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#1
02-21-2005, 12:31 PM
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93-Check engine code 25
After I drive my 93 LS for ten or so minutes, the check engine light comes on. I checked the code, and it is 25. The only explaination I could find online was "IAT Circiut (I'm assuming that means Intake Air Temp.), temperature out of range. Temp excessive causing a misread by the PCM." What is a PCM? I have noticed that the engine hasn't warmed over the 1/4 mark since it began happening although after a few minutes it usually heats to the midway mark on the temperature gage. What can I do to fix this myself?
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#2
02-21-2005, 11:43 PM
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Re: 93-Check engine code 25
PCM = powertrain control module, the car's computer.
this code is most of the time caused by a bad connection to the IAT, check it, it is a two-wire sensor near the air filter box. the temp gauge problem may be a bad thermostat or ECT(engine coolent temp sensor)
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#3
02-22-2005, 10:13 AM
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Re: Re: 93-Check engine code 25
Thank you so much! I'll check that today!
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#4
02-23-2005, 12:19 PM
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Re: Re: 93-Check engine code 25
Sorry to bother you about this again, but I told my husband what you told me to check. He said he would, but he has no idea where the air filter is either. I tried to search online but I can't find any pictures. Could you let me know where to look for the filter or more information? Thanks so much,
Ashley
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#5
02-23-2005, 10:24 PM
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Re: 93-Check engine code 25
if you have a SL or SL1 with a SOHC engine, the airfilter box is between the engine and firewall, and the IAT is somewhere in the tube supplying air from the front of the vehicle.
if you have a SL2 with the DOHC engine the air filter box is between the driver side headlight and battery. the IAT is a few inches to your left, the car's right, in the tube supplying air from behind the other headlight.
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