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6Bucs, Ford Senior Master
Category: Ford
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Experience:  Ford senior master tech, 18 years experience.
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07 F250 5.4 code PO022

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07 F250 5.4 code PO022

Hello and welcome to Just Answer. My name is james.

VCT performance codes for sticking cam phasers often lead to phaser replacement, however the root cause is often ignored, so the problem returns. This code is rarely resolved with replacement of the solenoid.


Many times the code is accompanied by phaser ticking, or valve train clattering noise.


These engines are notorious for phasers and VCT solenoids sticking from oil feed problems to the cylinder heads. The bad or sticking phaser or VCT solenoid is usually the result of the problem not the root cause. Here is a list of what I check or replace on these every time I get one in with phaser noise, VCT codes, cam sensor codes or misfires caused by VCT issues. Before any disassembly the PCM data pids for VCT error correction should be monitored to confirm it is a VCT issue. If the vehicle won't run, a compression test can also verify the VCT problem.


  • Oil Pressure. Any thing under 25 at idle will cause phaser issues. Oil pressure needs to be steady and not fluctuating. If low or fluctuating suspect crankshaft thrust bearing wear. This can be verified by a simple end play check. Also if engine is sludged in the least amount there could be oil starvation to the valve train which is also very common on these and can be verified by pulling a few cam caps on each side, it will be obvious if the there is an oil supply issue to the valve train by the condition of the caps and journals.

  • VCT valve body/solenoids. Have seen many issues with solenoid plungers sticking and restrictions in valve body due to plugged or collapsed screens.
  • Timing chain tensioner gaskets blown. This will cause oil pressure bleed to the valve train and affect phaser functionality.
  • Camshaft phasers sticking due to contamination or low oil volume/delivery pressure.
  • Crankshaft endplay, I don't bother fixing the engine if endplay is over .010
  • Oil pump, I change if there was any evidence of sludge or varnishing. There are passages in the pump that clog and can cause oil starvation problems.

In short if I don't find oil pressure concerns and my cams are in good shape I usually replace the phasers, VCT bodies, oil pump and tensioners on every one of these. Ford has updated these part numbers several times with improved engineering designs.



If the noise is a pronounced tick, not a rattle then you could also have a roller follower that is seized. This would need to be pinpointed to which side of the engine then the valve cover removed to inspect the followers.


Customer: replied 5 years ago.
Is that code saying the problem is on the pass. Side or driver side , I just built the engine and replaced the fazor on the driver side and the camshaft on the pass. Side. It is idling about 400 rpm's and will die when you give it gas and let off it.
Yes, this certainly sounds like a sticking phaser.
Code P0022 is for bank 2...the driver's side.
Restriction in the oil passage through the camshaft/journals will cause this, as will a failed o ring on the chain tensioner on the affected bank.
Customer: replied 5 years ago.
Ok, that's the side I put the new fazor on so do you think maybe I need to tear it back down and replace the chain tentioner
Customer: replied 5 years ago.
I'm not sure if my last message went thru but anyway , that's the side that I put the new fazor on so do you think I need to tear it back down and replace the chain tensioner.
If the tensioner was not replaced during the rebuild, yes. The tensioners are one time use. Remove a couple of the camshaft caps, one in the back, one in the middle, possibly the front one to check for any scoring, or debris caught in the oil passages. Carbon and deteriorated aftermarket oil filters clog the passages quite often. If you do have the front cover off again, blow compressed air through the oil passage at the front and rear cam journals, and through the oil feed behind the chain tensioner to make sure there is no blockage there.
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