Engine Performance (A8)第 103 / 120 题
A loose or missing fuel cap most commonly sets which type of code?
a.An EVAP system leak code (such as P0455 or P0457)
b.A misfire code
c.A coolant temperature code
d.An ABS code
解析
A poorly sealing fuel cap lets vapors escape and triggers an EVAP leak code, often the first thing to check for such faults. Tightening or replacing the cap and clearing the code frequently resolves it. Smoke testing finds larger leaks in the system.
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