I have a 97 Mustang GT and on yesterday the "Check Engine Light" came on, and today the car wouldn't idle for like 20 minutes. I took the car to Autozone and I got two codes P1443 & P1507. Can anyone help me with these codes becasue the guy at Autozone did not know the meaning of the codes. Your help would be greatly appreciated.
Help With Computer Codes
- Thread starter PONYEXPRESS97
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MT1083
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P1443 - EVAP emission control system control valve malfunction
P1507 - Idle air control underspeed error
I don't know exactly what these mean, but I can check my Service manual tomorrow if nobody else replies to this before I can get back to you. I should be able to get you an answer.
P1507 - Idle air control underspeed error
I don't know exactly what these mean, but I can check my Service manual tomorrow if nobody else replies to this before I can get back to you. I should be able to get you an answer.
MT1083
New Member
I bought it on ebay by doing a search on "mustang service manual". I just bought the cd for the 2000 mustang. I believe the seller was pcplanit or something like that. Got it for 10 or 12 bucks total. Not bad for everything that is included in it. They are a power seller so they should have a ton of them. 
MT1083
New Member
MT1083
New Member
Ok you have another PM Jorge. Sorry to be using your thread pony but I'll get back to you tomorrow. I probably won't stay on long enought to get any more pm's tonight but I'll get 'em tomorrow.
Sorry to be using your thread pony but I'll get back to you tomorrow. I probably won't stay on long enought to get any more pm's tonight but I'll get 'em tomorrow.
MT1083
New Member
OK here is what I found out:
P1507 - This code is set when the PCM detects that the idle rpm's are under the desired rate. The possible causes are as follows:
IAC circuit open, Air inlet is plugged, damaged IAC solenoid. From what I read, if the resistance of the solenoid is between 6-13 ohms then it is bad. Disconnect the IAC and look for no change in engine rpm as an indication of a damaged or stuck valve.
In regards to your other code...it would take me a year to explain what that thing is. You would either have to buy the same manual that I have or just take it to Ford and have them check it out. From what little I read, it seems like that might get a little complicated. Sorry I couldn't be more help.
P1507 - This code is set when the PCM detects that the idle rpm's are under the desired rate. The possible causes are as follows:
IAC circuit open, Air inlet is plugged, damaged IAC solenoid. From what I read, if the resistance of the solenoid is between 6-13 ohms then it is bad. Disconnect the IAC and look for no change in engine rpm as an indication of a damaged or stuck valve.
In regards to your other code...it would take me a year to explain what that thing is. You would either have to buy the same manual that I have or just take it to Ford and have them check it out. From what little I read, it seems like that might get a little complicated. Sorry I couldn't be more help.
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