I cleaned the MAF sensor in accordance with the instructions here. The code then goes away for about 5 months. It goes away long enough for me to believe that the MAF sensor is at fault or needs cleaning but I am not entirely sure. I have even replaced the MAF sensor. I would like to know what this is without going down too many difficult rabbit holes if at all possible. One thought is that I am using a cheap air filter that is non-Toyota and I live off of a dirt road. Maybe the filter allows more in than the OEM? 95% of my driving is not on this dirt road so I am not 100% sure about that. Any ideas? Thanks.
What scantool are you using? What brand of MAF sensor did you install? Here's a list of "known good" MAF readings for my 2006 under different operating conditions. How does your car compare? What are Short Term and Long Term Fuel Trim values? - at "hot idle" - (1000RPM), at 2000RPM, at steady 45mph cruise, and at faster speeds. What does the upstream Air/Fuel sensor voltage show at same conditions? Posted via the PriusChat mobile app.
Wow, never saw this. I will go ahead and clean the TB then. I replaced it with an OEM MAF (Denso) I believe. Putting back the old MAF results in the same scenario so I know it is not that. I do not have a scan tool for this purpose. Honestly with 5 other different branded vehicles the need to buy new scan tools does add up. I appreciate the info and when I am positioned to purchase a scan tool or perhaps use existing hardware or software laying around I will check into it further since the freaking light just popped up again. Thanks!
Some ECM (engine) data is covered by generic OBD2 protocols. Stuff like RPM, MAF, ECT, fuel trims, etc are pretty much "the same" for most any 1996 & newer car sold in the US. So if you already have some type of scantool, it should have OBD2 capability and be able to give you some engine data. Posted via the PriusChat mobile app.
Agreed. It's very likely that one of the tools you already own can read the basics out of a Toyota, and fortunately you only need basic fuel injection info to solve this one. You probably don't need to spend money until this car shows a hybrid-related code
Thanks. I cleaned the throttle body but that didn't fix it. I am also noticing an audible exhaust misfire now. I am not sure if it is related. I will try additional scan tools but don't want to go down any rabbit holes. Ideas on next steps please along with scan tools to use? Thanks.
