Recently my H3 threw a power reduction alarm and later thru some online research I found out it was related to the throttle body. i went to my local junk yard and purchased a used unit, this unit worked for a week or so then it went bad. My H3 would not crank at all, battery was good just wouldnt turn at all, I went ahead and reinstall the old unit and it started right away, but still throws power reduction alarm. My question is: do I have to recalibrate the new throttle body at all or that is not neccessary?
please advise anyone.

 

Throttle Bodies are plug and play, no programming.

A throttle Body has absolutely nothing to do with whether a battery can turn over the engine when the start switch is activated. The TB is on one of many possible causes for reduced power or limp mode condition.

Are you still running the crappy azzed OEM Battery Terminal Connectors? #1 item to replace on every H3.

 

It is virtually implausible to expect a group of folks on a web forum to be able to guide you to a correct solution without all of the facts and stats. Even then it's a crap shoot lol.

 

I've a 2007 h3 that sometimes(3 or 4 times a week) wont crank/wont start and when it does start, engine power reduce error pops out. I've gone thru several you tube videos related to this issue, but non are conclusive. I've also replaced the throttle body twice, but issue continues. Any suggestions anyone?

 

Have you searched PassLock? You could have a bad ignition switch as well.