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I have a trouble code po131 sensor1 bank 1 sensor can anyone tell on a 2.4 Mitsubishi galant 2.4 it has a 4 cylinder and on the exhaust on top 2 sensors each side on the Catalina convetor has 2 senso

Po 131 what and which sensor is it 2.4

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Sensor #1 is the one closest to the motor,
before the converter

Sensor #2 is in the outlet of converter

Posted on Dec 05, 2014

Testimonial: "So on my 2005 mitsubishin galant 2.4 4 cylinder would mean that both upper sensor are bad because remember in the manifold it has 2 sensor 1 on each side and 2 sensor on the catalytic if I got a code trouble po 131 senseor 1 bank 1 sensor would be both sensor on top are bad thank you for your help I never see 4 sensors on a 4 cylinders 2 on top 2 bottom"

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  • Tom hale Dec 09, 2014

    Thanks for your help but I meant ti say po 135

  • Tom hale Dec 09, 2014

    I never seen two O2 sensors on the exhaust manifold n 2 on the catallic convortor

  • Anonymous Dec 09, 2014

    You have to look at scan tool data & also component test sensors before you replace them They may not be the problem Have to use the codes in your diagnostic approach & testing

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I am getting the following codes on my 2002 Nissan Altima v6 3.5 liter P1430, P1420, P1805, P1152, P1102, P1011, P1021 & P1335 I'm going crazy here. Please help!


Definition of Diagnostic Trouble Code P1430 Ford: Electric Air Pump Secondary Lincoln: Electric Air Pump Secondary Mazda: Electric Air Pump Secondary Mercury: Electric Air Pump Secondary Toyota: Intake Constrictor CTRL Circuit Open or Short

Definition of Diagnostic Trouble Code P1420 Audi: Second Air Injection Valve Circ Electrical Malfunction BMW: Secondary Air Valve Control Circuit Electrical Buick: Intake Air Low Pressure Switch Circuit Low Voltage Cadillac: Intake Air Low Pressure Switch Circuit Low Voltage Chevrolet: Intake Air Low Pressure Switch Circuit Low Voltage Chrysler: Register Resonant Charging 1 (RRC1) Dodge: Register Resonant Charging 1 (RRC1) Ford: Catalyst Temperature Sensor GMC: Intake Air Low Pressure Switch Circuit Low Voltage Honda: Nox Adsorptive Catalyst System Efficiency Below Threshold Catalytic converter Jeep: Register Resonant Charging 1 (RRC1) Lincoln: Catalyst Temperature Sensor Mazda: Catalyst system efficiency below threshold (bank 1) Mercedes: AIR Pump Switch over Valve Mercury: Catalyst Temperature Sensor Oldsmobile: Intake Air Low Pressure Switch Circuit Low Voltage Pontiac: Intake Air Low Pressure Switch Circuit Low Voltage Saturn: Intake Air Low Pressure Switch Circuit Low Voltage Subaru: EVAP Purge Control Solenoid Circuit High Input Toyota: SCV Control Circuit Malfunction Volkswagen: Second Air Injection Valve Circ Electrical Malfunction

Definition of Diagnostic Trouble Code P1805 Ford: Four wheel drive high indicator circuit failure Lincoln: Four wheel drive high indicator circuit failure Mazda: (4WD) High Indicator Open Circuit Mercury: Four wheel drive high indicator circuit failure Toyota: SB Solenoid Circuit Malfunction

Definition of Diagnostic Trouble Code P1152 Audi: Bank1, Long Term Fuel Trim, Range 2 Leanness Lower Limit Exceeded BMW: Oxygen Sensor Heater Circuit Low Voltage (Bank 2 Sensor 1) Ford: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Rich Jaguar: Lack of H02S-21 switch, sensor indicates rich Land Rover: Oxygen sensor response time bank 2.Short circuit to ground Lincoln: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Rich Mazda: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Rich Mercury: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Rich Subaru: Oxygen sensor range /performance problem (Low) Volkswagen: Bank1, Long Term Fuel Trim, Range 2 Leanness Lower Limit Exceeded Volvo: Oxygen Sensor Front, Bank 2

Definition of Diagnostic Trouble Code P1102 Acura: Mass Airflow (MAF) Sensor Lower Than Expected Comprehensive Audi: Oxygen Sensor Heating Circuit,Bank1-Sensor1 Short to B+ Chrysler: HEV Stop Request Performance Dodge: HEV Stop Request Performance Hyundai: MAP Sensor Circuit Low Input Jeep: HEV Stop Request Performance Kia: Heated Oxygen Sensor Bank 1 Sensor 1 Heater Circuit High Input Land Rover: Throttle to air flow plausibility not active.Last occurrence - minimum signal Mazda: Mass Air Flow Sensor In Range But Lower Than Expected Mitsubishi: Traction Control Ventilation Solenoid Circuit Porsche: Heated Oxygen Sensor 1 Ahead Of TWC Heater Short To B+ Saab: Front Heated Oxygen Sensor Bank 1, Control Module Input, Current in Pre-Heating Circuit Too High Subaru: Pressure Sources Switching Solenoid Valve Circuit Malfunction Volkswagen: Oxygen Sensor Heating Circuit,Bank1-Sensor1 Short to B+ Volvo: Power Stage Group B

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Definition of Diagnostic Trouble Code P1021 Honda: Valve Pause System Stuck On Comprehensive Mitsubishi: OCV OPN. Bank 1 Saab: Injector Cylinder 2 Shorting To Ground Toyota: OCV for VVTL Open Malfunction (Bank 2)

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Jun 29, 2015 | Nissan Cars & Trucks

1 Answer

Position of oxygen sensors


all you have to do is follow the exhaust from the manifold back and you will come to the sensors. bank 1 O2 sensor is on the bank cylinder 1 is and bank 2 O2 sensor is located on the bank cylinder 2 is on. the first sensors you come across is sensor 1 then the next sensor you come across sensor 2 and so on. so you can have a sensor code like bank 1 sensor 2 meaning the sensor on bank one but the sensor is the 2nd sensor in the exhaust.

Jun 25, 2015 | 2002 Mitsubishi Galant

1 Answer

PO131 PO151 PO154


codes PO131 PO151 PO154 okay. code PO131 - o2 sensor circuit low voltage bank 1 sensor 1. code PO151 - o2 sensor circuit low voltage bank 2 sensor 1. code PO154 - o2 sensor circuit no activity detected bank 2 sensor 1

May 19, 2013 | 2000 Nissan Xterra

1 Answer

Where is bank 1 sensor 2 located in a 1996 mitsubishi galant s?


Locate the number 1 spark plug and then locate the O2 sensor in the exhaust. The one you see nearest the cylinder head is number 1. Look underneath the vehicle and locate the catalytic converter and the number 2 sensor is just before the "cat" and the one after is the Bank 2 sensor 2. I believe that the number one cylinder is closest to the radiator and the front of the engine. If this is a 4 cylinder car it is the sensor in the exhaust just prior to the catalytic converter. You will need a 7/8" or 22mm wrench and a good rust penetrant to remove the sensor without incident. Let me know if you need anything else.

Jul 10, 2011 | Mitsubishi Galant Cars & Trucks

1 Answer

Im changing an 02 sensor Bank 1 Sensor 2 on an 03 mitsubishi galant 3.0L. which set of cylinders is Bank 1, front or rear?


bank one is the one facing the rear of the vehicle with the number one cylinder ,, and believe it or not the firing order is 1 2 3 4 5 6

Jun 14, 2011 | Mitsubishi Galant Cars & Trucks

1 Answer

Check engine light is on, had checked, code is for oxygen sensor. but which one?


the code should have said which 02 sensor it was(bank 1 sensor1,bank 2 sensor 1 or sensor 2)if its a 4 cylinder then sensor 1 is the first sensor in the exhaust system going from the front towards the rear.sensor 2 is the sensor that is after the catalytic converter.if its a v6 then bank 1 is the side of the motor cylinder 1 is on and bank 2 is the opposite side of were #1 cylinder is.

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2 Answers

I have a problem with check engine, in the scanner is appear the code P0136 O2 1/2 and I do not know which sensor is this, my car is a Mitsubishi Galant 1998 the engine es 4G64 2.4cc


p0136 02 sensor malfunction is (bank 1 sensor 2)-- replace 2nd 02 sensor thats in exhaust system. If it is a four cyclinder, then there is only one bank. if its a six then bank 1 is on the side of # 1 cylinder. bank 1 sensor 2 is after convertor. have a good day !

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3 Answers

Whats the difference between up and downstream sensor on a chevy s10 1997, what exact sensors do i need for bank 1 and bank 2 sensor1


Well upstream from the Catalatic Converter means towards the engine and that would be the location for Sensor #1 on both sides of the engine. And Downstream would be away from the engine past the Catalatic Converter For Sensor #2 on both sides of the engine. Bank 1 or Bank 2 would indicate which side of the engine the trouble is on. ( Bank #1 is the side of the engine that contains #1 Cylinder. Please remember if you are going to change one 02 Sensor then you should change all of them and be sure to clear all codes after all repairs are finished. that will turn the check engine light off. Good Luck and have a good XMASS.

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2 Answers

Where is the O2 Sensor located on 2003 Ford Focus? Check Engine Light is on and trouble shooter device says the problem is in the O2 Sensor Heater Circuit, but where is it located.


The code will tell you which O2 sensor it is.
The code will point to either bank 1 sensor 1; bank 1 sensor 2; bank 2 sensor 1; bank 2 sensor 2.

From what I remember with a focus, it should only have 2 sensors, sensor 1 will be located before the cat, and sensor 2 will be located after the cat.

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2 Answers

2005 gallant with O2 sensor engine light is one...how do I fix it?


have the engine light code scanned, and it'll tell you if it's bank 1 sensor 1, bank 1 sensor 2, bank 2 sensor 1, bank 2 sensor 4.

Bank 1 is on the same side as Cylinder 1
Bank 2 is on the opposite side of Cylinder 1

Sensor 1 is located before the catalytic converter.
Sensor 2 is located after the catalytic converter

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