Question about 2006 Suzuki Forenza

2 Answers

Engine light on code reads bad cat replaced it light returns reads ox senors replaced it light returns reads cat gone bad.

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 26 Answers

Just remove the batt for 15 mins and check

Posted on Nov 08, 2013

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Suzuki Master
  • 20,706 Answers

The ECU (brain) has no idea at ALL what is broken!
it only knows 2 things, bad inputs. and failed tests.
nothing else. The brain is not AI (artificial intelligence)
Not even and expert system , yet.
that is the job of and ASE mechanic
to find the cause. and not GUE$$.

your failure to state the DTCs reported , sorry, is bad news to anyhelper, sorry!
420s. is , weak CAT test. but in most case it's not the CAT.
senors replaced? 1 or both.? B1S1 and B1S2?

Did you get o2 (oxy) DTC failures?, if yes, ignore all cat fails.!
if other codes/ DTC, that too, means ignore cat failure.
the CAT monitor (P042x) only is valid if the engine runs prefectly.
if not the CAT overheats or underheats( goes dead cold)\

the cat will over heat, (cel flash madly) for gross engine over fueling (1 example , bad fuel reg, and pressure at 60PSI)
the cat glows red hot , or near. and the test may fail.
case 2: the engine (AFR fuel) is grossly lean the CAT may go under temperature and drop off line.
we call this CAT no lit off, it has a minium working temperature.
as air leaks in front of the cat causes EFI to go very rich.
and leaks behind can make the rear 02 go nuts. and lie
and say, bad Cat.
all this is the domain of the ASE mech. he knows all stuff.
and never ever lets the ECU tell him what to do.;
it does tell him (suggests) a battery of test.
sure.
hope that helps,
post all stored, DTC,all pending and the full freeze frame data
and if cagey? the closed loop status hot idle.

Posted on Oct 14, 2013

  • 11 more comments 
  • _-__-___-_
    _-__-___-_ Oct 20, 2013

    btw2, my cat was filled to top with Antifreeze and engine oil, i drove it (new engine) for 50 long miles, and baked it dry, it woke up, and started working 100% , passing the P042x tests. proving there is always hope for the cat. I did this just to prove that fact. I had my EFI running first in closed loop at idle and light cruise. so that fact allowed the cat to bake dry, if EFI is in Limphome mode, none of this works. at all.

  • _-__-___-_
    _-__-___-_ Oct 23, 2013

    first get engine running perfect. the let cat bake dry, and self clean. if not getting smog checks most folks ignore, it, but if you have air leaks, near the 02 sensors that does make the engine run bad. check fuel trim and closed loop status for normal running of the 02 sensors. if they are all 100% good the cat is bad.

  • _-__-___-_
    _-__-___-_ Oct 24, 2013

    the ECU on some cars skip the P042x test, if other DTCs are stored, but the ECU can lul its self in to think all spark and EFI fueling is perfect and then run the P42x monitor. (bad luck) The CAT can be overloaded, (read the spec on cats. ) If the Engine is running real bad, do not look at P042x (its last to worry) if you have full power, no DTCs, no pendings, for misfire. and LTFT long fuel trim is good say -4% ,then it might be just and crack near B1S2 (rear o2sensor) or hell the wires fell off or or melted, or B1S2 migth be just bad. A new cat can cost $1000 installed you can buy a new PNP sensor for $50 and screw it in your self,(just plug it in) Some cats can in fact break up inside, causing huge back pressures, tesing this is easy with front 02 pulled and pressure gauge attached, max 2psi at 2500 rpm. it will be way less. dont let eager mech, throw on a cat , just to find out its not bad, the P042x means that the rear sensor reads wrong, NOTHING else.

  • _-__-___-_
    _-__-___-_ Oct 24, 2013

    gets it right !

  • _-__-___-_
    _-__-___-_ Oct 24, 2013

    h tt ps://w w w.discountconverter.com/catalytic_converters_news/news_page.cfm?Key=catalytic_converter-&News=120

  • _-__-___-_
    _-__-___-_ Oct 24, 2013

    remove spaces in http and www , and read the whole page, its the best ive ever seen. He hits every spot.

  • _-__-___-_
    _-__-___-_ Nov 08, 2013

    post the DTCs ! i presume you have a scan tool , right and know how to push the reset button, right? and know that the cat tests P042x are useless if the O2 are bad, or you have air leaks. post ALL DTCs, thrown after you reset them then drive 20mile, and see if all Oxy monitors and cat monitor is complete, if not drive more over 50mph. when the monitors complete, and NO DTCS is stored, then you fixed it, and be advised, throwing parts at DTCs is a big waste of cash, you make parts stores rich ! why not diagnose the real cause. why not?

  • _-__-___-_
    _-__-___-_ Nov 08, 2013

    the ECU on your car never ever knows what is broken

  • _-__-___-_
    _-__-___-_ Nov 08, 2013

    the ecu only can report tests (monitors) that fail, not PARTS!

  • _-__-___-_
    _-__-___-_ Nov 08, 2013

    do you have a scan tool? if yes, report actual. DTCs all of them.

  • _-__-___-_
    _-__-___-_ Nov 08, 2013

    your scan tool has a reset DTCs (all) button see that?

  • _-__-___-_
    _-__-___-_ Nov 08, 2013

    did you know that a simple air leak can cause all this? not $1000 in parts. do you?

  • _-__-___-_
    _-__-___-_ Nov 08, 2013

    what DTC'S? post them all.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Where is the PCM fuse located in the fuse box? There is nothing in the manual that indicates which fuse it is.


it costs nothing to have the codes read at auto parts stores. If you want not to waste money then read the fault codes first

Jan 30, 2015 | 2005 Toyota Sienna XLE

1 Answer

Check engine light on and rpm is high how do I fix it?


go to your local auto parts store and have them to hook up there meter to the car and get a reading on the code , places like autozone or advance do this free of charge. u may have a senor gone bad and this is why it is ideling high. hope this little bit help u out.

Feb 08, 2013 | Cars & Trucks

2 Answers

There is no problem only the service engine soon light is on and the car failed the emission test. The diagnostic trouble codes is po43


A code P0430 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
If the Ox sensor has never been replaced I would do that.. Its a lot cheaper than the CAT. The one that needs to be replaced is AFTER the Catalytic Converter.

A good shop should be able to tell if this is your issue or not though.

May 07, 2011 | Infiniti QX56 Cars & Trucks

2 Answers

During inspection I found out that a o2 sensor was bad but i was reading up on them and aparently there are four o2 sensors. 2 upper and 2 lower. How am i suppose to know what one is bad? secondly my...


The check engine light is blinking usually because of a misfire which can cause damage to the cat. The blinking check engine light does not necessarily mean the the cat is damaged.

The first thing you need to do is find out what codes are causing the check engine light to come on. If there is an O2 code it will help you identify the O2 sensor. The sensors are divided into to banks. Bank one is the same side of the motor as the number one cylinder. Bank 2 is the other side of the motor. Then they are divided into sensor 1 and senor 2. Sensor 1 is always before the cat. Sensor 2 is always after the cat. So if you had an O2 code for the Bank 2 sensor 1 O2 sensor it would be the opposite side of the engine from the number one cylinder and the sensor before the cat.

IMO, your first priority should be to figure out why the engine is misfiring and causing the check engine light to blink. Solving that first may take care of the O2 issues or the O2 could be the issue.

Dec 02, 2010 | 1999 Jeep Grand Cherokee

1 Answer

I just replacecoolant temp senor on a 2002 town and courty and both o2 sensor and hac the calst cov replace 2 time in the last past year why i still get p0420 code


P0420 is a code that suggests that the catalytic converter has gone bad. I couldn't tell by your post if you have replaced that or not but if you did and you used an aftermarket catalytic converter (one other than the dealer part) than that can be your problem. Aftermarket cats are not all the same or as good as the O.E. cats. Especially the universal fit type converters.

Oct 15, 2010 | Chrysler Town & Country Cars & Trucks

1 Answer

I have replaced all 4 ox senors before I replaced intake man. gaskets. It is a 97 chevy W/Truck with a V6 auto, auto trans. 2WD. now service engine soon light came on after about 200 miles, it will go off...


First did you clear all the fault codes after your repairs? The reason I ask is po131 is bank one oxygen sensor, po174 is engine lean from faulty oxygen sensor, and po171 is engine lean condition, possibly from vacuum leak (intake manifold gasket?), pcv valve,etc. To check for vacuum leak at intake, start engine and gently spray starting fluid around intake gasket. If rpm raise slightly while doing this then there is a vacuum leak(stay away from air filter intake and housing though), and the gasket will need to be replaced again.

Jan 09, 2010 | 1997 Chevrolet C1500

2 Answers

1997 LINCOLN TOWN CAR - CHECK ENGINE LIGHT( code P430)


I think you will find the aftermarket Cat Conv. is the source of your problem, but without hooking up to the factory test equipment at my disposal at my Ford dealer this at best and educated guess based on 20 years of emission related work, I am a Ford certified master electronics technician

Jan 30, 2009 | 1997 Lincoln Town Car

1 Answer

How to reset engine light no codes found


If the light is on, there are codes remaining. You can clear the codes, you'll need a scan tool, but if the problem isn't fixed the light will return.

On some cars you can disconnect the battery for 5 minutes and that will reset the codes, but I would recommend you DON'T do that. Use a scan tool and clear the codes properly. Good luck!

Dec 16, 2008 | 1996 Mercedes-Benz C-Class

1 Answer

2000 hundai accent engine light


sorry dealer only ,this information is not published ,go to dealer and lay the golden egg ----owing to complexity of the anti-theft systems and not allowing this information for general use to stop car theft ??well thats the excuse anyway .do you know a good solicitor who can sue them under the freedom of information act you have stateside .because in europe the problem is acute with no re -address.. .software encrypted so if you try to read it it just show anything with a general mechanics reader .are you preparing the golden egg ??ready for the dealer ??my advice if it runs ok leave well alone and throw you scan master or digisoft reader in the bin as it will not work on modern cars and the newer the car the less you can do with it.

Nov 18, 2008 | 2000 Hyundai Accent

1 Answer

Check engine light won't go away


i read it could be the mass air flow sensor and or faulty spark plugs. also be sure to check all the little vaccum hoses for cracks.

Aug 02, 2008 | 2000 Mazda Protege

Not finding what you are looking for?
2006 Suzuki Forenza Logo

269 people viewed this question

Ask a Question

Usually answered in minutes!

Top Suzuki Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Boyet Soriano
Boyet Soriano

Level 2 Expert

293 Answers

Are you a Suzuki Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...