Lexus IS 300 P0325: Knock Sensor “1” – Circuit Malfunction

P0325 is a powertrain OBDII trouble code that has the same meaning for the Lexus IS 300 as it would any other vehicle. By definition, it means that the vehicles ECM/PCM isn’t getting the proper signal to or from the knock sensor. Clearing this code typically requires a new knock sensor or correcting a short … Read moreLexus IS 300 P0325: Knock Sensor “1” – Circuit Malfunction

Lexus IS 300 P0420: Catalyst System Efficiency → Below Threshold → Bank 1

    This page is meant to help you troubleshoot the Lexus IS 300 P0420 trouble code. It covers P0420 meaning, symptoms, causes, and possible solutions. WIth the IS 300, OBDII P0420 is often caused by a bad oxygen sensor, but there can be other causes as well. Jumping straight to replacing the O2 sensor … Read moreLexus IS 300 P0420: Catalyst System Efficiency → Below Threshold → Bank 1

Lexus IS 300 P0132: Oxygen Sensor High Voltage (Bank 1 -Sensor 1)

  P0132 is a common OBDII code that occurs in many vehicles, including the Lexus IS 300. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. The air fuel sensor stays in rich biased mode for too long. There are also some less likely problems that can … Read moreLexus IS 300 P0132: Oxygen Sensor High Voltage (Bank 1 -Sensor 1)

Lexus IS 300 P0122: TPS “A” Circuit Low Input

P0122 is a common trouble code with the Lexus IS 300. It’s an OBDII code that references issues with the Throttle Position Sensor (TPS). It is relatively serious problem since it can leave your vehicle stranded or severely limited.     OBDII code P0122 is a serious problem that requires serious attention. Diagnosing it can … Read moreLexus IS 300 P0122: TPS “A” Circuit Low Input

Lexus IS 300 P0128: Coolant Thermostat – Below Temp

P0128 is a relatively common OBDII trouble code. It is triggered when your Lexus IS 300‘s coolant temperature fails to reach the proper operating temperature. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+).   IS 300 P0128 Symptoms There aren’t many symptoms with … Read moreLexus IS 300 P0128: Coolant Thermostat – Below Temp

Lexus IS 300 P0121: TPS → Switch “A” Circuit Range → Performance Problem

P0121 is a relatively common trouble code with the Lexus IS 300. It’s an OBDII code and has to do with the Throttle Pedal Position Sensor. It is relatively serious problem since it can leave your vehicle in failsafe mode.     OBDII code P0121 is a serious problem that requires serious attention. Diagnosing it … Read moreLexus IS 300 P0121: TPS → Switch “A” Circuit Range → Performance Problem

Lexus IS 300 P0741 OBDII Transmission Code Diagnosis

P0741 is a very common OBDII trouble code. It’s know to affect the Lexus IS 300 quite often. Here’s what it means: P0741: Torque Converter Clutch Circuit → Performance or Stuck Off The IS 300 uses a clutch in the torque converter to lock the engine and transmission together at highway speed. P0741 can register … Read moreLexus IS 300 P0741 OBDII Transmission Code Diagnosis