U0152 code meaning
Lost Communication With Side Restraints Control Module - Left
What U0152 means
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.
U0152 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0152
- Airbag warning lamp on
- Left side or curtain airbag possibly not ready
- Code stored in the main airbag module
Common causes of U0152
- Most likelyConnector under the left seat or in the pillar loose or corroded
- PossiblePower or ground of the left side module missing
- PossibleWater ingress at the sill or door damaging wiring or module
- Less likelyLeft side restraints module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Side restraints module leftCAN bus wiring
What each part of U0152 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 52 | The exact fault in that area. |
What to do next
- Note U0152 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0152
What does U0152 mean?
U0152 means "Lost Communication With Side Restraints Control Module - Left". U0152 is the left-hand partner of U0153: a separate controller for the side restraints on the left no longer sends. It is a generic code, so it means the same on every make.
Is it safe to drive with U0152?
U0152 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0152 fail an emissions test?
U0152 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0152 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U0152 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.