Independent technical knowledge for fluid diagnosticsLaboratory support by Chem-Tech Laboratories
Interactive diagnostic pathway

AdBlue Quality Concern

Interactive evidence pathway for an scr warning or questionable aus 32 source, with cautious outcomes and related testing.

Starting condition

an SCR warning or questionable AUS 32 source

Answer from verified evidence. If information is unavailable, choose the uncertain path rather than assuming.

Escalate when

  • Rapidly changing result
  • Multiple corroborating abnormal signals
  • Active leak, overheating, electrical or fire risk
  • OEM or site alarm exceeded
Evidence pathway
0%
Decision 1

Are urea concentration and refractive index outside the expected specification context?

Use comparable results and verify sample identity before choosing.