The MIL comes on with DTC P0420 (rear bank catalyst system efficiency below threshold [bank 1]).
Acura technical service bulletin B19-049 for 2015-2017 Acura TLX.
- Bulletin number
- B19-049
- Component
- Engine and engine cooling
- Summary
- Service Bulletin - The MIL comes on with DTC P0420 (rear bank catalyst system efficiency below threshold [bank 1]).
Owners of these vehicles have filed 172 complaints in the engine category.
Vehicles covered
VIN decoder
See the problems and recalls for an exact car
Buying a used Acura TLX?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history