B0085:05 Code - Left Front Side Impact Sensor High Voltage/Open
Quick Answer
The impact sensors are equipped on vehicles to supplement the supplemental inflatable restraint (SIR) system performance. Common causes include Faulty Left Front Side Impact Sensor, Left Front Side Impact Sensor harness is open or shorted, Left Front Side Impact Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B0085:05 indicates Left Front Side Impact Sensor High Voltage/Open.
- Common causes
- Common causes include Faulty Left Front Side Impact Sensor, Left Front Side Impact Sensor harness is open or shorted, Left Front Side Impact Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B0085:05 Description
What are the Possible Causes of the DTC B0085:05?
- Faulty Left Front Side Impact Sensor
- Left Front Side Impact Sensor harness is open or shorted
- Left Front Side Impact Sensor circuit poor electrical connection
- Faulty Inflatable Restraint Sensing and Diagnostic Module (SDM)
How to Fix the DTC B0085:05?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B0085:05 Left Front Side Impact Sensor High Voltage/Open
B0085:0F Left Front Side Impact Sensor Signal Erratic
B0085:39 Left Front Side Impact Sensor Internal Malfunction
B0085:3A Left Front Side Impact Sensor Incorrect Component Installed
B0085:71 Left Front Side Impact Sensor Invalid Data
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B0085:05 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the B0085:05 code?
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Need Help with the Code?
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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about B0085:05 Code
No Frequently Asked Questions about B0085:05 Code found.
Discuss the causes and fixes for B0085:05 OBDII Code
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2015 Chevy 2500 HD B0085-05 Left Front Side Impact Sensor High Voltage/Open. I have this code and im not sure where to start the truck will not read nything then the iccm fuse keeps popping then after some time the truck will start if i unplug the left front side impact sensor and everything in the door. iccm fuse still pops. checked the pigtail for the air bag sensor and no voltage need help please.
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At this point, I would stop focusing only on the side impact sensor itself and start looking for a shorted wiring harness or module issue, because a fuse repeatedly popping means something is pulling too much current on that circuit.
The important clue is this:
• The truck will sometimes start after unplugging the left side impact sensor and door components
• But the ICCM fuse still pops eventuallyThat tells me the problem may not actually be the sensor — it may be wiring damage somewhere in that circuit.
On these HD trucks, the first places I would inspect are:
• Driver door harness in the rubber boot between the door and body
Very common spot for wires to break, rub through, or short together from years of opening/closing the door.• Harness under the driver-side kick panel / sill plate
Water intrusion and rubbed wires happen there.• Side impact sensor connector and wiring
Look for corrosion, green terminals, or wires rubbed against metal.• Trailer brake controller / aftermarket accessories
Since the ICCM fuse is involved, sometimes aftermarket wiring tied into ignition or CAN circuits causes weird airbag/network problems.One very important thing:
Do NOT apply voltage directly to airbag sensor circuits. The SRS system is sensitive and should be tested carefully with proper procedures.The fact that you’re not seeing voltage at the sensor connector is not necessarily abnormal — many airbag circuits use low-current reference signals and are monitored differently than standard power circuits.
The best next step is:
• Disconnect the battery
• Remove the ICCM fuse
• Inspect the driver door/body harness inch by inch for rubbed or pinched wires
• Look especially for any wire touching metal or melted togetherHonestly, based on your symptoms, I would bet on a harness short rather than a failed side impact sensor itself.
The popping fuse is your biggest clue — sensors usually set codes, but they normally do not blow fuses repeatedly unless the wiring is damaged.
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