM-001H
ENGINE
23-EE-009H
ENGINE AND ENGINE COOLING
23-AT-009H
POWER TRAIN
23-01-002H
FORWARD COLLISION AVOIDANCE
22-01-018H
ENGINE AND ENGINE COOLING
21-EM-010H-1
ENGINE AND ENGINE COOLING
21-EM-011H
ENGINE AND ENGINE COOLING
21-AT-009H
POWER TRAIN
21-BE-002H
ELECTRICAL SYSTEM