U017E

Universal

Lost Communication With Seatbelt Pretensioner Module A

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Advanced
High Severity

The vehicle’s restraint-system network has detected that it is not receiving expected communication from Seatbelt Pretensioner Module A. A pretensioner helps tighten a seatbelt during a collision. The code does not prove that the module itself has failed; a communication problem could affect how the restraint system works and may turn on a warning light.

Report an error with this code

⚠️ Before You Begin (Safety First)

Treat this as a safety-system fault and arrange prompt diagnosis. If the SRS or airbag warning light is on, restraint protection may be reduced. Do not probe, unplug, or bypass pretensioner or other SRS wiring. If a seatbelt will not latch or retract properly, do not use that seating position until it is checked.

Common Symptoms

  • The SRS or airbag warning light may illuminate because the vehicle has detected a restraint-system communication fault.
  • A compatible scan tool may show that Seatbelt Pretensioner Module A is not responding.
  • Some restraint functions may not operate as intended if the module cannot communicate.
  • There may be no obvious driving symptom; this fault may only be noticed through a warning light or diagnostic scan.

Common Causes

  • A loose, damaged, or corroded connector or wiring connection in the module’s power, ground, or communication circuits.
  • A break, short, or other fault in the communication network wiring.
  • An interruption to the module’s power or ground supply.
  • A fault within Seatbelt Pretensioner Module A.
  • A temporary or broader vehicle-network or electrical fault affecting communication.

Diagnostic Steps

  1. Note any SRS warning lights and when they appear; this helps a technician understand the reported condition.
  2. Check that the seatbelts latch, release, and retract normally. Do not use a seatbelt that is not functioning correctly.
  3. With the vehicle off, look for obvious damage or interference around accessible wiring without touching, unplugging, or probing SRS connectors.
  4. If you have a scan tool that can read restraint-system codes, record the codes and whether they are current or stored before clearing anything.
  5. Arrange qualified diagnosis if the warning remains, the code returns, or any seatbelt function is abnormal. Leave SRS electrical testing and connector handling to a qualified technician.

When to Call a Professional

A qualified technician can scan the restraint and related modules, check whether the communication fault is current, and inspect the module’s power, grounds, network wiring, and connectors using vehicle-specific service information. Confirm the circuit and network condition before considering module replacement, and follow the vehicle’s SRS safety procedures.

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Commonly Asked Questions

Does U017E prove that the pretensioner module needs replacement?

No. It reports lost communication with Seatbelt Pretensioner Module A. Wiring, connectors, power, ground, or network faults can also interrupt communication, so the circuit should be checked before replacing a module.

Can the vehicle seem normal with this code?

Yes. A communication fault may not change how the vehicle drives, and it may be noticed only through an SRS warning light or a scan. That does not confirm the restraint system is operating normally.

What does Module A identify?

It distinguishes this module in the code definition, but its exact location or relationship to a particular seat depends on the vehicle. Model-, year-, and engine-specific service information is needed.

Is it safe to inspect the wiring myself?

You can look for obvious external damage without touching or disconnecting SRS wiring. Do not probe pretensioner circuits, unplug SRS connectors, or bypass the system; have electrical testing performed by a qualified technician.

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