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These engines are notorious for phasers and VCT solenoids sticking from oil feed problems to the cylinder heads. Cam sensor codes do not mean the sensors are bad. Not all VCT issues will set cam codes, so you might or might not have them stored in the PCM. They can be set by any timing drive component that is making the valve timing incorrect due to over retarded or over advanced cam timing due to a sticking or inoperative phaser/VCT. 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.
Here are some pictures of failed cam and caps:
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I agree bad engine. You need an oil pressure gauge, most auto parts stores will loan or rent them for a small fee. You remove the oil sending unit near the oil filter and install the gauge in its place. The engine must be fully hot and have the engine in gear at idle with the A/C and all accessories off. Needs to be over 25 psi and steady.