Body, generic

B0811 Right Headlamp Low Beam Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

No J2012 excerpt or published service text uses B0811, which leaves the code undocumented. The title names the right dipped-beam circuit. In GM's 2011 Saab 9-5 the body control module powers low beam or daytime running lamps, while a separate headlamp control module stores B2699 (02 grounded, 04 open, 00 malfunction) when it sees a commanded lamp stay dark. The older 9-3 uses the same number B2699 for its right dipped beam and sets 04 below 0.8 A or 0B at 7.9–30 A, for instance after a bulb of the wrong rating has been fitted. FMVSS 108 sets the lower-beam requirements every car has to meet. A failed right dipped beam leaves the kerb side poorly lit at night and should be fixed quickly. Left side: B0810.

Likely causes

Right low-beam bulb or LED unit failed
Incorrect bulb rating after a replacement
Open or grounded supply wire to the headlamp
Headlamp or body control module output faulty

Symptoms

  • Right dipped beam or daytime running lamp stays dark
  • Lamp warning shown in the instrument cluster
  • Kerb side poorly lit at night; have it repaired promptly

Repair estimate

DifficultyEasyDIY possible
Parts and labour€10–600
Time0.2–2 h

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

Parts involved

right low beam lampbody control module

Related codes

B0810B0800B0821

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