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Service bulletin PI1152

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 id10191011
Published by NHTSA2021-04-28
Manufacturer's numberPI1152
Manufacturer's date2014-01-01
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

HVAC Stuck in Defrost Mode, DTCs B0248, B0268 or B0408 Set Condition/Concern Some customers may comment that the HVAC system is stuck in the defrost mode. When checking the vehicle for DTCs, the HVAC control module may report B0248, B0268 or B0408 set as current. Once the DTC(s) are cleared, the air delivery mode can be changed. This condition may be due to an actuator over-traveling or intermittently binding, causing the DTC(s) to set.

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, Equipment and accessories, Heating and air conditioning, Software

Trouble codes named

B0248, B0268, B0408

Vehicles listed
CHEVROLET MALIBU2010, 2011, 2012

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

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