Ibone23 LVC Member Joined May 15, 2020 Messages 18 Reaction score 1 Location Los Angeles May 15, 2020 #1 I have 98 Mark viii my check engine light just came on reads p1506 (IAC) valve duty cycle higher than expected any one now what this issue could be???
I have 98 Mark viii my check engine light just came on reads p1506 (IAC) valve duty cycle higher than expected any one now what this issue could be???