"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. During diagnosis, refer to the functional description (FUB), Troubleshooting Malfunction Indicator Lamp I01. This document explains the rationale behind what triggers an MIL on an electrified vehicle, as well as some diagnostic hints. If these diagnostics do not lead to a root cause and a solution, continue with the following: ? Do not clear faults with ISTA/D. ? Use the recommended ACTRON OBD scan tool to read out any code (P or U code) that is present. The ACTRON scan tool was sent to BMW centers via the automatic tool shipment program. For more information on this tool, refer to SI B04 18 15. ? Record any and all P/U codes. ? Look up the relevant code[s] in the attached document, SAE_P-Code_List.pdf. This list provides the description for BMW specific P/U codes. ? Match the P/U code[s] to the fault codes stored in the vehicle. Typically the P/U code description is very close to the fault code title. - NOTE: Even though multiple OBD-relevant fault codes may be stored in the vehicle, the P/U code displayed is what triggered the MIL. Therefore, continue diagnostics for the fault code associated with the P/U code displayed. ? If no P/U codes are displayed and ISTA/D diagnostics are inconclusive, submit a TC PuMA case entitled Check Engine Light - No Relevant Faults to either ""BMW i3 Powertrain Components"" or ""i8 Powertrain Components"" for further assistance. -The P code and diagnosis summary should be included in the case."
