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Tom Goldman · 11-24-2013, 07:24 PM

Like Tom said , sounds like a blocked cat.
P0700 is a generic transmission code that appears in the ECM when a code is present in the TCM.
Many scanners only read the PCM codes so the only one you see is P0700.
Any trans code will set a PCM code since transmission performance can effect engine load and emissions.

11-24-2013, 07:24 PM	#4
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,476 Likes: 887 Liked 875 Times in 236 Posts	Re: 5.7 hemi runs but no engine vacuum Like Tom said , sounds like a blocked cat. P0700 is a generic transmission code that appears in the ECM when a code is present in the TCM. Many scanners only read the PCM codes so the only one you see is P0700. Any trans code will set a PCM code since transmission performance can effect engine load and emissions. __________________ Tom Goldman 1500 SG , 1506 STK