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My 2008 FJ is throwing this code camshaft position "A' is over-retarded it runs fine any suggestions
 

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Re: code P0012

My 2008 FJ is throwing this code camshaft position "A' is over-retarded it runs fine any suggestions
There is a tremendous amount of information on this forum on "stretched timing chains", and codes P0011 through P0025 relating to problems with the variable valve timing system.

1st, remove, clean, inspect, and test the Bank-1 oil control valve and its related oil strainer, and possibly swap the oil control valve with the Bank-2 unit to see if the failure follows the valve. You might get lucky and find that the retarded timing is due to a sticky or oil-starved oil-control valve.

2nd, if no problem is found with the oil control valve, remove the cover plate on the front of the timing chain cover and see how far the plunger on the cam chain tensioner is extended. A near fully-extended plunger means the cam chain guides or the cam chain itself is seriously worn.

You didn't mention the odometer reading, or if you know anything about the engine's oil change history, but unfortunately the P0012 code indicates there is a good chance that your primary timing chain is worn out, and the accumulated clearances between each link are causing the Bank-1 cam timing to be "retarded" relative to the crankshaft position. The Bank-1 cam position sensor is the furthest from the crankshaft sprocket, and thereby has the greatest length of chain involved, and will show the effects of a worn chain before the Bank-2 sensor will. If the timing chain is worn out, the only option is to replace all three of the timing chains and all the other related components: chain guides, chain tensioner, etc.
 
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