What does the B0082 code mean?
The B0082 fault code is a manufacturer-specific OBD-II code. In General Motors (GM) vehicles, it is authoritatively defined as “Discard Right Front/Passenger Side Impact Sensor (SIS)“.
Background Information: This code is part of the Supplemental Restraint System (SRS) diagnostics. It is set by the Sensing and Diagnostic Module (SDM) when it receives an “NOK” (Not OK) status message from the right front side impact sensor, or if the sensor fails to identify itself properly upon startup. The SDM interprets this as an internal sensor fault and “discards” its input, disabling the SRS system and illuminating the airbag warning light. A proper diagnosis always begins with using a professional-grade obd2 scanner capable of accessing the SRS module to confirm this and other related codes.
Symptoms of Error Code B0082
Signs of error B0082 are typically limited to the safety system:
- Illuminated Airbag Warning Light on the instrument cluster, which remains on after startup.
- Possible Driver Information Center (DIC) message such as “Service Airbag” or “Service Restraint System”.
- No drivability issues. The engine and transmission will operate normally.
- Disabled SRS system. The side airbags on the affected side, and potentially the entire system, will not deploy in a collision.
Main Causes of Error Code B0082
- Faulty Right Front Side Impact Sensor: The sensor has an internal electronic failure, which is the most common cause.
- Open or Shorted Circuit: Damaged wiring (cut, pinched, corroded) between the SDM and the sensor can cause communication failure.
- Poor Electrical Connection: Corrosion, bent pins, or moisture in the yellow SRS connector at the sensor.
- Damaged Sensor from Impact: The sensor may have been physically damaged in a prior collision, even a minor one.
- Faulty SDM (Rare): An internal problem with the Sensing and Diagnostic Module itself.
How to Diagnose Error Code B0082?
- SAFETY FIRST: Disconnect the negative battery cable and wait at least 20-30 minutes for the SRS backup power supply to discharge.
- Use an advanced vehicle diagnostics tool with SRS capabilities to confirm B0082. Check for other SRS codes like B0080, B0081, or B0083 which can help pinpoint the issue.
- Perform a thorough visual inspection. Locate the right front side impact sensor (typically mounted low in the B-pillar or door sill). Inspect the wiring harness from the sensor back towards the SDM for any damage, chafing, or corrosion.
- Inspect the sensor’s electrical connector. Disconnect it and look for green/white corrosion, bent pins, or moisture. Clean with electrical contact cleaner if needed.
- Test the circuit using a digital multimeter and a wiring diagram:
- Check for continuity in the two wires between the sensor connector and the SDM connector.
- Check for shorts to ground or voltage on these wires.
- If the wiring checks out, the side impact sensor is almost certainly faulty and must be replaced. These sensors are generally not repairable.
- After repair, clear all codes with the scan tool and verify the airbag light performs a normal bulb check (on for ~5 seconds, then off).
Possible Causes and Diagnostic Methods
| Possible Cause | How to Check? |
| Faulty Side Impact Sensor | Primary cause. Diagnosed by process of elimination after verifying wiring and connections are perfect. Requires replacement. |
| Open Circuit in Wiring | Perform a continuity test on both sensor circuit wires from the SDM pin to the sensor connector pin. |
| Short Circuit (to Ground or Power) | Check for continuity between each sensor circuit wire and chassis ground, and between the two wires themselves. |
| Corroded/Damaged Connector | Visual inspection. Clean terminals, apply dielectric grease, ensure a firm, click-in connection. |
| Previous Accident Damage | Inspect the sensor mounting area and nearby body structure for signs of unrepaired damage that may have affected the sensor. |
Tools needed: A professional SRS-capable obd2 code reader, digital multimeter, basic hand tools, electrical contact cleaner, safety glasses, and vehicle-specific wiring diagrams.
How do I fix error code B0082? (Solutions to the Problem)
Simple Fixes
- Clean and Reconnect: Disconnect the battery, clean the sensor connector thoroughly, apply dielectric grease, and reconnect firmly. This can resolve intermittent issues caused by corrosion.
- Repair Damaged Wiring: If a broken or chafed wire is found, repair it using solder and heat-shrink tubing. Never use twist connectors or electrical tape alone for SRS repairs.
In-depth Diagnosis and Repair Solutions
- Replace the Faulty Side Impact Sensor: This is the most common and definitive repair. Use only an OEM or certified equivalent part. The sensor is usually bolted in place.
- Replace the Wiring Harness Section: If the harness is severely damaged, replacing the affected section is safer than multiple splices.
- SDM Replacement/Reprogramming (Last Resort): If and only if all other components are verified good, the SDM may be faulty. Replacement requires professional programming with a vehicle diagnostics tool like a GM Tech2 or MDI.
- After any component replacement, use your scanner to clear codes and confirm system functionality.
Common Error Code B0082 in Vehicles
General Motors (Buick, Chevrolet, GMC, Cadillac, Saturn, HUMMER): This is the primary application of this specific code definition. Very common in:
- GM Lambda/Theta SUVs (2007-2017): Chevrolet Traverse, Buick Enclave, GMC Acadia, Saturn Outlook. The sensor connectors in the B-pillar are prone to moisture and corrosion.
- GM GMT360/370/305 Platforms (2002-2009): Chevrolet TrailBlazer, GMC Envoy, Buick Rainier, Saab 9-7X, Isuzu Ascender, HUMMER H3. A known issue where wiring or sensor failure triggers the code.
- GM Epsilon II vehicles: Such as the Chevrolet Malibu (2008-2012), where sensor or harness issues occur.
Diagnosis for all requires a professional scanner capable of GM SPS programming for sensor initialization.
Toyota/Lexus (Similar Sensor Faults – Different Codes): While B0082 is GM-specific, similar right side impact sensor faults are coded differently (e.g., B1806 series). Common in Highlander, Camry, Lexus RX. Diagnosis requires Techstream or advanced aftermarket tools.
Honda/Acura: Side impact sensor faults (often codes beginning with B1xxx) are frequently related to water intrusion into connectors in the door sills or B-pillars, especially in models like the Odyssey, Pilot, and CR-V.
Ford/Lincoln/Mercury: Uses its own diagnostic system. Side Impact Sensor (SIS) faults are common in Explorer, Escape, and F-150 models. The wiring boot between the door and body is a common failure point for chafing.
Chrysler/Dodge/Jeep: The Occupant Restraint Controller (ORC) monitors side sensors. Faults are common in Grand Cherokee, Durango, and Chrysler minivans. Diagnosis requires a DRBIII or compatible professional scan tool.
European Vehicles (BMW, Mercedes-Benz, Volkswagen/Audi, Volvo): Side sensor systems are complex. Faults almost always require brand-specific diagnostic software (ISTA, STAR, VCDS/ODIS, VIDA) for accurate coding, calibration, and adaptation after sensor replacement. Common in 3 Series, C-Class, A4, and XC90.
Hyundai/Kia: Prone to electrical gremlins. Side airbag/sensor codes can be triggered by connector issues under seats or in pillars, especially in Sonata, Santa Fe, and Sorento models after interior detailing or water leak events.
Nissan/Infiniti: The side airbag sensor system can set faults if connectors are disturbed. Common in Altima, Rogue, Pathfinder, and Infiniti QX models. Consult the CONSULT-III tool for accurate diagnosis.
B0082 Frequently Asked Questions
What is the first thing I should do when I see code B0082?
Do not ignore it. Use a professional car scanner to confirm the code belongs to the SRS system. Safely disconnect the battery and perform a visual inspection of the right front door sill, B-pillar, and under the right front seat for any obvious wiring damage, loose connectors, or signs of previous water damage.
Is it safe to drive my car with the B0082 code?
No. An illuminated airbag warning light means a fault has been detected and the SRS system is disabled or partially disabled. In a side-impact collision, the side airbags may not deploy, significantly increasing the risk of injury. The vehicle should be repaired before being driven regularly.
What does “Discard” mean in the code description?
In GM SRS terminology, “Discard” means the Sensing and Diagnostic Module (SDM) has determined the signal from the right front side impact sensor is unreliable or faulty. The SDM will therefore ignore (“discard”) any input from that sensor and disable the associated restraint systems for safety.
Will disconnecting the battery clear the B0082 code and turn off the light?
No. SRS codes are stored in non-volatile memory within the SDM. Disconnecting the battery will not erase them. You must use a professional-grade scan tool with SRS reset capabilities to clear the codes after the fault has been repaired.
How much does it typically cost to repair a B0082 error?
Costs vary: Professional diagnosis: $100-$200. A new OEM side impact sensor: $150-$400. Labor for replacement: 1-2 hours ($100-$250). If wiring repair is needed, add $100-$200. Total typically ranges from $350 to $850+. SDM replacement is much more expensive ($1000+).
Can I replace the side impact sensor myself?
Only if you are highly skilled, have the proper tools, and follow strict SRS safety protocols (disconnect battery, wait, handle components carefully, avoid static). The sensor must be torqued to spec and the system may require initialization with a professional scan tool. For most, this is a job for a qualified technician.
My car was in an accident, and then B0082 appeared. Why?
The side impact sensor is designed to detect crashes. Even a minor impact can damage the sensor internally, causing it to send a fault signal to the SDM, which then sets B0082. The sensor and its mounting area should be carefully inspected after any collision.
What’s the difference between B0082 and B0080 or B0081?
All are GM SRS side impact sensor codes. B0080: Left Front Sensor Circuit Fault. B0081: Left Front Sensor Internal Fault (“Discard”). B0082: Right Front Sensor Internal Fault (“Discard”). B0083 would be the Right Front Sensor Circuit Fault.
Will the front airbags still work if B0082 is set?
Possibly, but it’s not guaranteed. The SDM may disable the entire SRS system, including front airbags, if it determines a critical sensor is faulty. You must assume the system is disabled until repaired.
Do I need to reprogram the car computer after replacing the sensor?
On most modern GM vehicles, yes. The new sensor often needs to be “learned” or initialized by the SDM using a professional scan tool with SPS programming capabilities (e.g., GM Tech2, MDI, or a high-end aftermarket tool with this function). Simply bolting in a new sensor may not clear the code.
Could a problem with the seat or seat track cause B0082?
No. B0082 is specific to the side impact sensor mounted on the vehicle’s body structure (B-pillar or rocker panel). Issues with the seat or its position sensors would set different codes (e.g., B0012, B0013 for passenger presence).
My code is intermittent—the light comes on and off. What does that mean?
An intermittent B0082 almost always points to a poor electrical connection. This could be a corroded connector, a wire that is almost broken and makes contact only sometimes, or a sensor that is beginning to fail. The diagnostic steps (visual inspection, continuity check) are the same.
B0082 Related OBD2 Errors
- B0080: Left Front Side Impact Sensor (SIS) Circuit
- B0081: Discard Left Front Side Impact Sensor (SIS)
- B0083: Right Front Side Impact Sensor (SIS) Circuit
- B0084: Left Rear Side Impact Sensor (SIS) Circuit
- B0085: Discard Left Rear Side Impact Sensor (SIS)
- B1015: SIS System Malfunction (Chrysler/Ford equivalent system codes)
- U1000: Class 2 Communication Malfunction (can accompany sensor comm failures)
Critical Safety Warning: The Supplemental Restraint System (SRS) contains explosive devices (inflators). Improper diagnosis, testing, or repair can cause accidental deployment, resulting in serious injury or death. Always follow the manufacturer’s safety procedures. If you lack the specific training, tools, or confidence, this repair must be performed by a qualified automotive technician.