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Service bulletin 20NA234

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10186100
Published by NHTSA2021-02-01
Manufacturer's number20NA234
Manufacturer's date2020-12-22
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM; EQUIPMENT

NHTSA's summary

This service bulletin provides a procedure to program the ECM if found the cause of the MIL.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Equipment and accessories, Engine control module

Vehicles listed
CHEVROLET MALIBU2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PIP5628F2023-05-15. Service bulletin. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
21NA2572022-02-14. Service bulletin. This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3075 Set.
A2023219902021-08-09. Service bulletin. Service Update. Certain vehicles may have engine control module software that leads to erroneous additional fuel enrichment under rare driving conditions. Dealers are to reprogram the engine control module.
21NA1392021-08-09. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
20NA2342021-02-22. Service bulletin. This service bulletin provides a procedure to program the ECM if found the cause of the MIL.
20NA2302021-02-22. Service bulletin. This service bulletin provides a procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) - DTC P2B95, P2B0A, P2B08, P2B09, and/or P2B0B set.