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U0152 Lost Communication With Side Restraints Control Module - Left

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0152 is the left-hand partner of U0153: a separate controller for the side restraints on the left no longer sends. In most cars side impacts are detected by satellite sensors in sills, B- or C-pillars that feed the central airbag unit; Bosch, for example, mounts its peripheral acceleration sensors on the left and right of the body and links them over the PSI5 sensor interface. Some architectures go further and give each side its own module on the vehicle bus, and only those can set this code. No manufacturer documents U0152 publicly. The listener, usually the main restraints module, logs the loss when the periodic message of the left unit is missing while voltage is in range. The airbag lamp lights and left-side or curtain protection may be lost; there is no MIL. U0151 is the main module, U0453 invalid data from the left unit.

Likely causes

Connector under the left seat or in the pillar loose or corroded
Power or ground of the left side module missing
Water ingress at the sill or door damaging wiring or module
Left side restraints module internally faulty

Symptoms

  • Airbag warning lamp on
  • Left side or curtain airbag possibly not ready
  • Code stored in the main airbag module

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–900
Time0.5–3 h

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

Parts involved

side restraints module leftcan bus wiring

Related codes

U0151U0153U0154U0453

References: saabwisonline.com, bosch-mobility.com, en.wikipedia.org.