2010 - Check Hybrid System (p07E8) Hesitates/Stalls when Accelerating

Thanks for the info guys. I plan to get to the EGR and its passages at some point.

BUT, now that I have confirmation with the p0102 and p0113 codes, I know I have a mass airflow issue. So, since I've already cleaned the MAF sensor and seen no improvement, I think I'll order a cheap one off ebay and see if that works.

If anyone knows any tips/videos/etc. on how to troubleshoot those codes, feel free to shoot them my way. The only ones I've found aren't Prius-specific and don't feel as clear as a NutzAboutBoltz video. Thanks!

 

I will add that I've tried the technique of unplugging the MAF sensor while the Prius is running. It makes a rough noise initially and then sounds basically normal to me. Idk. But I've ordered the cheap MAF sensor off ebay today.

 

TIme for an update. The ebay MAF sensor didn't work.

After a couple months, I now got another code: p0302 "Cylinder 2 Misfire Detected".

I went for the spark plugs. Their gaps seems a bit large, so I replaced them. I also swapped cylinders 2 and 3. No luck.

It then gave me these additional codes on top of the p0302: "p0300, p0301 Cylinder 1 Misfire Detected" and "Random/Multiple Cylinder Misfire"

So, I kept digging I saw somewhere it could be the MAP sensor. So I went into take a look and I'll upload the pics on the next post.

 

This is what the MAP sensor and location looks like. Definitely had oil (normal?), but no “resistor” or “doodad”.

In the more the distant future, I plan to tackle the EGR cleaning, but for now I’ve set up a diagnostics appointment with a hybrid mechanic for Thursday.

 

I should say it didn't fix the problem. It worked fine.

 

Are you saying the HV battery is causing the cylinder problems? I’d assumed they were separate.

 

Sorry, I'm just a shade tree mechanic at best. Your explanations are over my head.

I have a hybrid battery guy (who's now about 3 hours away). He told me it was fine to keep driving it as is until it gets worse. Maybe now is that time. So I've got an appointment with a separate hybrid mechanic in town.

I trust my hybrid battery guy because I've met him and the Prius battery is one of his specialties. I don't mean this in a rude way, what are your qualifications? I'm limited to just usernames on here and familiarity (I've seen Mendel be helpful on multiple threads). You could be the creator of the hybrid or just Joe Schmo for all I know. Hope this helps.

 

So this has happened to your Prius?

 

Didn’t get full diagnostics today because the mechanic confirmed @rjparker that the weakened battery will cause all sorts of problems for the Prius. And I’m now officially in the boat of repairing or replacing my battery STAT. The shakes have gotten worse and more common lately.

 

My battery guy said the opposite of the mechanic and I’m now so fatigued I’m prepared to give up and drive this thing off a cliff. I have no smart clue and it feels like I either pay the cost of a car to fix this car or I keep tinkering around, failing to figure out what it’s problem is. Thanks for all your help and good night.

 

Mostly good news! I finally cleaned the intake manifold based on the Nutz About Bolts videos. I'm in an apartment complex so I had to figure out how to turn my shower into a water hose with a jet nozzle. Soaked it in purple power and sprayed it good.

In the following 14 days (that included a 2 hour trip to Nashville and back), I've had zero misfires.

The old minor symptoms still seem to be there (little hesitations, etc.) and the battery light still likes to come on. But the car gets great gas mileage and the battery shuts off at stoplights every other time, so I'll call it a victory.