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Check Engine light

1656 messages,  Last post on Nov 10, 2009 at 6:37 PM

You are in the Maintenance & Repair Forum. Your Host is mr_shiftright

What is this discussion about? Fuel System, Electrical, Engine


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#1597 of 1656
2006 scion xa cel by nomech3
Jun 03, 2008 (5:23 pm)
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My cel came on yesterday.I called the dealer,he said try the gas cap and twenty starts.No change.So am I in for a high dealer bill?
#1598 of 1656
Re: 2006 scion xa cel [nomech3] by Mr_Shiftright HOST
Jun 03, 2008 (6:48 pm)
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Replying to: nomech3 (Jun 03, 2008 5:23 pm)

Well you could have the trouble codes read for free at Autozone, for starters. You need to find out what's wrong before you damage something.
#1599 of 1656
check engine light on 2001 Toyota Sienna LE by charlieswife
Jun 03, 2008 (7:29 pm)
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My check engine light on my 2001 Toyota Sienna LE came on and I brought it to the car shop. They told me it was the catalytic converter. So they fixed it. One week later my check engine light came back on. I went back to the shop and they hooked a computer check thing on my car and said the catalytic converter is not functioning right. So they fixed that again. Now about 2 weeks later the check engine light came on again.
Please, some ideas what else could be wrong, even when the code for the catalytic converter comes on. They fixed it twice already!!
#1600 of 1656
Re: check engine light on 2001 Toyota Sienna LE [charlieswife] by Mr_Shiftright HOST
Jun 03, 2008 (7:33 pm)
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Replying to: charlieswife (Jun 03, 2008 7:29 pm)

What comes to my mind (as an armchair quarterback who's not in the game) is that they are curing the symptom but not the disease. In other words: troublecodes do not tell you which component to replace. No car computer on earth is that smart, that it can positively identify the EXACT cause of your problems.
 
So the data (codes) need to be interpreted correctly. In this case, something must be making the catalytic very unhappy, some rich fuel mixture, etc.
#1601 of 1656
Re: check engine light on 2001 Toyota Sienna LE [Mr_Shiftright] by charlieswife
Jun 03, 2008 (7:39 pm)
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Replying to: Mr_Shiftright (Jun 03, 2008 7:33 pm)

What do you mean with rich fuel mixture? I am sorry I don't get it. I am originally from Germany and my husband is currently serving in Iraq and I am kind of overwhelmed with my car situation.
#1602 of 1656
Re: check engine light on 2001 Toyota Sienna LE [charlieswife] by fordfan_17
Jun 04, 2008 (8:00 am)
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Replying to: charlieswife (Jun 03, 2008 7:39 pm)

what mr_shiftright is saying is the computer on the car is coming up with catalyst efficiancy codes due to some other reason. ie: oxygen sensors not functioning correctly. or some other fuel delivery problem with the vehicle. it will have to be diagnosed a little more to find the cause of the problem.
#1603 of 1656
Re: check engine light on 2001 Toyota Sienna LE [fordfan_17] by Mr_Shiftright HOST
Jun 04, 2008 (10:19 am)
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Replying to: fordfan_17 (Jun 04, 2008 8:00 am)

Yes exactly thank you. If the vehicle is getting too much fuel (more than it needs) because some sensor or device is sending the computer wrong information, the catalytic converter, which is supposed to clean the exhaust leaving the engine, will find too much unburned gasoline in the exhaust, and will send distress signals.
 
So perhaps your mechanics are reading the catalytic's distress signals, but have not found the reason why the catalytic is so overloaded with work.
#1604 of 1656
VW Beetle 99 4 clynder by melly_mel20
Jun 09, 2008 (2:46 pm)
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My check engine light was on, test it said it was running too rich. Auto Zone told me to change the spark plugs. I changed the spark plugs, oil and air filter on my Beetle yesterday.
 
Now, my car is super choppy when I accelerate and the check engine light starts to flash after driving it for a few minutes. Any advice?
#1605 of 1656
Re: VW Beetle 99 4 clynder [melly_mel20] by 0patience
Jun 10, 2008 (4:58 pm)
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Replying to: melly_mel20 (Jun 09, 2008 2:46 pm)

You need to have it scanned for trouble codes and let us know what the code numbers are. More than likely, the trouble codes are P0300-P0306.
 
Also, the spark plugs. Were they the exact same ones as you took out?
If not, then that is half your problem.
Most newer vehicles don't like different brand spark plugs and VW and Honda really don't like different brands.
 
Who replaced the spark plugs?
Are they sure they got the plug wires on properly?
 
Lastly. NEVER, EVER, EVER listen to a parts person.
They are NOT mechanics.
#1606 of 1656
Re: check engine light 2002 rsx [tonid] by dakine4
Jul 17, 2008 (2:06 am)
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Replying to: tonid (Mar 18, 2007 11:34 am)

I bought a used rsx.After 200 mi. the maint req lite came on .Is there a way" I "
can reset it without taking it to the dealer?

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