Home >> BMW >> 2012 >> 535xi >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - N55 - Diagnostic Trouble Codes - DTC P1638 (BMW DTC 100001) Through DTC P10EB (BMW DTC 10BA41) >> DTC P1628; BMW DTC 107A91: Throttle-valve actuator, opening spring check: error during spring check >> Fault code