2011 Corolla bog down momentarily,

[Sharky1100]

the wife just bought a 2011 corolla, it seems to bog, rpm’s drop, intermittently at speeds from 40 to 60. Indy shop replaced maf sensor, did not solve the problem.Has anyone here heard of such a thing? Does it with cruise control on and also when off. No check engine light on.

[Bper]

Hi Mark,Yes, there have been reports of 2011 Corollas experiencing bogging and RPM drops at varying speeds, even without a check engine light.Throttle Body Cleaning, a dirty throttle body can cause erratic idle and airflow issues, leading to bogging and RPM fluctuations. Cleaning the throttle body is a relatively inexpensive fix and might be worth trying. You can find DIY guides online or take it to a mechanic.

Idle Air Control Valve (IAC),the IAC valve regulates engine idle speed. A malfunctioning IAC valve could be causing the RPM dips, especially when coming to a stop.Other Sensors,the Mass Airflow (MAF) sensor was replaced, but other sensors like the crankshaft position sensor or oxygen sensor issues could also contribute to these problems.A mechanic can diagnose which sensor might be failing. In some cases, a software update for the Engine Control Unit (ECU) might resolve the issue.While the car may be drivable,a bogging engine can be dangerous, especially when merging or overtaking. It's safer to have a mechanic diagnose and fix the issue as soon as possible.Hope this helps.