OBD Guide
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B3620

Head-Up Display Information Up Switch Circuit

B3620 is an OBD-II diagnostic trouble code meaning: Head-Up Display Information Up Switch Circuit. Common causes: open or shorted in the switch wiring harness, oxidation of switch contacts. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The head-up display does not operate regularly
  • Some information on the HUD stops being displayed
  • Spontaneous changes in displayed data without pressing a switch

Causes

  • Open or shorted in the switch wiring harness
  • Oxidation of switch contacts
  • Malfunction of the control switch itself
  • Problems with the HUD control unit
  • Damage to connection connectors
  • Software error in the control unit

How to Fix

  1. Carry out diagnostics with a scanner to clarify the nature of the malfunction
  2. Check the integrity of the wiring harness to the switch
  3. Inspect the switch contacts for oxidation
  4. Check the functionality of the switch itself
  5. If necessary, replace faulty components
  6. Clear error codes and check if the fault returns
  7. If you suspect a software error, flash the control unit

Related codes

B3610B3621B3622

Error B3620 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the B3620 code mean?

B3620 is an OBD-II diagnostic trouble code that indicates: Head-Up Display Information Up Switch Circuit

What causes a B3620 error code?

The most common causes of B3620 include: Open or shorted in the switch wiring harness; Oxidation of switch contacts; Malfunction of the control switch itself; Problems with the HUD control unit.

How do I fix a B3620 diagnostic trouble code?

To fix B3620: Carry out diagnostics with a scanner to clarify the nature of the malfunction. Check the integrity of the wiring harness to the switch. Inspect the switch contacts for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B3620?

Limited driving only, diagnose soon

How much does it cost to fix B3620?

The estimated repair cost for B3620 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat