Service Engine Soon (MIL) Lamp Illuminated with No Relevant Faults. INFORMATION If an i3 or i8 is brought in for service with a Service Engine Soon (MIL) lamp illuminated, or with a customer concern that the MIL is intermittently illuminated, troubleshoot with ISTA/D. If these diagnostics do not lead to a root cause and a solution, do the following: Do not clear faults with ISTA/D. Use an aftermarket OBD scan tool to read out any P-codes that are present. Record any and all P-codes. Submit a TC PuMA case entitled Check Engine Light - No Relevant Faults to either "BMW i3 Powertrain Components" or "i8 Powertrain Components." The P-code and diagnosis summary should also be included.
