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Lexus Problems

RepairPal has identified the most common problems for 43 Lexus models based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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168
Known Problems

The inside rear view mirror may become discolored or difficult to see clearly from. A revised mirror is available to correct this concern.

The 1998-2003 Lexus RX300 may start and stall, or start and run at very low engine speeds when the engine is cold. 

The issue is a failed or dirty idle air control valve. This valve is mounted under the throttle body, and modulates airflow to the engine under certain conditions. When the valve becomes dirty, or when the valve fails, proper airflow to the engine is not achieved. This results in start and stall, and low RPM.  

To correct the issues, the idle air control valve will need to be tested, and cleaned or replaced. 

To help decrease the frequency of this issue, change the air filter no less than once per year. 

Intermittent failure of a purge control valve in the evaporative emission system can cause the Check Engine Light to illuminate. A failed valve should be replaced to correct this problem.

 

The Check Engine Light may illuminate due to an EVAP system fault. These faults are commonly EVAP canister or gas cap related. Our technicians recommend diagnosing the stored fault codes before replacing any components.

Debris can get into the idle air control valve. This will restrict the air flow into the engine, causing idle speed and/or stalling when cold. The valve can be cleaned or replaced to correct this concern.

The Check Engine Light may illuminate with codes P0171 and/or P0174 due to a lean running engine. Symptoms may include: Hesitation on acceleration, lack of power, and poor fuel mileage. This is commonly caused by a dirty mass airflow sensor. Our technicians tell us the sensor may be cleaned using an approved cleaner but replacement is often required to correct this issue.

A shift "lag" may be noted when accelerating from speeds of 10 to 20 mph. A software update for the transmission control module has been released which may correct this concern. Software updates are commonly most effective on newer vehicles. Higher mileage vehicles may exhibit a similar symptom caused by a component failure. However, whenever major transmission repairs are performed the transmission software should be checked and updated as necessary.

On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.

The inside rear view mirror may become discolored or difficult to see clearly from. A revised mirror is available to correct this concern.

Clunking noises from the front suspension may be caused by the top front shock mount, which has been redesigned.

Occasionally, the Check Engine Light is illuminated due to failures in the evaporative emission (EVAP) system. Our technicians tell us that proper diagnoses is generally required to confirm the exact fault causing the warning light to come on.

The Check Engine Light may illuminate with code P0867 and/or P0990, related to the transmission fluid pressure sensor. Our technicians tell us a revised transmission fluid pressure sensor and upgraded software are available to correct this concern.

Sludge can build up in the engine because Lexus did not recommend frequent enough oil changes. Lexus will sometimes offer a discount on cleaning the engine if necessary. Owners who changed their oil every 3,000 miles did not experience these problems. This sludge build up can lead to excessive oil consumption.

The Check Engine Light may illuminate on vehicles with an automatic transmission, with codes P0751, P2714, or P0894 stored. Our technicians tell us these may be "false" codes. Revised powertrain control module (PCM) is available to correct this concern.

Intermittent failure of the purge control valve in the evaporative emissions (EVAP) system may cause the Check Engine Light light to illuminate.