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The Ford F-150's P0012 error code indicates a problem with the camshaft position angle. This error occurs when the car's computer detects that the camshaft isn't moving as it should be. The mechanic will investigate the variable valve timing system, which is regulated by oil control solenoids and camshaft actuators in the F-150. Common reasons for this error include malfunctioning solenoids or actuators, low oil levels, worn timing chains, or stretched tensioners. Signs that this error is present include the "check engine" light coming on, starting difficulties, decreased fuel efficiency, stalling, and engine bay rattling. Fixing this problem can be as easy as adding more oil, or as costly as replacing the timing chain, which can range from $1,100 to $1,500 for the repair in the F-150.
The p0012 code relates to the variable valve timing or variable camshaft timing in the vehicle, which is monitored by the powertrain control module or engine control module.