check engine codes
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Senior User
Joined: Sep 2005
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check engine codes
This is the first time I have checked codes on my truck, so I was looking for a little help on what they mean and some ideas on fixes if anyone can help. The Truck: 1995 F-150 XLT 351 w/ Vortech supercharger E4OD 4x4 supercab.
Codes:
116 - Engine Coolant (ECT) sensor out of range
636 - Transmission Oil Temperature (TOT) sensor out of range
114 - Intake Air Temperature (IAT) sensor out of range
What exactly does "out of range" mean? I can live with the IAT sensor reading high being as my centripetal supercharger doesn't have an intercooler. My trans also has a shift kit, and a real trans oil temp sensor is on my to do list, but if anyone has experience or ideas in this area I would appreciate, thanks.
Codes:
116 - Engine Coolant (ECT) sensor out of range
636 - Transmission Oil Temperature (TOT) sensor out of range
114 - Intake Air Temperature (IAT) sensor out of range
What exactly does "out of range" mean? I can live with the IAT sensor reading high being as my centripetal supercharger doesn't have an intercooler. My trans also has a shift kit, and a real trans oil temp sensor is on my to do list, but if anyone has experience or ideas in this area I would appreciate, thanks.
Junior User
Joined: Jan 2007
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From: Va.Beach
It means it out of range due to the fact that it possibly failed. Most sensors (not all, depending on application) run on omhs or resistance. The resistance in the sensor has failed or increased so much that computer has lost the value it reports back and is unable to see it in its programmed range.
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
If you checked the codes on a cold engine, these will come up. Take the truck for a drive and pull the codes again. If the temp sensors are truly bad, the codes will show up again even when the engine is up to operating temperature.
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Senior User
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These codes were taken in the Key On Engine Off test in which they were stored in the memory, or so I thought? Am I mistaken, or are they supposed to be stored for 40-80 key turns? I had a check engine light come on for a minute or so when I was tooling down the highway with the camper trailer three weeks ago, and thats what has prompted me to check the codes. With this test, are these not the codes stored in the memory? Thanks for the reply, and the info on "out of range."
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Key On Engine Off will output two sets of codes. The first set is what the computer sees actively. Temperature out of range codes will appear here if the engine is cold. Then there is a separator pulse, after which the stored codes are output. These are the ones you are thinking of that are stored in memory. So you're right, but make sure that the memory codes are the ones you are looking at. It would be strange to have all three temperature sensors fail at once.
