P0401 Check Engine Code/ Burning Oil

Is the oil consumption problem gone after the egr clean up?

 

Have your oil consumption of vehicle stopped after egr cleanup?

 

Oil consumption on 3rd Gen is mainly due to the piston and rings. Toyota used low-tension piston rings; they have less outward springiness, so less friction, gets Toyota a slightly higher mpg rating for the car, and an oil consumption headache down the road, for their customers. They finally revised the rings, and pistons, partway through model year 2014, cold comfort for owners of the earlier years.

There’s not unreasonable speculation that oil consumption will mean more carbon particulate in the exhaust, and accordingly the EGR will clog up with carbon, even faster than it does with no oil consumption.

All that considered, cleaning the EGR system does not stop oil consumption. The fix for oil consumption is a complete engine tear-down, replacing piston and rings, or just swapping in a new short block.

Cleaning the EGR system is worthwhile though. Toyota implemented an inadequate and insufficiently tested new system with Gen 3 (model year 2010~2015). Again, it likely got them a slightly higher mpg rating. It’s prone to clog, engine runs hotter, head gasket fails.

what’s the miles on yours, what’s your oil consumption rate (say miles per quart consumption), has the EGR system ever been cleaned, and if so when?

 

I’ve just cleaned it now and put some new oil. I’ll let you know in some days. I don’t have any codes flashing on dash but when I attached my code reader it still shows the p0401 and I got a new one now p0102

 

Is it better to sell the vehicle now? It’s 205500 miles.