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B1347
System
Supplemental Restraint (Airbag)
Benötigter Scanner
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Ignition Voltage Low — Restraints System

Understand B1347, common causes, and the right TOPDON scanner to diagnose it.

SRS module detected low ignition supply voltage during operation.

Häufige Symptome

  • Airbag light on after start
  • Multiple U-codes possible

Typische Ursachen

  • Weak 12V battery
  • Corroded battery terminals
  • Low voltage during crank

Welchen Scanner brauchen Sie?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Nutzen Sie Live-Daten und Freeze Frame, bevor Sie Teile tauschen. ABS-, SRS- und U-Codes erfordern meist einen Vollsystem-Scanner.

Diagnose-Tipps

  • Freeze Frame erfassen, wenn der Code erstmals gesetzt wird
  • Code erst nach Behebung der Ursache löschen
  • Auf verwandte pending codes prüfen
  • Batteriespannung über 12,4 V prüfen, bevor Sie Sensoren verdächtigen

Empfohlene TOPDON Scanner

Häufig gestellte Fragen

What does B1347 mean?
B1347 indicates ignition voltage low — restraints system. SRS module detected low ignition supply voltage during operation.
Can I diagnose B1347 with a basic code reader?
B1347 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for B1347?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with B1347?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.