Suche
U0170
System
Network (CAN Bus)
Benötigter Scanner
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Restraints System Module

Understand U0170, common causes, and the right TOPDON scanner to diagnose it.

Airbag/SRS module not communicating — overlaps with U0151 on some vehicles.

Häufige Symptome

  • Airbag light on
  • B-codes may accompany

Typische Ursachen

  • Failed SDM/airbag module
  • CAN wiring
  • Low voltage
  • Prior deployment event

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 U0170 mean?
U0170 indicates lost communication with restraints system module. Airbag/SRS module not communicating — overlaps with U0151 on some vehicles.
Can I diagnose U0170 with a basic code reader?
U0170 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 U0170?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0170?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.