OBD1 CHECK ENGINE LIGHT CODES

Lexus vehicles 1990-1995 codes

If you don't have, OBD1 SCANNER you can use jumper wire .
To get the codes yourself, turn the engine off and connect a jumper wire (Or a paper clip works too) between terminals TE1 and E1 of the diagnostic terminal connector located in the engine compartment or under the left side of the dash. When you turn the key on (do not start engine), the check engine light lamp in your dash panel will start to flash the codes. Codes are usually shown in 2 digits numbers like code 24 is 2 flashes, a pause and 4 flashes. A pause of 2.5 seconds will follow the next code. When all codes are transmitted, the entire code will be flashed again after 4.5 seconds.Clearing the codes is simple that is done by removing the fuse of the EFI from junction box 2 for 10 seconds. Make sure to remove the jumper wire and switch the key off before clearing the codes.Here are some common Lexus vehicles 1990-1995 codes:Code 12 and Code 13 Rpm signal circuit faultCode 14 Igniter signal circuit faultCode 16 ECT control signal faultCode 21 and Code 28 Main oxygen sensor fault (for ES300; SC300 & GS300 models)Code 22 Coolant temperature circuit faultCode 24 Intake temperature sensor circuit faultCode 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 faultCode 42 Vehicle speed sensor circuit faultCode 43 Starter signalCode 51 Switch condition signal fault (for ES300; GS300 & SC300 models)Code 52 Code 52 and Code 55 Knock sensor circuit faultCode 71 EGR system circuit fault (for ES300; GS300 & SC300 models)Code 78 Fuel pump control circuit fault (for GS300 & SC300 models)