I was driving to boston market and went over one of their new speedbumps. Comming off the speedbump my dowpipe came down and bumped it, but not too hard. Immediately after, my check engine light came on. I checked the codes and i have a 20 and 41, a "electronic load detector," and, "primary oxygen sensor." I'm running my 00 Si OBDI w/hondata, and its a P28 ECU. everything was fine before this happened. My volts are also below where they used to be, at about 11.0A. Its a 2 month old altenator too. My speedometer doesn't work now too? Is the speedo from the load detector? And my idle bounces up and down around 1000rpms which is new now too. I don't know what the hell happened. Screw boston market. Anybody got any ideas why all this stuff happened at the same time? Oh yeah, even my filter from the greddy kit fell off too....? Random things man, random. Thanks for any help.

 

Sounds like you had some wires come loose. Check them ALL.

 

Usually the ELD, O2 heater and VSS share the same fuse - check that too.

 

Thanks dudes. I ended up checking the fuses and I found that the altenator sp sensor (whatever sp mean) fuse was fubar'ed. So I swapped it out with a spare 7.5A fuse and the car ran perfect. Wierd how that happened over a speedbump... it was probably just coincidence? Thanks for the help guys!