C1306

Code

HYUNDAI C — Chassis

Internal vehicle RF source e.g. scanner

Brand: HYUNDAI

Type: C — Chassis

Views: UK: 12 EN: 16 RU: 9

AI status

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Page language: EN

Aftermarket RF devices (radar detector, scanner, Wi‑Fi hotspot, poorly installed remote start)
Faulty or loose wiring/ground acting as an antenna
Damaged or unshielded coaxial/antenna cables
Malfunctioning internal module emitting unintended RF noise
Nearby portable radio equipment used inside vehicle (two‑way radios, scanners, powerful mobile amplifiers)
Poorly seated connectors or corrosion at RF/antenna connections

Warning lamp or message related to wireless system (e.g., TPMS, keyless entry, telematics)
Intermittent or lost communication with wireless sensors or remote fobs
Reduced range or unreliable operation of keyless entry/remote start/TPMS
DTC sets when accessory is active or when certain equipment is used

Read and record freeze frame and all stored codes with a scan tool; note conditions when code set
Ask customer about recently added aftermarket electronics (scanners, detectors, remote starters, Wi‑Fi hotspots)
Visually inspect antenna, coaxial cables, connectors and ground straps for damage or corrosion
Operate vehicle in different locations to rule out external RF sources
Temporarily remove or disable suspected aftermarket devices and re-scan for code
Use scan tool/OBD data to monitor affected wireless system behavior while reproducing the issue

Typical vehicle RF systems operate in bands around 315 MHz or 433 MHz (region dependent) for TPMS/keyless; there should be no strong broadband spikes outside expected packet bursts
Expected wireless sensor packets: short bursts with distinct duty cycles rather than continuous carrier
Noise condition: elevated broadband noise floor or continuous carrier that overlaps sensor frequencies
Voltage supply to RF module stable (no high ripple) and module ground resistance low (

Interview customer and document any aftermarket RF equipment or recent service. 2) Clear code and attempt to reproduce; note conditions. 3) Disable/remove aftermarket devices and recheck for code. 4) Inspect antenna/coax and module connectors for damage, corrosion, or loose mounts; repair as needed. 5) Check module and antenna grounds; clean and tighten ground connections. 6) If available, use a handheld RF detector or spectrum analyzer to locate strong internal sources while systems are operating. 7) Isolate circuits: disconnect accessory power feeds one at a time (radio, amplifier, aftermarket modules) to see if interference stops. 8) If interference persists after removing external devices, swap or bench‑test the suspected control/telemetry module with a known good unit per service manual. 9) After repairs, clear DTCs and perform road/test range checks to confirm normal wireless operation. 10) If diagnosis remains inconclusive, consult manufacturer technical service bulletins for known RF issues or module software updates before module replacement.

Aftermarket accessory (radar detector, scanner, alarm/remote start) transmitting on same band as vehicle sensors
Damaged shield or loss of ground in antenna/coax harness
Loose connector at antenna or RF module
Faulty body control/telematics module producing spurious emissions

⚠️ Status

Internal vehicle RF source detected (example: scanner or other transmitter) — interference may degrade wireless sensor or remote communications.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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