resetting the diagnostic codes

I recently have had my check engine light going on & off. When I last went to get it checked out they didn't do a reset (I don't believe). They weren't sure of the cause (basically throwing darts at it) and it's come on & off again twice since. I would like to clear the codes since I want to go to a different shop & get another reading. What fuse do I need to pull (I've checked the owner's manual, it isn't clear) or what is another easy way to do it?

2008 Touring model, 102K miles.

Thanks all!

 

OK thanks. I do have a record of the codes that were read by the shop I went to. Yes that P1121 was one of them ( they thought it was due to low coolant level, which was the case apparently - claim they could feel coolant flowing but couldn't determine if all 3 valve chambers were functioning properly. My BF, who used to work as a mechanic some time ago, says it's BS that you can't feel coolant flowing like that but he's used to the old days hasn't worked on more recent model cars so idk.) They also replaced the water pump since it was "seeping" (it was replaced 4 yrs ago by previous owner I know they're well known for going out but is this normal wear?) Hoping not the catalytic converter. Going to be taking to a shop that knows Prii better.

 

Yeah that's really unfortunate. I only just started going to this shop ... they have a great reputation, they may be fine for a standard car but clearly know very little about Prii so I won't be returning. Interesting that they should have automatically replaced the valve when they did the water pump. Not sure it's worth my taking this issue up with them, chalk it up to live & learn I suppose.

Is only getting 4yrs use out of a water pump normal for Gen II? Also they didn't drain & fill coolant they just topped it off. Mistake?

 

Yup, they're clearly pretty clueless. This error code (& problem with valve) must be pretty common for you to have guessed it without my describing symptoms (other than light going on & off), unless you saw thread concerning my related post several days ago

 

Sure enough. Yesterday took it to a different shop (new one for me), I knew I was in good hands when I drove up & their parking lot was full of Prii including several taxis. I described the symptoms - check engine light on/off and the noise, told him the diagnostic code and he said ok, we'll replace that valve for you. $315 before tax, I've seen folks say it cost them more so I guess it could be worse. No more mystery noise. And I've found a good shop (just wish they were more convenient, 30 min drive from me & can't get there via transportation to/from work, at least they're open on Saturdays)

 

Sure enough @JC91006 . Found a good Prius place. Ended up going to Saggu Automotive Repair last Saturday. Knew I was in good hands when I drove up & saw more than half the cars there were Prii, with several taxis. When I described the CEL & the noise, the mechanic checking me in said almost 100% certain both caused by the 3-way valve. 2.5 hours (and $341, including our crazy 10% tax) later, done. I think I may even return for oil changes since they really seem to know their stuff.