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Last year my 2006 GX470 threw the P2445 code with about 180k miles on the clock. I installed the Rutech bypass system including block off plates and everything seemed normal. However, I park outside and on cold mornings when I commute to work my GX will go into limp mode and light up the typical warning lights, but not at startup. I understood that the computer only checked for the SAIS at the time of a cold startup. I have about a 24 mile highway commute and the warning lights will come on about 15 miles into the trip but only on cold mornings. I pull over and check the code and it's always P2445. I clear the code and the vehicle will be fine for the rest of the day and do the same thing the following day. This situation only happens when it's cold out and I have no issues throughout the spring and summer. Has anyone ever heard of this or know of a solution?
I searched the forums and haven't found the solution to this issue but I might be bad at searching.
Yes, they were very helpful.They sent a replacement unit and offered a refund. They tested the old unit and it tested good on their end. I have the same issue with the replacement unit so I don't think it's the bypass kit.
I thought if the SAIP pump valve failed open it has to be replaced or tricked to think it's closed with resistors or it will keep logging that fault. That's why it's important to install a bypass BEFORE they fail as preventative maintenance.
I thought if the SAIP pump valve failed open it has to be replaced or tricked to think it's closed with resistors or it will keep logging that fault. That's why it's important to install a bypass BEFORE they fail as preventative maintenance.
I believe if the valve failed in the open position, the bypass will still work so long as the block off plates are installed (the plates serve the purpose of a closed valve)
I believe if the valve failed in the open position, the bypass will still work so long as the block off plates are installed (the plates serve the purpose of a closed valve)
Ah that's right. Maybe a leak in the pipes or gaskets at the blockoff plates? I know mine were sketchy to get in there.
Ah that's right. Maybe a leak in the pipes or gaskets at the blockoff plates? I know mine were sketchy to get in there.
So far so good in the cold weather with my Hewitt-Tech bypass. Has been in the teens the past few mornings. My codes had suggested the valves failed in open position and I also installed the exhaust block off plates.
I believe if the valve failed in the open position, the bypass will still work so long as the block off plates are installed (the plates serve the purpose of a closed valve)
I installed the block off plates when I hooked up the unit. One thing that I have found that is working for me is if I start up in the cold morning and let it run a few seconds before turning it off and restarting. If I do a restart I have no issues 15 miles into my drive. It's not weird if it works right?
Does your kit have the wire tied into the starter relay? I think some of the kits have difficulty if you have the ignition 'on' but don't start the truck immediately, though I'm not sure why you'd be seeing problems after 15 miles.
Does your kit have the wire tied into the starter relay? I think some of the kits have difficulty if you have the ignition 'on' but don't start the truck immediately, though I'm not sure why you'd be seeing problems after 15 miles.
The kit just has the plug and the block off plates. I'll add a pic. I'm assuming at this point it's an issue I may need to go to the dealer to fix, which is always a last resort.
The kit just has the plug and the block off plates. I'll add a pic. I'm assuming at this point it's an issue I may need to go to the dealer to fix, which is always a last resort.
The bypass module is activated when the ignition is first switched to "ON" and any time it detects a 4-12V signal on the starter relay wire. The starter relay option is only available on the Hewitt-Tech SAIS Bypass Modules! This option, when connected, ensures that the module actively prevents the SAIS from running on EVERY start. With the starter relay wire connected you can turn the ignition to "ON" for any period of time and the module will be active as soon as you crank the engine. Without the starter relay wire connection you would need to turn the ignition back "Off" and then crank the vehicle to ensure the module is active or the system could operate and cause trouble codes and the CEL to come back on. Just install the kit with the starter relay wire connection and don't worry about having to start the engine as soon as you turn the key on! If anyone else drives the vehicle this is a Must!
Dash lit up yesterday with P1445. Will this Bypass let you pass emissions testing when time comes? Thanks
What year is your GX? The bypass kit eliminates the secondary air system from the picture, so as long as you don't have other OBDII faults it should pass.
What year is your GX? The bypass kit eliminates the secondary air system from the picture, so as long as you don't have other OBDII faults it should pass.
11-08-18, 07:27 AM
SAIS Bypass Installed but I still throw codes
