Toyota Celica P0325: Knock Sensor “1” – Circuit Malfunction

P0325 is a powertrain OBDII trouble code that has the same meaning for the Toyota Celica 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 or … Read moreToyota Celica P0325: Knock Sensor “1” – Circuit Malfunction

Toyota Celica P0420: Catalyst System Efficiency → Below Threshold → Bank 1

    This page is meant to help you troubleshoot the Toyota Celica P0420 trouble code. It covers P0420 meaning, symptoms, causes, and possible solutions. WIth the Celica, 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 can cost … Read moreToyota Celica P0420: Catalyst System Efficiency → Below Threshold → Bank 1

Toyota Celica: Flashing Check Engine Light Diagnosis

A flashing check engine light is your Toyota Celica’s way of saying “I have a serious problem, don’t ignore me”. Most of the time, that serious problem is a misfire.  This flashing light should not be ignored.  When your engine is misfiring, it is dumping raw fuel into the exhaust.  This raw fuel can detonate, … Read moreToyota Celica: Flashing Check Engine Light Diagnosis

Toyota Celica P0132: Oxygen Sensor High Voltage (Bank 1 -Sensor 1)

  P0132 is a common OBDII code that occurs in many vehicles, including the Toyota Celica. 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 cause … Read moreToyota Celica P0132: Oxygen Sensor High Voltage (Bank 1 -Sensor 1)

Toyota Celica P0122: TPS “A” Circuit Low Input

P0122 is a common trouble code with the Toyota Celica. 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 be … Read moreToyota Celica P0122: TPS “A” Circuit Low Input

Toyota Celica P0128: Coolant Thermostat – Below Temp

P0128 is a relatively common OBDII trouble code. It is triggered when your Toyota Celica‘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+).   Celica P0128 Symptoms There aren’t many symptoms with P0128, unless … Read moreToyota Celica P0128: Coolant Thermostat – Below Temp

Toyota Celica P0121: TPS → Switch “A” Circuit Range → Performance Problem

P0121 is a relatively common trouble code with the Toyota Celica. 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 can … Read moreToyota Celica P0121: TPS → Switch “A” Circuit Range → Performance Problem

Toyota Celica P0741 OBDII Transmission Code Diagnosis

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