20 Most Recent 1990 Lexus LS 400 - Page 2 Questions & Answers


Most car alarm and stereo installers may be able to help you. I took apart the driver's door lock on one vehicle, removed the tumblers and reassembled it but eventually someone messed with it and I was stuck

1990 Lexus LS... | Answered on Jan 28, 2015


Yes if it has a program key

1990 Lexus LS... | Answered on Dec 24, 2014


If u have repaired coolant problem and light well not reset. Problem is not fixxed then. Look for something minor like cap on not holding correct pressure overflow tank has a sensor inside that may be bad.

1990 Lexus LS... | Answered on Nov 26, 2014


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)

1990 Lexus LS... | Answered on Nov 18, 2014


Best bet is the it to a toyota dealershipnor Napa and have them hook up the computer. They will tell you if your timing is off.

1990 Lexus LS... | Answered on Aug 26, 2014


Please check plugs, plugs wires and distributor connection

1990 Lexus LS... | Answered on Aug 19, 2014


check for spark from the spark plug wire pull the plug wire put a screw driver in the wire hold it by the plastic handel so the shaft of the screw driver is close but not touching a ground and watch for a spark be careful not to get shocked or see if the fuel pump is bad sometimes you can hit the gas tank with your hand while you turn the engine over you have to hit hard and fast while trying to start it this means the fuel pump is bad if it starts because it will stop again

1990 Lexus LS... | Answered on Aug 19, 2014


Water or contaminants in the fuel system or possibly a bad plug wire? It can also have developed a vacuum leak at the intake manifold or an emissions system failure is possible first check your sparkplug wires that's the cheapest route! I feel like it might just be a plug wire is broken and is jumping spark or the timing belt may be stretched? Look at your mileage if around 100,000 miles then plugs and wires may be at fault?

If you need further help, reach me via phone at https://www.6ya.com/expert/james_8f14c50d9c6cdea8

1990 Lexus LS... | Answered on Jul 31, 2014


Check your brake wires connections because it seems that some wires are inccorectly installed and need to to inspected and refixed

1990 Lexus LS... | Answered on May 31, 2014


check engine temperature could be overheating or you have faulty throttle control motor.could have faulty mass air flow sensor.have vechicle code scan before buying new parts.

1990 Lexus LS... | Answered on May 13, 2014


Your fuel pump or fuel pressure regulator are not supplying constant fuel pressure. Too much or too little is causing it to kill. You can pull the vacuum line from the regulaor and check for gas. If there is none, you need a pump, it is weak.

1990 Lexus LS... | Answered on May 13, 2014


Go to Car-Part.com-it is a nationwide locator of used car parts. Otherwise, try ebay or Amazon, and search on there.

1990 Lexus LS... | Answered on May 12, 2014


Unlock them and then operate the handle.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/justin_3ae27a9d61d6acd4

1990 Lexus LS... | Answered on Apr 15, 2014


Over heating

1990 Lexus LS... | Answered on Mar 03, 2014

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