C0040 on the 2013 Buick Regal
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| PIC5837 | 2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have Antilock Braking System Malfunction Indicator Lamp is illuminated and there is a "Service Stability" message displayed. Technician may find Diagnostic Trouble Code C0800 sym 07 with C0035, C0040, C0045 or C0050. Technician should follow published Service Information diagnostics for Diagnostic Trouble Codes C0035, C0040, C0045 or C0050 first. |
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| PIC5720A | 2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician on the steps needed to diagnose and repair vehicles that may have buzz or hum noise is heard in the right front at times. Also may have a Antilock Braking System Malfunction Indicator Lamp, Service Brake Assist Message or Service Engine Soon Malfunction Indicator Lamp may be displayed. The following Diagnostic Trouble Code may be set C027B, C0040 and P0CBE. The technician will inspect for the wire harness under the hood to be contacting the crank pulley, air conditioning compressor pulley or accessory drive belt due to misrouting or not secured properly. Repair wiring as needed or replace the harness, correct routing and properly secure. Once wiring repairs are complete confirm proper brake booster vacuum pump operation. |
| PIC5720B | 2017-03-17. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS NEEDED TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE BUZZ OR HUM NOISE IS HEARD IN THE RIGHT FRONT AT TIMES. ALSO MAY HAVE A ANTILOCK BRAKING SYSTEM MALFUNCTION INDICATOR LAMP, SERVICE BRAKE ASSIST MESSAGE OR SERVICE ENGINE SOON MALFUNCTION INDICATOR LAMP MAY BE DISPLAYED. THE FOLLOWING DIAGNOSTIC TROUBLE CODE MAY BE SET C027B, C0040 AND P0CBE. THE TECHNICIAN WILL INSPECT FOR THE WIRE HARNESS UNDER THE HOOD TO BE CONTACTING THE CRANK PULLEY, AIR CONDITIONING COMPRESSOR PULLEY OR ACCESSORY DRIVE BELT DUE TO MISROUTING OR NOT SECURED PROPERLY. REPAIR WIRING AS NEEDED OR REPLACE THE HARNESS, CORRECT ROUTING AND PROPERLY SECURE. ONCE WIRING REPAIRS ARE COMPLETE CONFIRM PROPER BRAKE BOOSTER VACUUM PUMP OPERATION. |
3 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.