B3948 on the 2004 Saturn Ion
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 030842009 | 2003-10-07. Service bulletin. ONE OR BOTH DAYTIME RUNNING LAMPS (DRL) ARE INOPERATIVE, DIAGNOSTIC TROUBLE CODE (DTC) B3948 AND/OR B3949 MAY BE SET. *TT ERRATIC FRONT TURN SIGNAL OPERATION WHEN USING A CELL PHONE CHARGER IN EITHER ACCESSORY POWER OUTLET. *TT |
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1 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.