Check engine light
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Senior User
Joined: Sep 2010
Posts: 495
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From: Florida
Check engine light
i dont know why the check engine light is on what should i look for?
Here is my story the light just came on afer we were driving home from A/C shop they had replaced the drier and compressor, as we were going
home our A/c was working fine for half of the ride,the system started just blowing warm air instad of cold air, got home looked at dash and check engine light was on,and it wasnt on when we dropped it off at shop,
popped the hood ,and whole ac system was hot, all the pipes and componets were hot ,to the touch and thats it, dont know what i am looking for, dont even know if it the ac causing the check engine light to be on.So any advice,tip, commet anything?
f-350 7.3L (NON-turbo)
dually Xlt lariet
2wd
automatic c6
Here is my story the light just came on afer we were driving home from A/C shop they had replaced the drier and compressor, as we were going
home our A/c was working fine for half of the ride,the system started just blowing warm air instad of cold air, got home looked at dash and check engine light was on,and it wasnt on when we dropped it off at shop,
popped the hood ,and whole ac system was hot, all the pipes and componets were hot ,to the touch and thats it, dont know what i am looking for, dont even know if it the ac causing the check engine light to be on.So any advice,tip, commet anything?
f-350 7.3L (NON-turbo)
dually Xlt lariet
2wd
automatic c6
Lead Driver
Joined: Mar 2006
Posts: 5,098
Likes: 1,504
From: western SD
What was the temp gauge reading? The red engine light will come on if the temp gets into the hot range. A bad sensor in the drivers side head can do this, as it overrides the temp gauge, pegging it to the hot side and turning the on. Are the belts all on? The AC quitting and the engine light on sounds like the belts came off thus the fan quit turning.
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
Sometimes one belt is enough to take the rest off but you would also notice the loss of power steering and power brakes if that were to happen. Serp belts came in 1992 fyi.
Depending on how hot the AC components got, I wonder if some of the electrical got damaged nearby. Are any of the gauges reading off?
What year is the truck?
....and I think its VERY unlikely you need a new oil pump. I suspect this is an electrical issue.
Depending on how hot the AC components got, I wonder if some of the electrical got damaged nearby. Are any of the gauges reading off?
What year is the truck?
....and I think its VERY unlikely you need a new oil pump. I suspect this is an electrical issue.
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