Homunculus

I own a non-US (no OBD2) model 1998 LS400 that gets the occasional limp mode + check engine light.

Limp mode also gets triggered after pressing the gas pedal too far, then the throttle stops responding and it gets into limp mode until restart/battery disconnect

​​​​​​After shorting E1 and Tc on the diagnosis port in the engine bay I get the following code: EFI: E NG 19

Would anyone be kind enough to tell me what that means I searched all over without any luck

The car had a permanent limp before with the same pedal issue that was fixed for few months after replacing ECU capacitors

I'm not sure if its the same ecu issue or a new one

Thank you

Yamae

Sounds like a problem of the APPS. The quickest way to fix would be to replace it.
The part 22060-50010 for a 98 is discontinued and no longer available but 22060-50011 would be suggested to use by a dealer.

Homunculus

Thanks For the help always, I have just replace my APPS and the problem still occurs any ideas what it could be?

Yamae

Below is from a Celsior's manual and things are written in Japanese. See the right edge of the explanation.
(translation)
The TCCS code 19 is related to following 3 items.

・Wire harness or connector
・APPS
・ECU

When the APPS is not the cause, 2 others may be related.


VC, VPA, VPA2,E2 are all terminals of the APPS.
As far as I have experienced, all the TCCS code 19 failures were fixed replacing the APPS so far.

Homunculus

Problem was fixed, if anyone finds this same issue, turns out cable of the APPS connector was slightly cut, I cut and soldered the cable, added some shrink wrap and it was fixed.