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DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B00E8

B00E8Third Row Center Seat Belt Pretensioner C Deployment Control

B00E8 indicates that the restraint control module (RCM) has detected a deployment circuit fault in the third row center seat belt pretensioner, which is the pyrotechnic device that retracts the belt during a crash. The module monitors the circuit's resistance and continuity, and it sets this code when the measured values fall outside the expected range or when the deployment command cannot be verified.

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

Symptoms you may notice

  • The airbag or supplemental restraint system (SRS) warning light stays illuminated on the dashboard.
  • A chime or message may appear indicating a restraint system fault, depending on the vehicle.
  • The seat belt pretensioner may not deploy in a collision, reducing occupant protection.
  • Often no symptoms besides the warning light, because the fault is electrical and does not affect normal belt latching.
  • In some vehicles, other restraint functions may be disabled or the system may enter a default mode.

Common causes, most likely first

  1. A damaged or disconnected electrical connector at the third row center seat belt pretensioner.
  2. Corroded or broken wiring in the circuit between the RCM and the pretensioner, often due to seat movement or cargo interference.
  3. A faulty seat belt pretensioner assembly with an open or shorted internal squib.
  4. Water intrusion or physical damage to the pretensioner or its connector from spills or cargo.
  5. A defective restraint control module (RCM) that incorrectly reports the circuit fault.
  6. Aftermarket accessories or previous repairs that disturbed the SRS wiring.

How to diagnose and fix it

  1. Inspect the third row center seat belt pretensioner connector for looseness, corrosion, or damage, and reseat it firmly.
  2. Check the wiring harness for chafing, pinches, or breaks along the path from the RCM to the pretensioner, especially near seat hinges and cargo areas.
  3. Measure the resistance of the pretensioner squib circuit with a digital multimeter and compare it to the manufacturer's specification.
  4. If resistance is out of range, disconnect the pretensioner and measure the circuit from the RCM side to isolate whether the fault is in the wiring or the pretensioner.
  5. Substitute a known-good pretensioner or use a simulator to verify whether the code changes, following all safety precautions for handling pyrotechnic devices.
  6. If the circuit and pretensioner test good, check for technical service bulletins or known issues with the RCM, and perform module diagnostics as directed.
  7. After any repair, clear the codes and verify that the SRS warning light goes out and remains off during a test drive.

Hidden causes of third row pretensioner faults

  • A common oversight is assuming the pretensioner itself is defective when the real problem is a connector that has been disturbed by folding or sliding the third row seat.
  • Cargo shifting in the rear can pinch or damage the pretensioner wiring, so always inspect the harness routing before replacing parts.
  • The code can be set by a low battery or voltage spike that temporarily disrupts the RCM, so check the charging system and battery health first.
  • Some vehicles require the RCM to be reprogrammed or configured after replacement, and a used module may not be plug-and-play.
  • Never use a standard ohmmeter on an undeployed pretensioner without following the manufacturer's safety procedures, as accidental deployment can cause serious injury.

Can I keep driving with B00E8?

The vehicle remains driveable, but the third row center seat belt pretensioner may not function in a crash, so avoid carrying passengers in that seat until the fault is repaired. Have the system diagnosed promptly, and do not attempt to repair SRS components without proper training and tools.

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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