Hyundai B1346 Code Meaning
The airbag computer measured too much resistance in the driver airbag circuit; it may not deploy in a crash.
Safety first · Consult a professional
- Airbag (SRS) circuits must only be serviced by a professional. Never probe airbag connectors — accidental deployment causes serious injury.
At a glance
Severity: High
- Meaning
- Driver Airbag Circuit Resistance Too High (Stage 1)
- System
- Body Systems · Body
- Safe to drive?
- With caution
- Typical repair cost
- $100–$1,300
- DIY difficulty
- Professional only
Every time you switch on the ignition, Hyundai's airbag control module sends a tiny test current through the driver airbag's firing circuit, which runs from the module under the center console, through the clock spring behind the steering wheel and into the airbag's first-stage igniter. A healthy loop reads only a few ohms; B1346 is set when the reading rises well above that range, which means a poor contact or a damaged conductor somewhere along the path. On models with a dual-stage driver airbag this code covers the first stage. The overwhelmingly common culprit is a worn clock spring ribbon, and Hyundai has recalled clock springs on some models, including certain 2007–2008 Santa Fe and Veracruz vehicles, for exactly this high-resistance condition.
Can I keep driving? The car drives normally, but treat the driver airbag as disabled until it's repaired. Get it fixed promptly and don't let anyone probe or unplug airbag parts with the battery connected.
How to read B1346
- B Body
- 1 Manufacturer-specific
- 3 Body Systems
- 46 Specific fault
Symptoms
- Airbag (SRS) warning light stays on after the startup check
- Horn doesn't work or works only with the wheel turned a certain way
- Steering wheel audio, cruise or phone buttons dead or intermittent
- Heated steering wheel stopped working on equipped models
- Light comes and goes while turning the wheel, often logged as a history code
Possible causes
Ranked by how often each cause is behind this code (editorial estimate).
- Worn or torn clock spring (spiral cable) ribbon behind the steering wheel
- Clock spring damaged after steering wheel or column work because it wasn't centered
- Loose or corroded connector at the airbag module or at the clock spring
- Faulty driver airbag module (igniter circuit inside)
- Harness between clock spring and airbag control module damaged
- Airbag control module internal fault
Diagnosis step by step
Run the VIN for recalls
Check your VIN on Hyundai's owner site and at NHTSA. Several Hyundai clock spring campaigns exist, and an open one means the repair is free at the dealer.
Note the other symptoms
A dead horn or dead wheel buttons together with B1346 almost always means the clock spring, because all these circuits share its ribbon cable. If the horn and buttons work, the airbag module and connectors move up the list.
Read and record SRS codes
Use a scan tool that reads the airbag module and note whether B1346 is current or history. A history code that returns only while steering points strongly at the clock spring.
Tools: OBD-II scanner
Isolate with an airbag simulator (technician)
With the battery disconnected and the capacitor discharge time observed, the tech swaps the driver airbag for a resistor simulator at the clock spring plug. If the code clears, the airbag is at fault; if it stays, the clock spring or harness is.
Tools: OBD-II scanner
Replace and center the clock spring
A new clock spring must be installed with the wheels straight and the spring at its center position; an off-center unit tears on the first full-lock turn. Clear the codes and confirm the SRS light goes out after the bulb check.
Tools: Torque wrench
Repair options & costs
| Repair | DIY? | Estimated cost |
|---|---|---|
| SRS diagnosis | No | $100–$180 |
| Clock spring replacement (free if under recall) | No | $250–$600 |
| Airbag or clock spring connector repair | No | $120–$300 |
| Driver airbag module replacement | No | $500–$1,200 |
| Airbag control module replacement | No | $600–$1,300 |
Rough US estimates for parts and labor; shop rates vary by region. Not a quote.
Notes by brand
Kia
Kia shares the clock spring design on several platforms and has run its own clock spring campaigns, for example on some Sorento models. The same code and the same VIN check apply.
Emissions / smog test impact
Depends
B1346 has no effect on the emissions part of a state test, but states with a safety inspection may fail a car with the airbag light on.
Frequently asked questions
Why did my horn stop working at the same time?
The horn, steering wheel buttons and the driver airbag all pass through the clock spring's ribbon cable. When that ribbon cracks, they tend to fail together, which is the clearest sign the clock spring is the problem.
Can I replace the clock spring myself?
It means removing the driver airbag, an explosive device, and centering the new spring precisely. Mistakes can fire the airbag or leave the system disabled, so this is a job for a trained technician.
Is a used clock spring from a junkyard OK?
It's a gamble because you're buying a part with the same wear as the one that failed. For a safety system, a new part is the sensible choice, and it may be free under a recall.
Will the code clear by itself after the repair?
Current codes usually clear once the circuit is good, but history codes must be erased with a scan tool. If the light stays on after the bulb check, the repair isn't complete.
Sources
- Manufacturer public service information (cross-checked)
- NHTSA Recalls API
- Methodology: How We Build Code Pages · Data Sources We Use · Editorial Policy