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Old 05-30-2013, 09:37 PM
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Edge CTS with P0652 a mystery?

I have a 08' 6.4L crew cab lariat, auto. S&B intake, dpf delete, and Edge CTS programmer. Ever since I got the programmer and deleted the dpf last summer I've been throwing a P0652 code once or twice a month, this puts the truck into limp mode with a dead pedal. Now it happens as a daily occurance. I can't seem to figure it out. I had my Edge updated, I've cleaned ever ground on the truck, checked all v-ref and sgn/ret splices, checked all v-ref voltages at sensors which I get 4.98-4.99 volts. I've so far installed a new pcm, new dpf pressure sensor, 3 new egts, new accelerator pedal.

Its almost like a short, If I shut the truck off and restart it, its all good to go, then 3 hrs later it happens again, the truck throws a light, high idle goes on and limp mode is back. Shut the truck off and restart it and I'm off to the races again. WTF?

I'm running out of ideas here, could my programmer contain a virus or something like a programming glitch?

anyone ever hear of a issue with Edge programs?

Last edited by merculous; 05-30-2013 at 09:43 PM.
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Old 06-01-2013, 01:08 PM
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Well, any VREF sensor shorting to ground intermittently can cause this.

OR a VREF wire rubbed/shorted somewhere.

Have you called Edge?

I know it's a pain in the ***, but put it back to stock and see if it does it, that will rule out the programmer/tuning.
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Old 06-02-2013, 07:03 PM
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I called edge and got a so called " reset" done on my programmer. I had my programmer plugged into the laptop so he could see the faults online on his computer as we talked on the phone. I told the tech on the phone my issues and he said he see's the code I'm referring to on his screen. Downloaded this reset and I'm so far 3 days in with no issues....... Knock on wood.
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Old 10-23-2013, 12:22 PM
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update......................this problem of dead pedal has been a ongoing issue all spring and summer to the point where I couldn't get 2 miles without the truck going into limp mode. Finally took it into a shop diesel only shop, they tore the wiring apart and tested every wire from the computer which took them hours to diagnose. I had 18 wires with faults on the chassis side connector.

The cab was lifted and the complete wiring harness changed out with a new one. $1400 bucks from ford....Ouch!!!! So far so good though!!!!
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