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Same here. 2015 REX. I ended up draining all gasoline and it runs like BEV now.

I disconnected the connector to the throttle body and tried to start the engine. And it started and kept running without stopping this time. The AFR went down to around 1 instead of 1.99. It sounds a little rough but not too bad, expected. When I manually close the throttle a little it...

Injection pattern does not look great, I will try to clean first and possibly replace them.

This would be super useful to fix REX problems.

I just tested the after cat oxygen sensor using ISTA, RDME diagnosis page. It always reads 1.28V. It is a four wire sensor so it is probably not wideband, so it may need to completely heat up before reading anything good. It would be really nice to have a good working RDME test values on this...

Hi spartacus68- That number is for after cat oxygen sensor. I did not check that one yet. Do you think your problem was solved with this sensor in the end?

I just did the compression test, they are 241 and 242 PSI. Also, I attached injection test bulbs on the outputs, it only lights up for 2 seconds and quits while the engine is still cranking. It seems to just not like something before engine has a chance to start up.

I just changed the crankshaft sensor and it still has the same codes. :(

I thought I should share my experience with this problem so far. I got the drivetrain error message come up on the highway, did not get any other warnings before. I am following the ISTA test plan for the error. Here is what I have done so far. 1- Replaced Fuel Pump Relay 2- Spark Plugs 3-...