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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

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.

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 Lexus RX300 has a known issue with the valves that if left unchecked, will cause burned valves and engine performance issues. 

The engine ‘breathes’ through valves that are pushed open by the camshaft, and closed by springs. When valves are closed, they seal against a valve seat. In this vehicle, the valve seat is too soft, so after the valve contacts it thousands of times, it becomes crushed. Once it is crushed, the valve can no longer make a proper seal, and the valves erode due to extreme temperature (burnt valve).

Symptoms related to this issue:

To repair the burnt valves, the cylinder head must be removed and rebuilt, which is a costly internal engine repair, however, this issue can be prevented through inspection and adjustment of valve clearances every 40,000 miles.

The Lexus ES300 has a known issue with the valves that if left unchecked, will cause burned valves and engine performance issues. 

The engine ‘breathes’ through valves that are pushed open by the camshaft, and closed by springs. When valves are closed, they seal against a valve seat. In this vehicle, the valve seat is too soft, so after the valve contacts it thousands of times, it becomes crushed. Once it is crushed, the valve can no longer make a proper seal, and the valves erode due to extreme temperature (burnt valve).

Symptoms related to this issue:

To repair the burnt valves, the cylinder head must be removed and rebuilt, which is a costly internal engine repair, however, this issue can be prevented through inspection and adjustment of valve clearances every 40,000 miles.

The Check Engine Light may illuminate with code P0AA6 stored for a hybrid battery isolation fault. Our technicians tell us this may be caused by water intrusion into the high voltage battery case. The water may be a result of cracking body seam dealer above the rear door strut mount. Any water leaks should be repaired and the high voltage battery system inspected for water damage and repaired and dried as necessary.

The Check Engine Light may illuminate with a fault code P0505 stored. Our technicians tell us that this fault can be caused by a failed electronic throttle body assembly which will require replacement.

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.

The Check Engine Light may illuminate with a code P0335, crankshaft sensor fault. Our technicians tell us upgraded powertrain control module (PCM) software is available to correct this concern.

The Check Engine Light may illuminate after a cold start with an engine misfire code stored (P0300 - P0306). This condition can be caused by faulty valve lash adjuster and/or valve spring. Our technicians tell us that revised parts are available to correct this concern.

The Check Engine Light may illuminate with code P0172 and/or P0175 stored. Our technicians tell us a powertrain control module (PCM) software update is available which may correct this concern.

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.

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.

The Check Engine Light may illuminate with an engine misfire code stored (P0300 - P0306). Our technicians tell us upgraded software is available for the powertrain control module (PCM) which may correct this concern.

The Check Engine Light may illuminate with stored codes P0133 and/or P0153. These may be "false" codes which can be corrected by reprogramming the powertrain control module (PCM) with upgraded software.

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.