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DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B0083

B0083Passenger Seatbelt Pretensioner Loop Short to Ground

B0083 means the restraint control module has detected an abnormally low resistance, or a direct short to ground, in the passenger seatbelt pretensioner circuit. The module monitors the loop's voltage and current and flags this code when the circuit draws more current than expected or the return line shows near-zero resistance to chassis ground.

SystemBody
Code typeGeneric (all makes)
SeverityHigh
Fix difficultyProfessional
AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

  • The supplemental restraint system (SRS) warning light stays illuminated on the dashboard.
  • The passenger seatbelt pretensioner may not deploy in a collision, increasing injury risk.
  • Some vehicles disable the entire passenger-side airbag and pretensioner system while the fault is active.
  • Often no symptoms besides the warning light, with the seatbelt latching and retracting normally.
  • In rare cases, a chafed harness may cause intermittent warning light flicker over bumps.

Common causes, most likely first

  1. A damaged passenger seatbelt pretensioner connector or corroded terminals at the pretensioner pigtail.
  2. A pinched or chafed wire in the passenger seatbelt pretensioner loop shorting against the seat frame or floorpan.
  3. Moisture intrusion into the pretensioner connector or the lower body harness causing a ground path.
  4. An internally shorted passenger seatbelt pretensioner squib, often after a prior deployment or impact.
  5. A short to ground inside the restraint control module (RCM) connector or the module itself.
  6. Aftermarket accessories or seat removal work that pinched the pretensioner harness during reassembly.

How to diagnose and fix it

  1. Disconnect the battery and wait the manufacturer-specified time, then inspect the passenger seatbelt pretensioner connector for corrosion, bent pins, or water intrusion.
  2. Check the pretensioner harness routing under the passenger seat and along the sill for chafing, pinches, or contact with sharp metal.
  3. Measure resistance from the pretensioner loop terminals to a clean chassis ground with the module disconnected; a near-zero reading confirms a short to ground.
  4. Isolate the fault by disconnecting the pretensioner and rechecking the code; if the code changes to an open circuit, the short is in the pretensioner or its pigtail.
  5. If the harness and pretensioner test good, inspect the RCM connector for corrosion or a shorted terminal and substitute a known-good module only after all wiring checks pass.
  6. Repair or replace the damaged harness section or pretensioner assembly, then clear the code and verify the SRS light extinguishes and stays off through a full key cycle.

What a pretensioner short really means

  • A short to ground in the pretensioner loop often comes from a pinched harness under the passenger seat after seat removal or cargo loading, not from a failed pretensioner.
  • The code can set intermittently from moisture in the connector, so a wiggle test and a look for water tracks are more useful than immediately replacing parts.
  • Disconnecting the pretensioner and seeing the code change to an open-circuit code is the fastest way to prove whether the short is in the pretensioner or the vehicle harness.
  • A shorted pretensioner squib can read near-zero ohms on a meter, but never probe a live squib circuit with the battery connected; always follow the manufacturer's disarm procedure.
  • Some vehicles set B0083 when the passenger seat occupancy sensor or its wiring disturbs the shared ground path, so check for related body codes before condemning the pretensioner.

Can I keep driving with B0083?

The vehicle is not safe to drive because the passenger pretensioner and often the passenger airbag are disabled while this code is active. Have the fault diagnosed and repaired before carrying a passenger, and avoid any impact until the SRS light is off.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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