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U0170
System
Network (CAN Bus)
Scanner som krävs
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.

Vanliga symptom

  • Airbag light on
  • B-codes may accompany

Typiska orsaker

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

Vilken scanner behöver du?

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

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade TOPDON-scannrar

Vanliga frågor

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.