Hey, can someone help diagnose this problem? Got a CEL today (1/2 throttle in 4th gear) and imediately went into limp mode. The car would barely maintain 65mph, so I had the codes pulled... there were actually three tripped:

P0113 – IAT SENSOR HIGH INPUT
P0223 – TPS PEDAL POS SENSOR HIGH INPUT
P1234 – MANUFACTURERS CONTROL FUEL AIR METERING

I'm going to head back to my tuner, but don't think I can make it there for a while. Can someone tell me which of these is causing me to go into limp mode, and if I should be concerned with driving it? (It came out of limp after I parked it for an hour). Should I just turn down the mbc for now?

Setup:
FP Red
AMS mbc
800cc
FMIC
ULICPs
UR O2 DP
high flow cat
catback
93oct
~24psi

Thanks,
Ryan

 

When you were at half throttle, how much boost was the car pushing?

 

With an EVO you should get a code reader that way you can clear it when it happens. Its the best way to get it to your tuner and there only like 50 bucks big help.

 

Thanks for the tips. not sure exactly what boost level it happens at, so i need to watch that. I'll consider a code reader too.

 

do you have a VTA BOV?
was the boost higher than 22 psi?

i faced it with 3 different evos before and the reason was the BOV (HKS SSV).
removed and kept the boost around 24 psi max. no problem.

 

its something with ur bov, ive seen this before

 

I would turn down the boost. You don't have to turn the car off for an hour to have the power come back. You only need to turn it off for a minute. You also cannot clear the code until you have at least cycled the power to the ECU once. You have to wait for the code to turn into a logged code instead of an active code. The ECU power cycle will do this.

Personally, I would get rid of the MBC and go with an ECU based BC. You don't have to use the stock solenoids, unless you want to. A 3 port solenoid works well too.