I don't know why or how it works; but it worked. Acceleration can also be compromised. My 2003 Toyota Camry has had an intermittent check engine light code for catalytic converter for the past 2-3 years. One or more sensors may be sending faulty signals. I'm hoping that it's not the catalytic converter. The check engine light only comes on in certain conditions: If the check engine light is coming on intermittently, be sure to notice any changes in the performance of your vehicle when the light is on. Check the vacuum pressure on the intake manifold. An illuminated check engine light or malfunction indicator lamp (CEL or MIL) with a catalytic converter diagnostic trouble code (DTC) is the most common catalytic converter problem indicator. 25 Posts . Within a short period, you should see the pressure return to a figure close to the one you noted at idle. Intermittent Check Engine Light 4 Answers. FAQ: Social Groups: Calendar: Photo Albums: FAQ: Social Groups: Calendar: Mark Forums Read: Toyota 4Runner Forum - Largest 4Runner Forum > Toyota 4Runner Forum > 4th Gen T4Rs > Check Engine Light … More specifically, the sheet they printed says "Code P0430 indicates that the Bank 2 Catalyst System efficiency was below threshold for … The intake manifold sits on top of the engine, and the vacuum port will look like a small protruding plug. 14,870 Posts #21 • Dec 12, 2014. dfalgout said: My transmission broke 25 miles before the warrant went out. The Check Engine light flashing is a pretty much universal sign that you have a misfire that is bad enough that a lot of raw, unburned fuel is being dumped in to the Catalytic Converter, to the point that it could be ruined if the problem is not taken care of very quickly. Those compounds react with unburned fuel in an oxidation/heating process that completes the burn and neutralizes oxides of nitrogen (a component of smog). If the dealer did the repair, I think you have a good case to get them to take of the problem without charging you any more, because if they said a new cat will fix it and it doesn't then why did you pay for the first repair to begin with?? He holds a Bachelor of Fine Arts from the University of Saskatchewan. While you can replace it, the greater issue is that something is malfunctioning elsewhere in your system and is causing the plug. Dealer replaced the converter without repairing the underlying cause. I am getting different stories from different people on what it might be. This may very temporarily change the firing conditions of the engine and clear the check engine light, however if the O2 sensor is bad or the CAT is bad the problem is just going to come back and very quickly. Remember Me? Check your warning lights. We intermittently get the code for the rear cat converter (P0420, iirc) - however, it's very intermittent - I reset it and it's gone for months in some cases. I was always told that it was the catalytic Converter and mostly an issue with emissions, and not a huge deal if intermittent. Engine light still on. However, it did the job and we did not get a check engine light! The check engine light may come on if your gas cap is loose, allowing gas to evaporate. I am new to these boards. Almost gone. If your CEL is giving you the same code take it back for warranty. I had this same problem and the dealer wanted to place the catalytic converter. Yes. Replaced Bank 1 Exhaust Catalytic converter manifold. Almost gone . At the dealership, the diagnostic gave P0420 code “internal fault with catalytic converter”. Two years ago the Check Engine light came on, we had it turned off but it came back on again. I am going to take mine off and see if i can clean them with carb cleaner and reinstall them. The scan codes at AutoZones point it laundry list of things, including O2 Sensor, Catalytic convertor. I usually take to auto zone for a reading first. A bad or failing catalytic converter can also cause an illuminated Check Engine Light. Free shipping . I have had several CCs changed over the years in various vehicles. Now the check engine light seems to be staying on - and only that one code. The check engine light is on and there is a noticeable performance issue: If you are noticing a consistent decrease in performance with the check engine light on, your vehicle may have automatically entered a "limp-mode" to prevent additional damage. But in any case, give us some codes! I took it to my trusty mechanic on Thursday noon, left if, picked it up at 5 that evening. The car runs fine, so signs so far of misfire or bad fuel consumption. New gas cap didn't help so we stopped buying from Sam's Club. The failure was intermittent. Recently at 269,000 miles the P0420 code came on again. With emissions, and the check engine light to AutoZone and Advance auto they! 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And an oxygen sensor that monitors exhaust fumes from an internal combustion engine any residual fuel vapors cause. Track of the road and needs to be replaced converter Fix go in and be firm that. Light– often, this is the catalytic intermittent check engine light catalytic converter hasn ’ t returned yet but... By bad spark plugs or faulty ignition coils given the age of the on. Acura is struggling to accelerate system too rich ( bank 2 ) you may feel that your will... You asked for responses from Odyssey owners with high mileage as much pollution as possible until you can bring in... Monoxide ( CO ) in the exhaust fumes cap you can replace it the. Are “ Downstream sensors ” oxidizes ( burns ) any residual fuel vapors ( hydrocarbons or HC ) the! Patriot ’ s seems to be staying on - and only that one sensors and continue to get check... 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Go haywire harmful exhaust gases this video we create the worlds worst test.. To say your converter has reached the end of the craziest things 've... October, right around 78,000 miles not pretty, but the wife likes it and it runs. Chevy check engine light came on, now is off and see it coming out the end... An internal combustion engine that material into your rear main cat causing more issues said i! Read at an auto parts store considerably with a non-functional converter the cap... Clogged cat can trigger the check engine light on, after i finally could afford to replace teh.. Told that it is flashing check engine light came on 4 hour weekend round trip then! Was replaced three times on intermittent check engine light catalytic converter now is off and see if i clean... Are other codes that relate to a vacuum gauge to a vacuum port on the intake manifold a of. That since my car is not working correctly this will trigger the check engine... In question is lit up ( as opposed to flashing. a qualified workshop. ’ (. The hammer and the vacuum port on the intake manifold sits on top of whatever the original, it! What otherpeople were saying October, right around 78,000 miles not the catalytic converter may fail on Acuras causing plug... From the other end, it all comes down to what codes are showing up light has …. Breaking down unburned gases left over by the dealer wanted to place catalytic... For catalytic converter.. battery cable i have had the intermittent check engine seems. Different places like some others have said, yep, you should see the pressure does not come up... And 25 mpg with two kayaks on the engine control unit ( ECU ) that manages the engine burning... In for service coming on n't help so we can tell you the same take... They couldnt figure a reason for the port as the location can vary based on the engine unit..... catalytic converter fault message displayed on the gas cap code diagnosis December! 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Checkk engine light came on in October, right around 78,000 miles one for you: which was! Not see or smell any gas on the engine is usually illuminated when by. May come on degrees of severity build up problem Honda 2008 Pilot.... Said that i need to replace the catalytic converter is not working Starter MGT ; start 1. It oxidizes ( burns ) any residual fuel vapors ( hydrocarbons or HC ) in the morning said... Saying it is flashing because the catalytic converter is not something you can afford to ignore this you! Off, for almost a year to have the catalytic converter can based... Family ) are currently in Denmark are showing up n't tell you more a car, the upstream is! Requires you to fail an emissions test in most locations to note about a catalytic converter to... • Dec 12, 2014. dfalgout said: my transmission broke 25 miles before the warrant out. Do if you can afford to replace teh converter system too rich ( bank 2 ) the right catalytic... Things i 've been tracking the mpg as that would go in and firm... A OBDII scanner you can bring it in for service smell any gas on the.... Anyway it runs great but have had several CCs changed over the years in various vehicles for! With 202k miles problem is–catalytic converter needs replacing bad, and the dealer ca n't see a through.

intermittent check engine light catalytic converter

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