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Location what location is the heated oxygen sensor( rear ) is at, before the cat or after , on a 2000 maxiam se (bank 2) code p0430

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It's the one down by the cat, has 3 wires.

Posted on Jul 14, 2009


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Where is the location of the oxygen sensor and heated oxygen sensor of kia rio 2004? i have error code P0038 and P0136 on my car. also, what can i do to fix it? please help. Thanks a lot and God bless


code p 0038 refers to heated oxygen sensor (HO2S) 2 bank 1 heated control --circuit low===causes --wiring short to positive --- HO2S--- ecm
code p 0136 refers to HO2S 2 bank 1 circuit malfunction===causes --heating inoperative --wiring-- HO2S
it also refers to HO2S --no signal===causes ---wiring --HO2S
bank 1 is the bank closest to the fire wall and heated oxygen sensors(HO2S) are always in the exhaust manifold/pipe before the cat converter
the wires in the HO2S are delicate so always use the correct sensor socket for removal and installation of the sensors

Jan 10, 2017 | Kia Cars & Trucks

1 Answer

Po136-o137 says change 02 sensor on bank 1 sensor2 I did but engine light is still on 2004 chevy tahoe


code p 0136 refers to heated oxygen sensor (HO2S) 2 bank 1 ---circuit malfunction===causes ---heating inoperative ---wiring---HO2S--- ECM
also refers to oxygen sensor (O2S0 2 bank 1---circuit malfunction===causes --- wiring---O2S ---ecm
it also refers to heated oxygen sensor (HO2S) 2 bank 1 ---no signal===causes ---wiring --- HO2S---
code p 0137 refers to HO2S 2 bank 1 ---low voltage -===causes --exhaust leak---wiring short to ground ---HO2S--- ECM
it also refers to O2S 2 bank 1---low voltage ===causes exhaust leak---wiring short to ground ---O2S ---ECM
to set you up here-- there are 4 oxygen sensors in the system
2 are heated oxygen sensors (HO2S) on in each exhaust manifold or exhaust pipe before the cat converter and
2 oxygen sensors (O2S) -- one in each exhaust pipe after the cat converters
heated oxygen sensors have 4 wires and O2S sensors normally only 2 wires
it is more that possible that you changed the wrong sensors and in the process damaged the delicate wires with the incorrect spanner being used

Jul 25, 2016 | 2004 Chevrolet Tahoe

1 Answer

Oxygen sensor heater circuit bank 2 sensor 1 located 05 endeavor


in the exhaust manifold of the front bank or before the cat converter
bank 2 is closest to the grill and bank one is next to the fire wall
the heated oxygen sensor is before the cat converter and the normal oxygen sensor is after the cat converter

Jun 19, 2016 | 2005 Mitsubishi Endeavor

1 Answer

I have the code p0139. replaced o2 twice, need to track down the wiring. does anyone have some advice?


code p 0139 refers to heated oxygen sensor (HO2S) 2 bank 1--slow response===causes --heating inoperative--wiring--HO2S
or
oxygen sensor(O2) 2 bank 1---slow response===causes--wiring ---O2 sensor
as you have replaced the O2 sensor twice with no results then it will be the heated sensor that is faulty
heated sensors are the units in the exhaust manifold of exhaust pipe before the cat converter and O2 sensors are the units after the cat converter
It is normally the HO2 sensor that fails and the wiring problem is from not using the correct special socket for installation or removal that causes damage to the fragile wires to the unit

Feb 19, 2016 | 2001 Dodge Stratus

2 Answers

What is P0157 code for 2006 saturn Vue


Bank 2 sensor 2 fault. That would be the downstream oxygen sensor for bank 2.

Aug 03, 2015 | Saturn Cars & Trucks

1 Answer

Nissan pathfinder p0430


A code like yours may mean that one or more of the following has happened: The catalytic converter is no longer functioning properly An oxygen sensor is not reading (functioning) properly There is an exhaust leak Possible So

Jul 20, 2014 | 2003 Nissan Pathfinder

2 Answers

Code p0159 what is this


159, (USA?) must be V6 or V8 it has 2 banks.
first google hit
Possible causes
- Faulty Rear Heated Oxygen Sensor Bank 2
- Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

let me condense this.
1: the right bank rear 02 sensors is reading wrong,
note I did not say it was bad. dig?
2: this means the CAT on that side, is UNHAPPY.

unhappy can be , as it said air leaks anywhere near the front or rear of Bank 2 CAT.
unhappy 2, is the engine fuel controls are totally out of control
way rich or lean, out of control;
unhappy3, gross misfire, or all the above at once.

the ECU(pcm) at no time ever KNOW what is wrong, it only can flag bad inputs. or tests that fail , tests are called (USA,OBD2 SAE) called Monitors.
do you have a full can tool? or just a near useless codereader.
?

Oct 15, 2013 | 2004 Jeep Grand Cherokee

2 Answers

P0138 and p0158


These codes, po 138 bank 1 sensor 2 shorted to voltage and code po158 means bank 2 sensor two shorted to voltage. these are the two rear oxygen sensors in the exhaust system. there two up frt and two in the rear, check the wiring on the two rear sensors, make sure that the wiring is not cut or stuck between metal. if the wiring is good then replace both rear sensors, when you get them ask for the left and right after the cat sensors. or bk1 s2 and bk2s2. after replacing them reset the computer. go to an auto parts sotre or if you have a code reader you can do it. hope this helps good day.

Feb 19, 2012 | 2004 Dodge Stratus

1 Answer

Light just came on when started vehicle. Another code followed P0430. Vehicle seems to run fine. thanks


P0430 - Catalyst System Efficiency Below Threshold Bank 2

The ECM or PCM monitors the switching frequency ratio of heated oxygen sensors 1 and 2.

A three way catalyst converter(Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst (Manifold) malfunction is diagnosed.

catalytic_converter.gif

Possible Causes:
- Three way catalyst converter Bank 2
- Exhaust tube
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module

Possible Solutions:
The most common cause it the three way catalyst converter Bank 1.

If the P0430 is combined with other DTC's try fixing those first and this code may clear.

Jan 30, 2011 | Nissan Armada Cars & Trucks

1 Answer

Getting OBD codes p0420 and p0430, how to fix these issue with my 2001 Audi A6


2001 Audi A6
EOBD code: P0420
Fault location: Catalytic converter system, bank 1 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

EOBD code: P0430
Fault location: Catalytic converter system, bank 2 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

Sep 14, 2010 | 2001 Audi A6

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