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#1
12-22-2003, 09:36 AM
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'Service Engine soon' Light - codes included here
Hello Everybody !
Hope that someone here can help me. My 'Service Engine Soon' light came on again. A month ago the code was saying that Mass Air Flow sensor was the culprict. Our automotive department college technician checked it out and dissable the light on my request. A week ago the light came back. I took the car again to the same technician ansd he was able to (with his hand held diagnostic computer code reader) pinpoint the cause. This time the instrument read two codes: Code PO 133 and Code P 1133 (Oxygen sensor) There was also indication stated HO2S. Now, what it is going to cost me at the dealer to fix it? Is this something that affects negatively the performance, fuel consumption etc? Can I drive the car as it is, can I ignore the light? I put a black tape over the light so it will not shine right in my eyes while driving. Just wonder whether by ignoring this I can face some more serious troubles down the road. I know that we have a couple of experts here at this forum and wonder whether they could put some 'more light' unto this and advice me what to do. Best Christmas wishes to everybody Peter Solarik 
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#2
12-26-2003, 04:40 PM
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Re: 'Service Engine soon' Light - codes included here
You should never ignore a check engine light! Your oxygen sensors measure the unburned fuel in your exhaust. Measuring this unburned fuel allows the computer to adjust the air/fuel ratio to keep the best fuel mileage and least pollution output.
90% of the time all you need is a new O2 sensor installed which will fix your problem. You can drive the car without fixing it but you will end up causing more problems in the long run. Your friendly Czech moderator!
__________________
Shop Foreman Buick Pontiac and GMC dealership ASE Master Tech ASE Advanced L1 GM Master tech Licensed Aviation mechanic
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#3
12-30-2003, 10:01 AM
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Re: 'Service Engine soon' Light - codes included here
Note to Flatrater, the O2 sensor reads exhaust oxygen, not HC, which is what unburned fuel is. Though there is a correlation between exhaust oxygen and unburned fuel, the sensor rerads oxygen only. Ray
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#4
12-30-2003, 07:34 PM
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Re: 'Service Engine soon' Light - codes included here
Yes Ray you are right it was one of those things were I was thinking and not typing what I was thinking.
The O2 still uses this info to adjust fuel mixture.
__________________
Shop Foreman Buick Pontiac and GMC dealership ASE Master Tech ASE Advanced L1 GM Master tech Licensed Aviation mechanic
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#5
12-31-2003, 05:22 PM
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Re: 'Service Engine soon' Light - codes included here
I appreciate the messages to individuals considering ignoring ses lights as well. Any time a warning light illuminates, never ignore it. At best, it will lead to confusion on the tech's part when he attempts to diagnose the problem. It can definitely lead to other problems as well. Happy New Year to all. Ray
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