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Discussion Starter · #1 ·
I have a 2007 Tundra SR5 with 5.7 engine, 52,400 miles. Yes, I'm a geezer. Bought it new in 2007. I only use it when I need it for truck duties, not a daily driver. It's been trouble free since the differential was replaced under warranty at 13,000 miles. Yesterday I started it up and dash warning lights looked like a Christmas tree. The VSC light was flashing "off". Check Engine light was on. 4LO was flashing. I tried disconnecting the battery, left it off for several minutes before reconnecting. No change. Decided to see what was working as it should. Best I can tell, mechanically every function is working except it seems that rpms are higher than they usually are. Maybe the torque convertor isn't locking up. As understand it, the transmission only reaches the higher gearing by the the convertor lockup. Has anyone encountered this problem? Potential fixes, short of taking it to a dealership for a diagnosis? Thank you
 

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Discussion Starter · #4 ·
Thanks for your replies. I have no problem with the starter and the battery checks out fine. I'm praying it's not a problem with the Secondary Air Injection System. That seems to have been a common problem with early 5.7s. It looks like I need to invest in a code reader. That should help me determine if the problem is in that system. If it is , it's way beyond my skill set. Very costly to have it fixed.
 
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