2004 f350 5.4l triton, p0356 only below 20 deg f.
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2004 f350 5.4l triton, p0356 only below 20 deg f.
Could an intake manifold leak cause a p0356 code? Only happens below 20 degrees f. New sparkplug, New coil packs, have not hound evidence of a bad harness plug. Seems on some motors a vacuum leak can cause this code. At first drenching the coil packs and harness with silicone spray seemed to help but not so much now. Could the spray have affected a intake manafold leak? Any help much appreciated. TIA
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Joined: Jan 2004
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From: St Louis
A P035x DTC indicates an electrical circuit fault, in your case #6. Vacuum leaks would not be expected to cause this concern at all.
It's probably a circuit connection that gets cold and shrinks (everything shrinks in the cold, you know...) causing an open electrical circuit. Most likely suspect is the COP's connector.
It's probably a circuit connection that gets cold and shrinks (everything shrinks in the cold, you know...) causing an open electrical circuit. Most likely suspect is the COP's connector.
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