Hallo LCKID / Hallo @ All
My LX 570 is New Zealand Specification!
Did you change the fuel pump and injection nozzles with the TRD supplied parts on your car? Without changing those parts the TRD Supercharger according to our experience will not work correct and you will get DTC's!
The DTC PO172 and PO175 are showing that there is an Air Fuel ratio problem and Unichip should be able to correct this! We have had this DTC's also at the beginning. We spend here in Thailand almost two weeks to resolve this issue. I cannot tell you how Unichip has corrected this Air Fuel ratio problem but for sure they have done it and the problem never came back!
Do you or any other of the readers have the Doug Thorley Headers long tube headers installed and does the DTC P2423 shows up?
I'm not sure that by unscrewing the rear O2 Sensors on the LX570 will be the solution to eliminate the problem with the DTC P2443, although on my Mercedes S500 on which we installed Kleemann Headers, Kleemann ask us to unscrew the rear O2 Sensors but without disconnecting the cable. Here I believe that Kleemann has altered the ECU beforehand with their ECU tuning. However, I suggested to Unichip to unscrew the O2 sensors on my LX570, but they told me that the O2 sensors have to be in place and we left the O2 sensors installed. By disconnecting the O2 sensors from the exhaust pipes without altering the ECU accordingly there must be an other DTC coming up, because the original signal from the O2 sensors back to the ECU will not be available since the O2 sensors are only "measuring air with the ambient temperature" which is by far below the exhaust temperature and without any pressure. I must admit that this issue is quite confusing to me.
I'm surprised that the Underdog Racing Rear O2 Simulator (see Picture below) is not working and does not eliminate the DTC P2443 after the installing the Rear O2 Simulator on my LX570.
Last week I have sent already an email to Underdog Racing Development on this issue but so far I have not received any reply!
Maybe some of the readers here have some experience with the DTC P2443 and do know how a short cut can eliminate the problem. Any advice would be appreciated and in advance thank you very much!
After all I have to say that Toyota TRD with their long time reluctance to provide the TRD Supercharger for the LC 200 / LX 570 has shown an unbelievable ignorance in respect to the wishes of their customers.
Picture of the URD Rear O2 Simulator, 3UR-FE 5.7/4.6L LEXUS V8 Dual Channel [O2 Sim Type I]
