U0172 — Data Bus Supplementary Restraint System Srs Sensor C No: causes, fixes & cost | TroubleAtlas

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OBD-II · FAULT CODE
U0172.

Data Bus Supplementary Restraint System Srs Sensor C No Communication

U0172 — Data Bus Supplementary Restraint System Srs Sensor C No Communication. It is a medium-severity fault: you can usually keep driving for short distances. The most common cause is damaged wiring, corrosion or a loose connector in the circuit.

CAN YOU STILL DRIVE? YES, WITH CAUTION

"Not urgent today, but it won't fix itself either."

Car dashboard with warning lights on
SEVERITY
MEDIUM — YES, WITH CAUTION
OBD2 SCANNER
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01What it means & symptoms

U0172 is a network diagnostic trouble code. It identifies a fault related to Data Bus Supplementary Restraint System Srs Sensor C No Communication. The network/communication module monitors this circuit or component continuously and sets U0172 when the signal or value is outside the expected range, implausible or missing. This points to a communication or module fault that can affect one or more connected systems. The base function may still work, but performance can be affected, so the fault should be diagnosed. Diagnosis generally means inspecting the related wiring, connectors and power/ground references, then verifying the component against specification with a scan tool.

  • Warning light(s) on the dashboard
  • One or more connected systems may report faults
  • Fault code stored in the control module
02Most likely causes
Ranked from field data — confirmed by ≥2 independent sources.
#Cause
01Damaged wiring, corrosion or a loose connector in the circuit
02Faulty sensor, actuator or component referenced by the code
03Open, short or high resistance in the circuit
04Poor power supply or ground reference to the component
05Failed control module

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13Technical Service Bulletins & recalls

No technical service bulletins or recalls currently reference U0172. This section updates automatically when manufacturers publish related bulletins.

12Which vehicles get this code
14Frequently asked questions
Which vehicles most commonly report U0172?

In our database U0172 is recorded across 450 vehicle models — most frequently on the Hyundai Santa-Fe, Hyundai Tucson, Ford F-150.

Can I keep driving with U0172?

YES, WITH CAUTION — get it diagnosed as soon as possible.

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