hey CL my sc300 is throwing a code 78 and the fuel pump is not running but some times runs when it wants to.

 

any advice could use it now?

 

Lexus Diagnostic Connector TE1 and TE Terminals

Code 12 and 13 Rpm signal circuit fault

Code 14 Igniter signal circuit fault

Code 16 ECT control signal fault

Code 21 and Code 28 Main oxygen sensor fault (for ES300; SC300 GS300 models)

Code 22 Coolant temperature circuit fault

Code 24 Intake temperature sensor circuit fault

Code 25 and Code 26 Air fuel ratio fault (for ES300 SC300 models)

Code 27 Sub-oxygen sensor circuit fault (for ES300 CA GS300 models)

Code 31 Low airflow meter voltage (for ES300 and GS300 models)

Code 32 High airflow meter voltage (for ES300 model)

Code 35 Barometric pressure sensor circuit fault (for GS300 SC300 models)

Code 41 and Code 47 Throttle position sensor circuit fault

Code 42 Vehicle speed sensor circuit fault

Code 43 Starter signal

Code 51 Switch condition signal fault (for ES300; GS300 SC300 models)

Code 52 Code 52 and Code 55 Knock sensor circuit fault

Code 71 EGR system circuit fault (for ES300; GS300 SC300 models)

Code 78 Fuel pump control circuit fault (for GS300 SC300 models)

 

Follow directions in thread below:

https://www.clublexus.com/forums/per...tures-faq.html

IF that does not solve the problem or you have already done the 12v mod, could be an issue with the ecu internally.

 

Bad Fuel Line?

 

a better picture

 

Whats the best solution ?

 

??? Anybody