Mitsubishi Montero P0325: Knock Sensor “1” – Circuit Malfunction

P0325 is a powertrain OBDII trouble code that has the same meaning for the Mitsubishi Montero 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 moreMitsubishi Montero P0325: Knock Sensor “1” – Circuit Malfunction

Mitsubishi Montero P0420: Catalyst System Efficiency → Below Threshold → Bank 1

    This page is meant to help you troubleshoot the Mitsubishi Montero P0420 trouble code. It covers P0420 meaning, symptoms, causes, and possible solutions. WIth the Montero, 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 moreMitsubishi Montero P0420: Catalyst System Efficiency → Below Threshold → Bank 1

Mitsubishi Montero P0457: EVAP System – Leak Detected

P0457 is a somewhat common trouble code with the Mitsubishi Montero. This code references a number that is given to you when you plug your Montero into a OBDII scanner. P0457 Indicates that there is a leak in the Evaporative Emission Control (EVAP) System. It is similar to P0455 (large leak) and P0456 (small leak) … Read moreMitsubishi Montero P0457: EVAP System – Leak Detected

Mitsubishi Montero: Flashing Check Engine Light Diagnosis

A flashing check engine light is your Mitsubishi Montero’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 moreMitsubishi Montero: Flashing Check Engine Light Diagnosis

Mitsubishi Montero P0132: Oxygen Sensor High Voltage (Bank 1 -Sensor 1)

  P0132 is a common OBDII code that occurs in many vehicles, including the Mitsubishi Montero. 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 moreMitsubishi Montero P0132: Oxygen Sensor High Voltage (Bank 1 -Sensor 1)

Mitsubishi Montero P0122: TPS “A” Circuit Low Input

P0122 is a common trouble code with the Mitsubishi Montero. 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 moreMitsubishi Montero P0122: TPS “A” Circuit Low Input

Mitsubishi Montero P0128: Coolant Thermostat – Below Temp

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

Mitsubishi Montero P0121: TPS → Switch “A” Circuit Range → Performance Problem

P0121 is a relatively common trouble code with the Mitsubishi Montero. 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 moreMitsubishi Montero P0121: TPS → Switch “A” Circuit Range → Performance Problem

Mitsubishi Montero P0741 OBDII Transmission Code Diagnosis

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