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BMW 2003 745LI brought from USA check engine light os on due catalitic convertor panc 2 problem how to solve this without changing the part it is expensive

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  • BRIAN HAMMONS May 11, 2010

    I would try to see if the catalitic con. is rely bad. Most of the time they will stop up but I don't think I have ever seen one actually go bad. A good exhaust shop can check the back pressure on the engine to see if it is stopped up or not.

  • Anonymous Mar 27, 2014

    just a check engine light



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I had a similar problem, had it diagnoses and found out it was actually the thermostat not allowing the engine to reach normal operating temperature thus signaling the Cat to throw an emission code. It sounds far fetched but the diagnosis and fix was correct. I had the thermostat changes, fuel injection service, new spark plugs installed all for $350 and I have never seen that "Check Engine Light" again. Plus, my car drives like new with improved gas mileage.

Posted on Jan 23, 2010


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Thecheck engine light comes on. It was checked and they said it had three possable problems. I. A valve on the manifold. 2. A catalitic convertor. 3. A oxygen sensor. I believe they said that you have to...

hahaha, go to a different place and check that engine check light again. go to autozone, advance auto or something. have them plug in the code scanner and it should give you exactly what needs to be change.

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Check engine light stays on.

you can diconnect the positive battery cable for 30 secs. or take it to autozone they can reset it for free. try waiting a day or two the engine must go through so many cycles without any problems before the light will go out. If it doesnt go out there is still a problem. More than likely if you changed catalitic converters and the light stays on it probaly has a bad O2 sensor.

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My check engine light is blinking and it feels like it wants to shut off and the catalyst conventer is orange? what needs to be change

Take the car to the dealer. Or better yet tow it there before you catch it on fire something is wrong with the engine or emission control system. This problem is causing raw gasoline exhaust to pass into the catalitic convertor where it is burning causing the cat to glow orange. This is very dangerous it can cause a fire.

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Change the bank 02 sensor went about 1500 miles check engine light back on with code p0430. W hen replace truck had more power and ran perfectly now I have the same problem

P0430 is a catalist efficiency code and if the vehicle lacks power it is possible that the cat could be plugged or melted inside. Catalitic convertor would need to be replaced if the case

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1999 Dodge Ram 5.9L 4X4 not enough fuel

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Engine light wont go off.

The catalitic converter is a mechanical device , it simply converts harmful emissions into water/vapour. The 02 sensor if faulty would put the engine management light on. If the 02 sensor has been faulty for sometime it could tell the ECU to supply the wrong amount of fuel to the engine which in turn would eventually damage the catalitic convertor. So you may have to change both in the end, but first I would check out the 02 sensor and replace if required.

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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

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2002 Alero check Engine light Codes P0132, P0137

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Catalytic converters

If you are going to change the convertors I would just replace the first one closest to the engine. But when a computer code says "bank" they usually are refuring to the Oxygen sensor that is there , they are classified as bank 1 and bank 2. 1 being closest to the engine and 2 being farther down the exhaust. If its a computer code that told you bank 1 you might need to look at your oxygen sensor instead of your catalitic converter.

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