OBD-II Code B1092: Body Control Module Circuit Fault

What Does B1092 Mean?

B1092 is a manufacturer-specific Body Diagnostic Trouble Code (DTC) indicating an electrical circuit failure in a non-powertrain system. Unlike 'P' codes for the engine, 'B' codes flag issues in components controlling comfort, convenience, and safety. The exact meaning of B1092 changes entirely depending on your vehicle's make and model, requiring a manufacturer-specific scanner definition before attempting repairs.

Technical definition: The SAE/ISO definition of B1092 varies by manufacturer. Common definitions include 'Front Left Seat Heater Control Circuit Low' (Jeep/Chrysler), 'Motor for Recirculation Flap - Mechanical Failure' (Audi/VW), 'Air Flow Control 7 Circuit Short to Ground or Open' (Ford), 'Active Hood System Fault' (Hyundai), and 'Poor reception of ETACS signal' (Mitsubishi).

Can I Drive With B1092?

Yes, But With Caution. Yes, for most vehicles. B1092 typically disables comfort features like heated seats or climate control without affecting drivability. However, Hyundai owners face a disabled 'Active Hood System,' which increases pedestrian injury risk in an accident and causes safety inspection failures.

Common Causes

• Failed Heated Seat Element (Very Common) — In Jeep, Chrysler, and Dodge vehicles, the heating element grid inside the seat back breaks or shorts out. This drops the circuit resistance below the 4-5 ohm specification, triggering the code. This failure peaks in cold weather (Jeep TSB 08-049-14).
• Failed HVAC Blend Door or Recirculation Flap Motor (Common) — On Audi and GM vehicles, this code flags a mechanical failure of a climate system airflow motor. The motor burns out or its plastic gears strip, preventing the flap from reaching its commanded position.
• Damaged Wiring or Connectors (Common) — Wires under seats, behind the dashboard, or in door jambs become pinched, frayed, or disconnected from movement. Connectors suffer from corrosion or backed-out pins, causing poor electrical connections.
• Failed Audio Amplifier or Speaker (Common) — On General Motors vehicles, B1092 points to a fault in the 'Audio Output #7 Circuit.' A failed speaker creates a short or open in the circuit, or the audio amplifier fails internally.
• Active Hood System Fault (Less Common) — In Hyundai models, B1092 indicates a problem with the pedestrian protection 'Active Hood System.' The root cause is typically a faulty acceleration sensor, damaged wiring, or a failed hood lifting actuator.
• Faulty Blower Switch or ETACS-ECU (Mitsubishi) (Less Common) — On Mitsubishi models, B1092 indicates a communication error between the blower switch and the main body control unit (ETACS-ECU). A faulty switch or wiring problem interrupts the signal.
• Faulty Control Module (Rare) — The module controlling the specific function (Heated Seat Module, Body Control Module, or HVAC Module) fails internally. Suspect this only after ruling out wiring and component failures.
• Blown Fuse or Faulty Relay (Rare) — A blown fuse is a less frequent cause for this specific code, which usually points to a circuit integrity issue rather than a complete power loss. Check relays for circuits like Daytime Running Lights on Fords.

Symptoms

• Heated Seat Inoperative — The heated seat button light turns on for two seconds and immediately turns off (common in Jeep/Chrysler).
• Incorrect HVAC Operation — Air only blows from certain vents, the system cannot switch to recirculated air, or a clicking sound emanates from the dashboard (common in Audi/Ford).
• Active Hood / Pedestrian System Warning Light — A specific warning light for the pedestrian safety system illuminates on the dashboard, often accompanied by the airbag light (Hyundai).
• Daytime Running Lights Not Working — One or both daytime running lights fail to illuminate. The code returns immediately after clearing (Ford/Jaguar/Land Rover).
• Loss of Audio from a Specific Speaker — One speaker in the audio system produces no sound, corresponding to the specific output circuit flagged by the BCM (GM).
• Blower Fan Inoperative or Intermittent — The heater and A/C fan fails to turn on or works sporadically (Mitsubishi).
• Fault Code Stored in BCM (scan-tool only — no driver-felt sign) — The B1092 code is stored in the Body Control Module (BCM) or a related subsystem module, requiring an advanced scan tool to read.

Diagnostic Flowchart

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

Common Fixes & Costs

• Replace Heated Seat Element(s) — Parts: $100-$300, Labor: $400-$700, ~3.5 hr book time (Intermediate)
• Replace HVAC Recirculation Flap Motor — Parts: $100-$200, Labor: $400-$800, ~4 hr book time (Intermediate)
• Repair Damaged Wiring or Connector — Parts: $10-$50, Labor: $150-$450, ~2 hr book time (DIY)
• Replace DRL Module or Headlight Assembly — Parts: $40-$1200, Labor: $100-$350, ~1 hr book time (Intermediate)
• Repair/Reset Active Hood System — Parts: $150-$600, Labor: $150-$400, ~1.5 hr book time (Professional)
• Replace Body Control Module (BCM) or other Module — Parts: $400-$900, Labor: $150-$400, ~2.5 hr book time (Professional)

Used vs. New Parts: Buying Guide

When a used part is worth it: For HVAC actuators and modules, a tested used part from a reputable auto recycler is a cost-effective option for older vehicles. Buy new heated seat elements, as used elements have an unknown history and require high labor to replace.

Donor-vehicle mileage cap: roughly under 100000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the part number matches exactly; modules look identical but have different programming.
• Ensure the donor vehicle was not scrapped due to flood or electrical fire damage.
• Purchase from sellers offering a 30-90 day warranty.

Decision logic:

• If The part is a heating element or a known wear item. → Buy new. The risk of premature failure outweighs the savings.
• If The part is an expensive electronic module (BCM, HVAC) and the vehicle is over 10 years old. → A tested, warrantied used part is a reasonable choice.
• If The part is for a critical safety system (e.g., Hyundai Active Hood actuator). → Buy new OEM parts to ensure reliability.

Warranty tradeoff: Used parts include a 30-90 day warranty covering the part only. New aftermarket parts offer 1-year warranties. New OEM parts carry a 1-2 year warranty, often including labor if dealer-installed.

Worst-case if a used part fails: $300-900 if a used part fails, requiring repeat labor and a second replacement part.

What Happens If You Wait — Timeline

1. 0-1 month: The warning light appears, and the associated function stops working. For comfort features, this is an annoyance. For a Hyundai Active Hood fault, a critical safety system is disabled. (MPG impact: 0%% · Added cost: $0)
2. 1-6 months: The issue becomes permanent. A stuck blend door causes defrosting issues. Continued flexing of damaged wiring leads to a short circuit, blowing a fuse. (MPG impact: 0%% · Added cost: $0 - $5 (for a blown fuse))
3. 6-12 months: No significant further damage occurs. An HVAC motor makes a continuous clicking noise. The Hyundai Active Hood fault causes safety inspection failures. (MPG impact: 0%% · Added cost: $0)
4. 12+ months: In rare cases, a short-to-ground creates a parasitic battery drain, leading to a dead battery if the vehicle sits for an extended period. (MPG impact: 0%% · Added cost: $0 - $250 (for a new battery))

Cost of Not Fixing It

• Immediate: Loss of function for the affected component (e.g., no heated seat, incorrect A/C temperature, inoperative DRL). (Added cost: Negligible)
• 1-6 months: A stuck HVAC blend door strains the blower motor. Driving with a disabled Hyundai Active Hood increases liability and pedestrian injury risk in an accident. (Added cost: $0 - Potential legal/liability costs)
• 6+ months: Ongoing lack of functionality. A rare circuit short drains the battery over time. (Added cost: $0 - $250 (for a new battery if drained))

Diagnosis Steps

1. Identify the Specific Definition for Your Vehicle
   Use an advanced OBD-II scanner capable of reading manufacturer-specific 'B' codes and subtype digits (e.g., B1092:14 or B1092 07). The scanner's definition dictates which system to test (e.g., 'Heated Seat', 'HVAC Flap', or 'DRL Relay'). Basic $20 scanners cannot read these codes.
   Tools: Advanced OBD-II Scanner (Beginner)
2. Check for Technical Service Bulletins (TSBs)
   Search online for your vehicle's make, model, year, and code B1092. Manufacturers issue bulletins for common problems, saving hours of diagnostic time. Jeep TSB 08-049-14 and Audi TSB 2055257/1 directly address this code.
   Tools: Internet Access (Beginner)
3. Perform a Visual Inspection
   Inspect the area identified by the code definition. Look under the seat for damaged wires, inspect wiring under the dashboard for HVAC issues, or check front bumper sensors for an Active Hood fault.
   Tools: Flashlight (Beginner)
4. Test Component Resistance (Example: Jeep Heated Seat)
   Disconnect the component's electrical connector. Using a multimeter set to Ohms (Ω), measure the resistance across the component's pins. A good Jeep heated seat element reads 4-5 ohms. 'O.L.' indicates a broken element, while near 0 ohms indicates a short circuit.
   Tools: Multimeter, Vehicle-Specific Wiring Diagram (Intermediate)
5. [Pro Tip] Actuate Component with Scan Tool
   For HVAC flap motors, use a bidirectional scan tool to command the motor to move. If it doesn't move or makes a clicking/grinding noise, the motor has failed mechanically. This confirms the motor receives the command but cannot execute it.
   Tools: Advanced Bidirectional Scan Tool (Advanced)
6. Check Fuses and Relays
   Locate the fuse box and test the fuse for the flagged component using a multimeter. Swap the component's relay with an identical one from a non-critical system to see if the problem moves.
   Tools: Owner's Manual, Multimeter or Fuse Tester (Intermediate)
7. Test the Wiring Harness
   With the component and control module disconnected, use a multimeter to check for continuity on the power and ground wires running between them. Test for a short to ground by checking for continuity between the power wire and a known good chassis ground.
   Tools: Multimeter, Vehicle-Specific Wiring Diagram (Advanced)
8. [Pro Tip] Perform a Load Test on the Circuit
   For high-current components like heated seats or DRLs, a resistance test is insufficient. Use a Power Probe or high-amperage test light to apply power through the circuit. A dim light indicates high resistance in the wiring that a multimeter misses.
   Tools: Power Probe or High-Amperage Test Light (Advanced)
9. [Pro Tip] Check Specific Pin Voltages (Mitsubishi ETACS)
   For Mitsubishi B1092 faults, disconnect the B-232 ETACS-ECU connector. With the ignition and blower switch ON, measure voltage between terminal 24 on the harness side and a body ground. A reading of 0V indicates an open circuit in the power supply line.
   Tools: Multimeter, Vehicle-Specific Wiring Diagram (Advanced)
10. [Pro Tip] Check Live Data PIDs (Heated Seats)
    Monitor live data from the Heated Seat Module (HSM) using an advanced scan tool. Look for 'Driver Seat Heater Element Resistance.' If the module reports an out-of-spec value that contradicts your manual multimeter test at the seat connector, suspect a module fault.
    Tools: Advanced OBD-II Scanner with Live Data (Advanced)

When This Code Triggers (Freeze-Frame Conditions)

• Ignition/Power Status: ON (The fault is detected when the ignition is on and the relevant module receives power.)
• Component Command State: Active/On (The code sets when the driver attempts to use the affected feature (e.g., turning on the heated seat).)
• Ambient/Cabin Temperature: < 40°F (5°C) (For Jeep/Chrysler heated seat faults, the code sets during cold weather when low temperatures cause the element's resistance to drop out of specification.)
• Battery Voltage: 11.5-14.5V (The fault logs during normal vehicle operating voltage.)

Related Codes

• B1096 — This is the identical fault for the opposite side of the vehicle. In a Jeep, B1092 is the left seat, while B1096 is the right seat. TSB 9002829 requires replacing both seat back heater pads simultaneously.
• B2010 — On Audi vehicles, B2010 ('No Basic Setting') appears with B1092. B1092 indicates the mechanical motor failure, while B2010 indicates the system lost calibration. You must perform a 'Basic Setting' adaptation after replacing the motor to clear B2010.
• B1084 / B1085 — In Mitsubishi systems, B1092 indicates a general ETACS signal error. B1084 indicates an 'Open Circuit' in the blower switch wiring, while B1085 indicates a 'Short Circuit'.
• B11AF — On Audi vehicles, this code for 'Regulator motor of fresh air flap, mechanical fault' is the companion to B1092's recirculation flap fault. They often fail around the same time.

Climate & Environmental Factors

• Cold Weather: Low temperatures (below 10°F / -12°C) cause the resistance of a failing Jeep heated seat element to drop below the manufacturer's threshold, triggering the 'Circuit Low' fault.
• High Humidity / Water Ingress: Moisture corrodes electrical connectors on HVAC blend door actuators. On Jaguar/Land Rover vehicles, water leaks past the cowl panel seal into the blower motor area.

How to Talk to a Mechanic About This Code

Say this: "I have a B1092 code on my [Make, Model, Year] and the [symptom, e.g., 'driver's heated seat turns off instantly' or 'A/C is making a clicking noise']. I'd like to schedule a diagnostic to confirm the specific fault for my vehicle."

This connects the code to a specific symptom, focusing the technician's diagnostic time and preventing them from replacing unrelated parts.

Avoid saying:

• 'My check engine light is on.' (Too vague, invites an expensive diagnostic).
• 'I think the Body Control Module is bad.' (Don't diagnose the part for them).
• 'Just fix whatever is wrong.' (Invites unnecessary repairs and upselling).

Questions to ask before authorizing the repair:

• What is the specific definition of B1092 for my vehicle, including any suffix numbers?
• What was the result of your diagnostic test? (e.g., 'What was the resistance reading on the heated seat element?').
• Is there a Technical Service Bulletin (TSB) for this issue?
• Is the proposed fix to repair a wire or replace an entire assembly?
• What is the warranty on the parts and labor for this specific repair?

Where to Take It: Dealer vs Independent vs Chain

• Dealer: Recommended for Audi, Hyundai, Mitsubishi, or any vehicle requiring module programming or calibration after the fix.
  Best for: Vehicles under warranty., Complex manufacturer-specific issues (e.g., Hyundai Active Hood, Audi HVAC motor needing software updates)., Repairs requiring module programming.
  Downsides: Highest labor rates and part costs., Defaults to replacing entire assemblies instead of repairing smaller components. (Typical cost: +50% vs. baseline)
• Independent Shop: Best fit for the Jeep/Chrysler heated seats and general wiring issues. Vet the shop by asking if they perform body electrical diagnosis.
  Best for: Common, well-documented B1092 causes (e.g., Jeep heated seats)., Out-of-warranty vehicles where cost is a primary concern., Wiring and electrical diagnostics.
  Downsides: Quality and diagnostic tool capability vary greatly. Ensure they have advanced scanners., Lacks access to the latest manufacturer software updates. (Typical cost: +0% vs. baseline)
• Chain Shop: AVOID. B1092 requires specific diagnostic capabilities beyond the scope of most chain shops.
  Best for: Simple jobs like tires, brakes, and oil changes.
  Downsides: Technicians and tools are unequipped for specific 'B' code diagnostics., High risk of misdiagnosis or upselling unnecessary services. (Typical cost: -10% vs. baseline)

When to Walk Away From the Repair

If the estimated repair cost exceeds 40-50% of your car's private-party value, seriously consider selling or trading it in instead of repairing it.

• Car worth $15000, fix is $1200: Fix it. The repair cost for a heated seat or HVAC motor is well below the threshold.
• Car worth $4000, fix is $1500: Borderline. The repair is almost 40% of the car's value. If the broken feature isn't critical, live with it. If it's a safety system (Hyundai Active Hood), fix it.
• Car worth $2500, fix is $1500: Walk away. Spending 60% of the car's value on a comfort feature is a poor financial decision.

What Scan Tool You Need for This Code

Minimum: A scanner that reads manufacturer-specific Body ('B') trouble codes. A basic code reader that only handles powertrain ('P') codes is insufficient.

A standard $20 code reader only communicates with the Engine Control Module. B1092 lives in the Body Control Module. You will waste time and money guessing without the correct scanner.

Budget: Autel AP200 / Topdon TopScan (~$60) — These Bluetooth dongles offer full-system scanning, including the BCM, allowing you to read and clear B1092 and see its manufacturer-specific definition.

Mid-range: Foxwell NT510 Elite / Innova 5610 (~$180) — These handheld scanners offer full-system diagnostics plus bidirectional controls. This allows you to command the Audi HVAC flap motor to move, confirming a mechanical failure.

Professional: Autel MaxiCOM MK808S / Launch X431 Series (~$450-900) — Provides professional-level diagnostics, robust bidirectional controls, and advanced service functions like module coding and adaptation (required for Audi HVAC motor replacement).

Rent vs buy: Auto parts stores rent out basic code readers that CANNOT diagnose a B1092 code. Buying a budget-tier tool like the Autel AP200 costs less than a single diagnostic fee at a shop.

How to Clear the Code After You Fix It

1. Reconnect the negative battery terminal if disconnected.
2. Use a compatible OBD-II scan tool to navigate to the Body Control Module (or specific subsystem) and clear the DTCs.
3. For Audi HVAC motors, run a 'basic settings' or 'adaptation' procedure with the scan tool to calibrate the new part.
4. Cycle the ignition off and on, then operate the repaired function to confirm the fix.

Drive cycle (~15 minutes): Body codes do not require a complex drive cycle. After clearing the code, a key-on, key-off cycle and activation of the repaired component allows the module to re-run its self-test. A 15-minute drive confirms the fix.

Readiness monitors affected: None

Watch out for:

• Disconnecting the battery does not clear the code; a scan tool is required.
• The code returns immediately if the hardware fault remains.
• Skipping the calibration/adaptation step after replacing an Audi HVAC motor causes B1092 and a new B2010 code to persist.

Will This Fail Emissions / State Inspection?

No — by itself this code doesn't fail OBD inspection (but it can keep readiness monitors from setting, which causes a separate fail).

• California: B1092 does not cause an OBD-II emissions test failure. However, an illuminated warning light (like the airbag light for a Hyundai Active Hood fault) results in a visual inspection failure.
• New York: NYS inspection checks safety equipment. A non-functional DRL or an illuminated airbag/safety system light guarantees a failure.
• Texas: B1092 passes the emissions test, but an illuminated safety system light causes a failure in commercial vehicles or personal vehicles prior to the 2025 safety inspection exemption.

Most Commonly Affected Vehicles

• Jeep Wrangler (JK) (2011-2018) — Extremely common for 'Front Left Seat Heater Control Circuit Low' due to failing seat elements (TSB 08-049-14). Replacement elements feature a more durable design.
• Audi A4, S4, A5, Q5, Q7 (2017-2022) — Prone to B1092 07 for 'Motor for Recirculation Flap - Mechanical Failure'. TSB 2055257/1 addresses this. The replacement motor (4M0 820 511 A) is a robust Magna design.
• Ford Focus, Mondeo, Transit (2012-2018) — Relates to HVAC or Daytime Running Lights. The suffix code is critical: B1092:14 means 'Circuit Short to Ground or Open', while B1092:12 means 'Circuit Short to Battery'.
• Chevrolet / General Motors Tahoe, Yukon, Escalade, Camaro (2007-2014) — Defines B1092 as 'Audio Output #7 Circuit Low', pointing to a failed speaker or amplifier. Also relates to rear HVAC blend door actuators or a failed DRL module.
• Hyundai Tucson (2016-2021) — B1092 refers to a fault in the 'Active Hood System'. A faulty acceleration sensor is a common cause, not just the hood actuators.
• Chrysler/Dodge Various models with heated seats (2011-2016) — Shares the same heated seat element design flaw as the Jeep Wrangler, leading to the same B1092 code and symptoms.
• Mitsubishi Lancer, Outlander (2008-2015) — Defines B1092 as 'Poor reception of ETACS signal', pointing to a fault with the blower switch or its connection to the main body control unit.
• Jaguar / Land Rover Discovery Sport, Evoque, Jaguar XF (2015-2019) — Indicates a fault with the 'Right Daytime Running Lamp' or HVAC system faults caused by water ingress into the blower motor area.

Manufacturer-Specific Notes

• Jeep/Chrysler/Dodge: TSB 9002829 instructs dealers to replace the seat BACK heater pads on BOTH front seats, even if only one side fails, to prevent a comeback. This repair is covered under Mopar extended warranty plans.
• Ford: The meaning of B1092 is highly inconsistent, referring to HVAC blend doors or daytime running lights. A suffix (e.g., B1092:12 or B1092:14) is mandatory for diagnosis.
• Audi/Volkswagen: When B1092 appears for an HVAC flap motor, TSB 87-20-03 recommends a climate control module software update alongside the motor replacement. A 'basic setting' adaptation is required afterward.
• Hyundai: On the Tucson, B1092 is tied to the 'Active Hood System' for pedestrian protection. Diagnosis requires checking hood sensors and actuators, a departure from typical comfort causes.
• Mitsubishi: B1092 points to a communication error between the blower switch and the main body ECU (ETACS). Diagnosis requires checking specific ECU connector pins for voltage.

Real Owner Stories

2012 Jeep Wrangler with 110K miles

The driver's side heated seat light turned on for two seconds and immediately shut off during a cold winter.

What they tried:

1. Checked the fuse for the heated seats, which was fine.
2. Visually inspected wiring under the seat and found no damage.
3. Used a multimeter to test the resistance of the seat back heating element and got a reading of 1.2 ohms, well below the 4-5 ohm specification.

Outcome: The owner replaced the driver's side seat back heating element. The repair took 3 hours and involved removing the seat and upholstery. The heated seat functioned normally afterward.

Lesson: A simple multimeter resistance test at the under-seat connector confirms a failed element in minutes. The failure is almost always the seat back element, not the cushion.

2018 Audi S4 with ventilation malfunction

The heater vents closed on their own, and the dashboard made a clicking noise. The shop pulled codes B1092 07 ('Motor for recirculation flap – mechanical failure') and B2010 00 ('No basic setting').

What they tried:

1. A shop followed Audi's technical bulletins pointing to a common recirculation flap motor failure.

Outcome: The shop performed a software update on the A/C control module and replaced the recirculation flap motor. They cleared the B2010 code by performing a 'basic setting' adaptation.

Lesson: A mechanical failure (B1092) causes a secondary calibration failure code (B2010). The new component must be calibrated to the system with a scan tool.

2021 Hyundai Tucson with 'Active Hood Fault' warning

The 'Active hood fault' message appeared on the dashboard along with the airbag warning light. The hood had not deployed.

What they tried:

1. The owner took the vehicle to a workshop for diagnosis.

Outcome: The workshop diagnosed a faulty acceleration sensor. The sensor was replaced for approximately $350, resolving both the warning message and the airbag light.

Lesson: Don't assume a B1092 code means the expensive hood actuators failed. The fault is often a less expensive component like the acceleration sensor.

How to Prevent This Code From Triggering

• Avoid kneeling or placing heavy, sharp objects on seats. (Daily habit) — Concentrated pressure breaks the delicate grid of fine wires inside the seat cushion, creating an open circuit and causing the heater to fail.
• Periodically clean and protect under-seat wiring. (Once per year) — Spilled drinks and road salt corrode sensitive electrical connectors under the seat. Vacuuming and ensuring connectors are dry prevents connection failures.
• Run the A/C recirculation motor periodically. (Monthly) — Cycling the recirculation button keeps the motor and its gears moving, preventing the flap motor from seizing due to lack of use.
• Keep the cabin air filter clean. (Every 12-15k miles) — A clogged cabin air filter restricts airflow, forcing the HVAC blower motor and actuators to work harder, contributing to premature failure.
• Don't run heated seats with the engine off for extended periods. (As needed) — Heated seats draw around 7 amps each. Repeatedly using them in accessory mode deeply discharges the battery, straining the alternator over time.

Frequently Asked Questions

What are common misdiagnosis mistakes for B1092?

The biggest mistake is assuming the code means the same thing across all manufacturers. A technician used to fixing B1092 on Jeeps might incorrectly assume a Ford needs a heated seat element, when the Ford code points to the DRLs. Always use a scanner to get the manufacturer-specific definition.

What do the numbers after the code mean, like B1092:14 or B1092 07?

These are manufacturer-specific subtype digits that provide a precise diagnosis. On a Ford, B1092:14 indicates a 'Circuit Short to Ground or Open'. On an Audi, the '07' indicates a 'Mechanical Failure', narrowing down the exact cause.

Can I fix a B1092 code myself?

It depends on the cause. Repairing an exposed wire is beginner-friendly, while replacing a Jeep heated seat element requires intermediate upholstery skills. Replacing an Audi HVAC motor is advanced due to dashboard disassembly and the need for a scan tool calibration.

Will clearing the code fix the problem?

No. Clearing the code only turns the warning light off temporarily. Because B1092 indicates a hardware or circuit fault, the code returns as soon as the control module runs its self-test again.

Why does my heated seat only fail when it's cold outside?

Cold temperatures cause the materials in the failing heating element to contract. This drops the circuit's overall resistance below the computer's 4-5 ohm threshold, triggering the fault. When the cabin warms up, the materials expand and temporarily restore the connection.

My scanner can't find code B1092, but the warning light is on. Why?

Basic code readers only access generic powertrain ('P') codes from the Engine Control Module. Body codes ('B') are stored in the Body Control Module (BCM) or HVAC module. You need an advanced scanner that communicates with these specific body modules.

My Audi's A/C seems to fix itself after restarting the car. Is it still the motor?

Yes, this is a common symptom for the B1092 mechanical failure. A power cycle temporarily frees the stuck recirculation flap motor. However, the internal stripped plastic gears mean the problem will inevitably return.

Key Takeaways

• B1092 is a manufacturer-specific body code, meaning it flags a heated seat failure in a Jeep but a pedestrian safety system fault in a Hyundai.
• The most common cause of B1092 is a broken heated seat element in 2011-2016 Jeep and Chrysler vehicles, which fails when resistance drops below the 4-5 ohm specification.
• You must use an advanced OBD-II scanner capable of reading Body Control Module (BCM) codes and 2-digit suffixes (like B1092:14) to diagnose this fault.
• Driving with B1092 is safe for comfort-related faults like HVAC or heated seats, but Hyundai owners must fix it immediately to restore the disabled Active Hood pedestrian safety system.