Would appreciate any thoughts about the above codes on a 2008 Lexus GX. The codes P0172, P0175 and P0101 have been set for a while. There was a time a couple of months ago when it intermittently ran badly, almost like limp mode. But, that didn't happen much. For the most part, it seems to run fine. I put a new MAF sensor on it, and tried to look for vac leaks. Lots of lights on - VSC Trac, VSC Off, antiskid, check engine.
One thing to note - the SAIS pump went bad about a year ago, and I put the Hewitt Tech bypass on. The SAIS related codes went off and it ran fine with no codes for about 6 months before the current issues started.
Checked the codes again today. Had P0172, P0175 and P0101 as usual. Now it also has P0172 and P0175, pending, and it has set P0116 (coolant temp sensor). Wondering if P0116 may be unrelated.
Any thoughts on the most likely direction to look?
One thing to note - the SAIS pump went bad about a year ago, and I put the Hewitt Tech bypass on. The SAIS related codes went off and it ran fine with no codes for about 6 months before the current issues started.
Checked the codes again today. Had P0172, P0175 and P0101 as usual. Now it also has P0172 and P0175, pending, and it has set P0116 (coolant temp sensor). Wondering if P0116 may be unrelated.
Any thoughts on the most likely direction to look?
