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rpmdiag
rpmdiag, Tech and Instructor
Category: Honda
Satisfied Customers: 6855
Experience:  Since 1975
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WE HAVE 2006 HONDA CIVIC WITH 1.8 COOLING FAN RUNS EVEN WITH

Customer Question

WE HAVE 2006 HONDA CIVIC WITH 1.8 COOLING FAN RUNS EVEN WITH ENGINE OFF AND KEY OUT. WHAT IS THE CAUSE
Submitted: 6 months ago.
Category: Honda
Expert:  rpmdiag replied 6 months ago.

Hi, I’m Ron and I can help you.
I have been in the auto repair business with my own shops since 1975 and also teach automotive repair. I am confident we can resolve your problem together. Please understand that I don't know your skill level. In most cases when you have a problem with the way the vehicle performs, specialized tooling is required to acquire computer data/information or engine testing results. We didn’t build these complicated vehicles; we just diagnose and fix them. Also understand that I can't see, smell, hear, or touch the vehicle either, so it may take a few replies to get to satisfactory results. I am also going to direct you with the fastest, easiest and most common things to check first. Please be patient and permit me to do what I do best.
I also try to give all of the information you may need, expecting a “positive rating” in return. I will also continue assisting you after you have rated me, if necessary. If there is any reason I cannot get a positive rating, please let me know why “in advance”, so I can go another direction for you. I am sorry you’re having this problem; I’ll help you through it.

A fan relay stuck closed will cause that as well as a computer staying grounded. You can test both with a scan tool using bidirectional mode.

Thanks, Ron