Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B2828 — FM2 Radio Antenna No Connection State(Sub Ant)

B2828 — FM2 Radio Antenna No Connection State(Sub Ant)

Detailed page for trouble code B2828.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B2828

HYUNDAI B — Body

FM2 Radio Antenna No Connection State(Sub Ant)

Brand: HYUNDAI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken or disconnected antenna coax/connector
  • Corroded or bent antenna connector pins
  • Failed antenna amplifier or power feed
  • Blown fuse or loss of accessory power to the radio/antenna
  • Damaged wiring harness (open or short to ground/voltage)
  • Faulty AVN (head) unit or BCM/antenna control module

Symptoms

  • No FM2 stations or very poor FM reception on FM2 band
  • Intermittent reception or increased static/noise on FM2
  • Radio may show antenna or reception warning/message
  • One FM tuner works (FM1) but FM2 is dead or weak

What to check

  • Verify the DTC is current (not historic) and note conditions
  • Visual inspection of antenna mast/base, connectors and coax routing
  • Check fuses and accessory/ignition power to the radio and antenna amplifier
  • Wiggle-test antenna cable while monitoring reception/diagnostics
  • Scan for related audio/module communication codes

Signal parameters

  • Coax characteristic impedance: ~50 ohms (measure continuity/shorts)
  • Antenna amplifier supply: ~12 V (switched when radio ON)
  • Open circuit = very high resistance/OL between head unit and antenna
  • Short to ground = near 0 ohms between center conductor and chassis
  • RF signal level: absent or significantly lower than normal when fault active

Diagnostic algorithm

  1. Confirm and record the fault: scan modules, confirm B2828 is present and note freeze-frame conditions.
  2. Reproduce symptom: operate radio FM2 and listen for reception issue while observing live data/flags.
  3. Visually inspect the antenna base, mast, and connectors for corrosion, water damage, or loose fittings.
  4. Check fuses and verify 12V accessory power to the radio and to any inline antenna amplifier with a multimeter.
  5. Probe antenna connector at the head unit and at the antenna base: check continuity of center conductor and shield, and check for shorts to ground.
  6. Measure supply voltage to antenna amplifier (if applicable) while radio is ON; expected ~12V switched. If no supply, trace and repair power feed.
  7. If amplifier/power good but no RF continuity, test/replace coax or antenna assembly. If coax continuity and power present but no signal, bench-test or replace antenna amplifier or head unit input.
  8. After repair, clear codes and road-test to confirm FM2 reception restored and DTC does not return.

Likely causes

  • Loose or corroded connector at the roof/antenna base
  • Coax cable damaged by body work or previous repairs
  • Antenna amplifier not receiving 12V switched power
  • Water intrusion at antenna base causing open circuit
  • Internal failure of antenna motor/amplifier or head unit input

Fault status

⚠️ Status
FM2 (sub) antenna circuit: no connection detected — open/short or loss of antenna/amplifier supply; FM2 reception impaired.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2827 B2829 B2818 B2510
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B2828

LAND ROVER B — Body

Body Control Module (BCM) — Internal Fault

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken or disconnected antenna coax/connector
  • Corroded or bent antenna connector pins
  • Failed antenna amplifier or power feed
  • Blown fuse or loss of accessory power to the radio/antenna
  • Damaged wiring harness (open or short to ground/voltage)
  • Faulty AVN (head) unit or BCM/antenna control module

Symptoms

  • No FM2 stations or very poor FM reception on FM2 band
  • Intermittent reception or increased static/noise on FM2
  • Radio may show antenna or reception warning/message
  • One FM tuner works (FM1) but FM2 is dead or weak

What to check

  • Verify the DTC is current (not historic) and note conditions
  • Visual inspection of antenna mast/base, connectors and coax routing
  • Check fuses and accessory/ignition power to the radio and antenna amplifier
  • Wiggle-test antenna cable while monitoring reception/diagnostics
  • Scan for related audio/module communication codes

Signal parameters

  • Coax characteristic impedance: ~50 ohms (measure continuity/shorts)
  • Antenna amplifier supply: ~12 V (switched when radio ON)
  • Open circuit = very high resistance/OL between head unit and antenna
  • Short to ground = near 0 ohms between center conductor and chassis
  • RF signal level: absent or significantly lower than normal when fault active

Diagnostic algorithm

  1. Confirm and record the fault: scan modules, confirm B2828 is present and note freeze-frame conditions.
  2. Reproduce symptom: operate radio FM2 and listen for reception issue while observing live data/flags.
  3. Visually inspect the antenna base, mast, and connectors for corrosion, water damage, or loose fittings.
  4. Check fuses and verify 12V accessory power to the radio and to any inline antenna amplifier with a multimeter.
  5. Probe antenna connector at the head unit and at the antenna base: check continuity of center conductor and shield, and check for shorts to ground.
  6. Measure supply voltage to antenna amplifier (if applicable) while radio is ON; expected ~12V switched. If no supply, trace and repair power feed.
  7. If amplifier/power good but no RF continuity, test/replace coax or antenna assembly. If coax continuity and power present but no signal, bench-test or replace antenna amplifier or head unit input.
  8. After repair, clear codes and road-test to confirm FM2 reception restored and DTC does not return.

Likely causes

  • Loose or corroded connector at the roof/antenna base
  • Coax cable damaged by body work or previous repairs
  • Antenna amplifier not receiving 12V switched power
  • Water intrusion at antenna base causing open circuit
  • Internal failure of antenna motor/amplifier or head unit input

Fault status

⚠️ Status
FM2 (sub) antenna circuit: no connection detected — open/short or loss of antenna/amplifier supply; FM2 reception impaired.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2827 B2829 B2818 B2510
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .