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Loss of capacity in HV modules causes rapid SOC decline under load, reducing EV range. ASE L3 stresses recognizing end-of-life battery symptoms. Ignition, exhaust, or fuses are unrelated.

With ICE off, hybrids rely on an electric vacuum pump. If it fails, brake assist is lost in EV mode. ASE L3 stresses hybrid-specific brake support systems. ICE or exhaust issues don’t cause this.

The crankshaft position sensor provides timing data to the ECU. A faulty signal causes retarded ignition timing, resulting in sluggish acceleration. ASE L3 stresses sensor diagnostics in ICE subsystems. The other components listed are unrelated to ignition timing.

A leaking injector delivers extra fuel during restart, causing erratic idle and rich trims. ASE L3 emphasizes injector fault recognition during hybrid ICE transitions. Inverters, cabin filters, or fuses are not related.

Stop/start logic relies heavily on coolant temperature signals. A faulty sensor may falsely indicate conditions aren’t ready, delaying shutdown. ASE L3 highlights how ICE control is integrated with hybrid strategies. O2, brake, or knock sensors don’t directly control shutdown logic.