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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE CHART

DTC No. Detection Item Trouble Area
B1244 Light Sensor Circuit Malfunction
  1. Automatic light control sensor
  2. Wire harness or connector
  3. Main body ECU RH (Cowl side J/B RH)
B2412 Headlight Swivel Motor LH Malfunction
  1. Headlight swivel motor LH

    (Headlight assembly LH)

  2. Wire harness or connector
  3. AFS ECU
B2413 Headlight Swivel Motor RH Malfunction
  1. Headlight swivel motor RH

    (Headlight assembly RH)

  2. Wire harness or connector
  3. AFS ECU
B2414 Steering Position Sensor Malfunction
  1. Steering angle sensor
  2. Wire harness or connector
  3. AFS ECU
B2415 Vehicle Speed Sensor Malfunction
  1. Skid control ECU with actuator (w/o VDIM)
  2. Skid control ECU (w/o VDIM)
  3. Wire harness or connector
  4. AFS ECU
B2416 Height Control Sensor Malfunction
  1. Height control sensor
  2. Wire harness or connector
  3. AFS ECU
B2417 Headlight Beam Level Control Motor LH Malfunction
  1. Headlight leveling motor LH

    (Headlight assembly LH)

  2. Wire harness or connector
  3. AFS ECU
B2418 Headlight Beam Level Control Motor RH Malfunction
  1. Headlight leveling motor RH

    (Headlight assembly RH)

  2. Wire harness or connector
  3. AFS ECU
B2419 BEAN Communication Malfunction
  1. Multiplex communication system
  2. Wire harness or connector
  3. AFS ECU
B2420 AFS ECU Malfunction AFS ECU
B2428 Vehicle Speed Signal Malfunction
  1. Brake control system
  2. AFS ECU