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2009 Crown Vic P71 troubles!


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brooks1990
New User

Aug 16, 2011, 10:00 AM

Post #1 of 3 (2547 views)
2009 Crown Vic P71 troubles! Sign In

2003 CV P71. 4.6 Ford. bought for my son. Ignition won't start it, ran a jumper w/ a button. solved. low beams not working, ran a switch, solved. Engine light now comes on....... Unplugged battery, reconnected, light still on. After it warms up, kind of loses power, surging if you will. It seems to me it is the coils. My son washed it, and it was missing on one cylinder. talked to the neighbor, said water must be gathered down the boot hole under the coil. Yup, blew the water out of the last cylinder in the back on the driver's side, fixed. Please help, I don't know what is making the engine light come on. The horn fuse is missing, could this do it? Thx in advance

Mark B/ Spokane Washington


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 16, 2011, 11:15 AM

Post #2 of 3 (2541 views)
Re: 2009 Crown Vic P71 troubles! Sign In

 The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.

Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



brooks1990
New User

Aug 16, 2011, 5:05 PM

Post #3 of 3 (2530 views)
Re: 2009 Crown Vic P71 troubles! Sign In

Thank you. I did call and they do the code reading. It is a 2003, not 09. Thx so much!! I will let you know how it went. Mark B






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