B0050 on 2013-2016 Dodge DART: Driver Seatbelt Sensor Circuit Causes and Fixes

What's Unique About the 2013-2016 Dodge DART

For the Dodge Dart, this code is notable because FCA (the manufacturer) issued several Technical Service Bulletins (TSBs) and a STAR Case (S2208000089) instructing technicians to check for poorly seated connectors before replacing any parts. If the code persisted, dealers were often advised to contact FCA engineering, suggesting a known, potentially complex issue beyond a simple part failure. This elevates it from a standard repair to one requiring careful diagnosis, starting with the most common and simple fix: ensuring the yellow under-seat harness connector is fully clicked into place.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Airbag warning light is continuously illuminated on the instrument cluster.
• Seatbelt warning light may stay on or flash, even when the belt is buckled.
• An audible seatbelt reminder chime may sound continuously or not at all.

Most Likely Causes

1. Damaged or Disconnected Wiring Under Driver's Seat 🔴 High Probability The wiring harness running under the seat is susceptible to damage from items stored under the seat, or from the seat being moved back and forth repeatedly. The main yellow SRS connector is a known weak point. An FCA STAR Case (S2208000089) specifically calls out checking for poorly seated connectors as a primary diagnostic step for B0050-13. Forum users frequently report that simply unplugging, inspecting, and firmly reconnecting this connector solves the problem.
   How to confirm: Visually inspect the wiring harness and the large yellow connector under the driver's seat for any signs of pinching, chafing, or disconnection. A wiggle test on the harness while monitoring live data with a professional scan tool can help identify intermittent connection issues. The connector should be firmly locked.
   Typical fix: After disconnecting the battery, disconnect and securely reconnect the connector, ensuring it clicks shut. Repair any damaged section of the wire or use zip ties to secure the harness away from the seat rails to prevent future damage.
   Est. part cost: $0-$25
2. Faulty Driver's Seatbelt Buckle Assembly 🟡 Medium Probability The sensor that detects if the belt is latched is integrated into the seatbelt buckle assembly. This internal switch can fail from wear and tear over time, causing an open circuit. Some owners on Reddit have confirmed that replacing the buckle for around $30 from a used parts source resolved their airbag light issue.
   How to confirm: After confirming the wiring is intact, a technician can test the buckle's internal switch for continuity with a multimeter. The resistance should change from very high (open) to very low (near 0 ohms) when the buckle is latched. A professional scan tool can also monitor the switch's status in the live data stream.
   Typical fix: Replace the driver's side seatbelt buckle assembly. This typically involves unbolting the seat to access the buckle's mounting point and electrical connector.
   Est. part cost: $100-$250

Rare But Worth Checking

• Faulty Occupant Restraint Controller (ORC): → Shop Air Bag Control Module While rare, the ORC itself can fail. The TSBs instructing dealers to contact engineering for this code suggest that module-level issues were a concern for the manufacturer. One owner on a Reddit forum reported a dealer quoting over $1000 to replace the module for this issue, though this should only be considered after all wiring and component checks have been exhausted.
• Corroded Inline Seat Connector Terminals: A separate TSB (10-001-23) for other FCA vehicles notes that micro-vibrations can cause corrosion between the male and female terminals of the inline seat connector, leading to B0050-13. This TSB involves replacing the connector itself. While not specific to the Dart, it's a plausible cause.

Diagnosis Steps

1. Read the specific fault codes from the Occupant Restraint Controller (ORC) using a professional-grade scan tool capable of reading SRS codes. Confirm that B0050-13 is active or stored.
2. Disconnect the negative battery terminal and wait at least 10 minutes for the SRS system capacitors to discharge.
3. Perform a thorough visual inspection of the wiring harness and the main yellow electrical connector under the driver's seat. Look for any signs of damage, such as chafed wires, pinched harnesses, or loose connectors.
4. Disconnect and reconnect the main seat harness connector to ensure it is fully seated, as recommended by FCA STAR Case S2208000089. Listen for an audible click.
5. If the light persists, disconnect the buckle connector and check the terminals for corrosion or damage.
6. Using a multimeter, check for continuity through the seatbelt buckle switch. The resistance should be very high (OL) when unbuckled and drop to near zero (less than 1.0 Ω) when latched.
7. If the buckle switch tests good, check for an open circuit in the wiring harness between the buckle connector and the ORC module.
8. If the wiring and buckle are confirmed to be good, the fault may lie with the ORC module itself, though this is the least likely cause.
9. After any repair, the code must be cleared from the ORC using a bidirectional scan tool.

Parts You'll Likely Need

• Driver Seatbelt Buckle (OEM #1SU82DX9AK) — The internal switch that senses the latch is the most common mechanical failure point for this code after wiring issues are ruled out. The part number 1SU82DX9AK supersedes previous versions like 1SU82DX9AI and 1SU82DX9AJ.
  Trusted brands: Mopar
  OEM price range: $150-$250
  Aftermarket price range: $30-$100 (Used/eBay)

Related Codes That Often Appear With This One

• B0052-13 — This is the equivalent code for the 'Passenger Seatbelt Sensor-Circuit Open'. Seeing both together could point to a shared wiring harness issue or a problem with the ORC module. The official TSBs and STAR case list these codes together. [Bulletin #68264880A$, 35]
• B00B5-13 — This code for the 'Driver Seat Track Position Restraint Sensor' is also located under the seat. Its presence with B0050 reinforces the likelihood of a damaged under-seat wiring harness affecting multiple components. [Bulletin #9003579]
• B223D-00 — This indicates an 'OCM DTC Present', meaning the Occupant Classification Module has detected a fault. It's a general code that often appears with more specific sensor faults and is mentioned in the same TSBs as B0050. [Bulletin #68264880A$]

Technical Service Bulletins (TSBs) & Recalls

• Bulletin #68264880A$: Mentions B0050-13 - Driver Seatbelt Sensor-Circuit Open and advises contacting FCA engineering.
• Bulletin #9003579: Also lists B0050-13 and advises contacting FCA engineering, indicating a persistent issue across model years.
• STAR Case #S2208000089: Specifically states that B0050-13 can be caused by a seat belt connector that is not fully seated and advises checking this connection before replacing components.

Platform-Specific Known Issues

• Multiple Manufacturer Technical Service Bulletins (TSBs) exist for the 2013-2016 Dodge Dart regarding this code (e.g., #68264880A$, #9003579). They instruct technicians to contact FCA engineering when this code is found, indicating a known issue that may require special diagnostic procedures.
• FCA STAR Case S2208000089 explicitly identifies that B0050-13 and B0052-13 can be caused by poorly seated driver and passenger seat belt connectors, recommending a simple 'disconnect and reconnect' as the first diagnostic step before replacing parts.

Mechanic-Grade Diagnostic Values

• Driver Seatbelt Buckle Switch Resistance — expected: Infinite resistance or Open Loop (O.L.) when unbuckled; less than 5.0 Ω when buckled.. Failure: Resistance does not change when buckled, or remains high (above 5.0 Ω) when buckled.
• Resistance of Seatbelt Buckle Harness Wiring — expected: Less than 1.0 Ω for the sense and ground circuits measured end-to-end.. Failure: Resistance greater than 1.0 Ω indicates high resistance or an open in the harness itself.
• ORC Fault Detection Time — expected: The ORC module sends a test current every 60-100ms.. Failure: If an open circuit is detected for a continuous 2.5 seconds, the B0050-13 DTC will be set.

Hidden / Shadow Codes Worth Checking

• B0050-11: Driver Seatbelt Sensor - Circuit Short To Ground. (see via A professional-grade scan tool capable of reading SRS module sub-codes, such as wiTECH or AlfaOBD.)
• B0050-12: Driver Seatbelt Sensor - Circuit Short To Voltage. (see via A professional-grade scan tool capable of reading SRS module sub-codes.)
• B0050-2B: Driver Seatbelt Buckle Sensor - Wires Shorted Together. (see via A professional-grade scan tool capable of reading SRS module sub-codes.)

Scan Tool Commands That Help

• wiTECH or equivalent professional scanner: Induce Opposite Fault Test — To confirm the ORC module is functioning. With the buckle connector disconnected (creating an open, B0050-13), a technician can use a jumper wire to short the two terminals in the harness-side connector. A functional ORC will then report a 'Circuit Short' code (e.g., B0050-11). If the code does not change, it points towards a faulty ORC module.
• wiTECH or equivalent professional scanner: View Live Data - Driver Seat Belt Switch Status — To be used during a 'wiggle test'. While monitoring the switch status (which should read 'Buckled' or 'Unbuckled'), wiggling the under-seat harness can reveal intermittent connections if the status flickers without the buckle being operated.

Wiring & Ground Locations

• Occupant Restraint Controller (ORC) — Under the front of the center console, between the two front seats.. This is the module that sets the B0050 code. All wiring for the seatbelt buckle sensor ultimately terminates here, making its connector a final point for diagnostic testing.
• (R57) Driver Seat Belt Switch Sense Circuit — This wire runs from the driver's seatbelt buckle connector to the ORC module. It is located at Pin 20 of the ORC C2 connector.. This is the signal wire the ORC monitors. An open in this wire is a direct cause of code B0050-13.
• (R59) Driver Seat Belt Buckle Switch Ground Circuit — This wire provides the ground reference for the buckle switch. It runs from the buckle connector to Pin 37 of the ORC C2 connector.. A break in the ground wire will also cause an open circuit condition and set the B0050-13 code.
• Main Under-Seat Connector — Under the driver's seat, typically a large yellow connector block joining the seat harness to the body harness.. This is the most common failure point due to physical stress, damage, or corrosion causing an open circuit.

Real Owner Repair Stories

• RamForum.com user 'mrack' (2009 Dodge Ram (4th Gen), with a 2010 seat installed.) — Persistent airbag and seatbelt light with code B0050 after installing a seat from a different model year.
  ❌ Tried (didn't work) Bypassing the sensor by shorting the wires., Leaving the sensor wires open., Verifying pinouts on wiring diagrams.
  ✅ What actually fixed it The user replaced the 2010 driver's seat with a correct 2009 model year power driver seat, which resolved all warning lights. This suggests a potential incompatibility in the SRS components or wiring between closely related model years, even on the same platform.

Model Year Variations Within This Range

• 2013-2016: While no specific part changes have been documented for the Dart in this range, evidence from similar FCA platforms suggests that SRS components like seats and their internal harnesses can have incompatibilities between different model years. Sourcing a used seat or buckle assembly requires matching the part to the specific year of the vehicle, not just the generation, to avoid issues.