Body, generic

B0510 Driver Door Open Switch

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0510 is missing from the publicly available J2012 lists, and no manufacturer defines it in accessible documents. GM does list B0510 among the circuit DTC keywords of bulletin PIP5094 (2014 and earlier cars and light trucks), but without a descriptor. The title points to the switch that tells the body electronics the driver door is being opened. In GM's 2011 Saab 9-5 the comparable input is the driver exterior handle switch, coded B3849 02: if the keyless entry module sees that line grounded or closed for over 180 s, it ignores the handle. Toyota's EP2372055A1 shows why such inputs matter: a door courtesy switch that fails to report an opening can let auto-lock trap the key inside. The passenger door counterpart is B0520.

Likely causes

Driver door switch worn, dirty or stuck in one position
Wire broken or chafed in the driver door hinge passage
Moisture or corrosion at the switch connector
Input stage of the body or keyless entry module faulty

Symptoms

  • Interior light stays off when the driver door is opened
  • Keyless opening at the driver handle does not respond
  • Door-open message or chime missing or shown permanently

Repair estimate

DifficultyEasyDIY possible
Parts and labour€20–200
Time0.3–1.5 h

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

Parts involved

door jamb switchdoor wiring harnessbody control module

Related codes

B0520B0540B0260

References: static.nhtsa.gov, saabwisonline.com, patents.google.com.