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SolaraGuy.com • View topic - Couple Questions - Code 125 & Supercharger Question
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Couple Questions - Code 125 & Supercharger Question

PostPosted: Wed Apr 11, 2012 3:09 pm
by justdefiant
Hey guys how's it going. Just got a couple of questions. I have a 99 Solara with TRD supercharger running 4 psi of boost.

1. I just installed a new set of headers w/downpipe, mostly because my manifolds were leaking. After install, I got rid of code 440, but after driving a few minutes I developed code 125 - insufficient coolant temperature for closed loop operation. When installing the headers, we had to extend the wiring harness that goes to the O2 sensor due to hole being drilled in the wrong location. (Bought cheap headers off ebay from tuningpros) Would this be causing this? Is there anything I can do about it?

2. Also, something I've noticed is that when driving If I mat the pedal from a stop, the boost will jump up to 4 psi but then when the transmission goes to shift in to second I lose all my boost for a second while it shifts, then it spikes back up to 4 psi when it completes the shift. I thought it was belt slippage maybe, so I installed a brand new belt but this persists. I am asking if this is normal, and if not how can I fix it?

Re: Couple Questions - Code 125 & Supercharger Question

PostPosted: Thu Apr 12, 2012 8:06 am
by ToyoSolV6
for ur first question what kind of headers did you buy?

second question, your belt is not slipping from a dead stop you floor of course your going to reach your max boost which in this case im assuming your only 4psi. Our set up=instant boost. Now your concerned that while you shift between gears you stop boosting and as soon as your back in gear and floor it your boost goes up again. Thats normal theres no way your going to hold boost between shifts unless you power shift (floor the gas while your clutching) and i wouldnt recomend you doing that...ever!

Re: Couple Questions - Code 125 & Supercharger Question

PostPosted: Thu Apr 12, 2012 9:40 am
by 1gSE
I'm willing to bet its an auto with an EBC. But if so, it shouldn't be in boost at all in 1st right?

http://www.obd-codes.com/p0125

Re: Couple Questions - Code 125 & Supercharger Question

PostPosted: Fri Apr 13, 2012 7:32 am
by Gregtrd
If it has a ebc, boost should kick in at about 30mph thats if youre
flooring it, and cut boost between shifts .

Re: Couple Questions - Code 125 & Supercharger Question

PostPosted: Sun Apr 15, 2012 7:38 am
by justdefiant
http://www.ebay.com/itm/110832981488?ss ... 1497.l2649

Those are the headers I bought. Is this anything I can do about the check engine code?

Also the car is an auto, not sure about ebc, boost gauge reads 3-4 psi while matting it in first.