Honda Accord Hybrid 2021 — technical service bulletin
Bulletin A22-009 · NHTSA communication 10215484 · issued Jun 7, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021
model years
1
vehicle entries
Official summary
"Service bulletin - The MIL comes on with DTC P2DE1 (Cold Start Air Fuel Ratio Control System Rich). A new cold start emission reduction strategy was applied to detect air fuel ratio abnormalities. When certain fuel and vehicle shutoff conditions are present, the LAF sensor may incorrectly judge the air fuel ratio to be rich."
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.