20 Most Recent 1990 Lexus LS 400 Questions & Answers

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 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)

does it not unlock any of the doors? if it doesnt unlock any doors run down to the dealer and give them your vin number they will be able to cut you a key based on that. make sure you take your registration to prove you own the car. fortunately your car is the first gen ls400 because if it was much newer it would have had to had a key programmed to start it. keys at the dealer shouldnt be too much but if they are too expensive, just snag a blank off ebay they are only about 10 bucks. good luck!

my radio is not working today changed my battery and i don't know my code

Hello hayeizmyhome...Very low mileage for a 1990 model. However... this is usually around the mileage interval the dreaded instrument cluster, panel and dash light failures start...lights will flicker, then go out, gauges will start going up and down, lcd's will become hazey and hard to read....etc.
The instruments are illuminated both day and night while the ignition is on.
When the ignition is off, the panel goes dark and you can’t see the gauges at all.
The lexus has an electronic circuit board behind the inst. cluster that has been the problem. Very expensive repair if done by dealer.
*TIP* This circuit board can be repaired if you know a good electrical technician much cheaper.
The recommended timing belt replacement interval on the LS is 120k...water pump should be replaced also, the timing belt runs the water pump. The LS has a non-interference engine, meaning if the belt breaks, no damage will be done to the engine...
Hope this answers your questions..and your lexus runs for many more miles...with proper care and maintainnace, it will.

most probably a torn lower suspension arm rubber bush that would not show up if the car was on a 4 post hoist there is a problem there as the noise would not be evident if there was nothing wrong different tire pressures will give different noise when hit with a tire lever ( a trick used by truck drivers to check for flat/ under inflated tires good tire solid sound low pressure tire a dull sound

Front of intake on the drivers side see link DIY Coolant Temperature Sensor change PICS Club Lexus Forums

Remove the rear seat to access the fuel pump cover.

need to have the car scanned but posible internl problem on the transmission

trans problem

And what do the o2 sensors say now when scanned?

On the top. Just climb up and try to see it. A hidden device

Check the linkages between gear shift and Box could be loose. If these are OK get a transmission service by a good Auto Transmission shop

One filament, in the bulb, is burned out. remove the bulb, look through it and see if it has two filaments. replace if necessary.

Hi Jorge. Por ahora, s?lo conduce a la misma velocidad que todos los otros conductores. En ese a?o, un problema com?n estaba poniendo demasiado lubricante en el cable del veloc?metro, causando que se pegue. Golpe? el tablero de la rociada unas cuantas veces y ver si eso lo har? correr. Quiz? deba reemplazar el racimo del instrumento. A veces se encuentran disponibles en los patios de demolici?n del autom?vil.