Body, generic

B0830 Left Front Turn Signal Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Open J2012 sources do not include B0830, and no workshop or NHTSA text quotes it, so it remains unconfirmed. The title covers the left front indicator. The GM-developed Saab 9-3 monitors this lamp as B0530 in its front electrical centre: a draw above 6 A for longer than 6 ms counts as a short to ground and the output is switched off, while less than 50 mA counts as an open circuit. FMVSS 108 (S9.3.6) requires that a failed turn lamp becomes visible to the driver through the pilot indicator, as steady light, no light or a clearly changed flash rate. HELLA advises checking the bulb, corrosion in the holder, the fuse and the plug before suspecting electronics. A dead front indicator hides turning intentions from oncoming traffic. Other corners: B0831, B0840, B0841.

Likely causes

Indicator bulb burnt out
Corroded bulb holder or plug in the headlamp housing
Supply wire shorted to ground, output shut off
Indicator output of the electrical centre faulty

Symptoms

  • Left front indicator dark, warning in the display
  • Pilot light stays steady or flashes noticeably faster
  • Turning intention not visible to oncoming traffic; repair promptly

Repair estimate

DifficultyEasyDIY possible
Parts and labour€5–250
Time0.2–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

left front turn signalbody control module

Related codes

B0831B0840B0841

References: saabwisonline.com, saabwisonline.com, law.cornell.edu, hella.com.