A 2019 Ford F-150 came into the bay with an intermittent rough idle, an active check engine light, and a tendency to die when coming to a stop. The codes pulled were P002164 and P002268, which point directly to a camshaft struggling to control its position.
The technician noted the specific symptoms verbatim, explaining that the truck “idles rough sometimes, check engine light on, sometimes dies when coming to a stop.” When analyzing these inputs, the diagnostic platform we build ranked a stuck or sluggish Bank 2 intake VCT solenoid as the primary suspect at 78 percent probability.
The VCT Solenoid Failure Path
On the 5.0L Ti-VCT V8, the Powertrain Control Module regulates camshaft advance and retard via pulse-width modulated VCT solenoids. These solenoids direct oil pressure into the Bank 2 intake phaser. The concurrent occurrence of P002164 (over-advanced, signal plausibility failure) and P002268 (over-retarded, event information) indicates the intake camshaft is sticking erratically at both ends of travel.
Ford Technical Service Bulletins SSM 49583 and SSM 50067 specifically identify fine particulate contamination and mechanical binding within the VCT solenoid spool valve on these engines. When the solenoid spool hangs open in the advance direction, the camshaft remains advanced. This causes violent idle stumble and engine stalling as the truck slows down to zero, driven by excessive valve overlap. Conversely, when the spool valve sticks in the retard port or fails to advance smoothly under command, P0022 is logged.
The recommended diagnostic path starts with a bi-directional scan tool VCT solenoid cycling test. Following that, live datalogging of the VCT_ADV21, VCT_ADVDSD21, and VCT_ERR21 PIDs will show how the system reacts under load. Technicians should also perform a VCT solenoid coil resistance check, looking for 5.0 to 15.0 ohms at 20 degrees Celsius, and physically inspect the micro-mesh screen for contamination or tearing.
Oil Starvation and Aeration
Our system ranked low, degraded, or incorrect viscosity engine oil as the second most likely cause at 70 percent. The Ford Ti-VCT system relies on clean, aerated-free engine oil pressure to maintain camshaft phaser angles. This specific engine generation is widely recognized for elevated engine oil consumption, addressed in Ford TSB 19-2365. Vehicles frequently operate two to four quarts low before displaying an oil warning lamp.
Low oil volume induces cavitation and severe aeration in the cylinder head oil galleys. Because aerated oil is compressible, the Bank 2 intake phaser cannot maintain hydraulic lock. This allows valve spring torsional forces to whip the camshaft back and forth across its mechanical limits, generating both fault codes. Extended drain intervals also cause sheared viscosity or sludged oil to restrict the micro-mesh inlet screens feeding the VCT solenoid. The first step here is always an engine oil dipstick level inspection and checking the drain oil for debris.
Mechanical Phaser Wear
At a 55 percent probability, internal wear or a broken locking pin in the Bank 2 intake camshaft phaser becomes a major suspect. The phaser uses an internal rotor with hydraulic vanes and a spring-loaded locking pin designed to lock the phaser at the default base park angle during engine cranking and hot idle.
Internal phaser vane seal wear, housing scoring, or fatigue failure of the locking pin allows the phaser to unlock and oscillate uncontrollably under normal valvetrain torsional kickback. Because the phaser rotor is unconstrained, the camshaft flutters between maximum advanced and retarded positions. When decelerating to a stop, the camshaft stays partially advanced instead of parking, killing intake manifold vacuum and causing the engine to stall. A cold-soak startup acoustic evaluation with a stethoscope and a rotational lash test with a camshaft holding tool will confirm this failure.
Timing Chain Slack
The final high-severity cause, ranked at 38 percent, is Bank 2 timing chain slack or a worn hydraulic tensioner. Chain link pivot wear combined with wear on the nylon tensioner guide shoes allows timing chain whip. Under deceleration, torque reversal on the camshaft drives erratic timing variations that cause the camshaft to oscillate past the calibrated timing window.
Testing for this involves a scan tool live comparison of Bank 1 versus Bank 2 camshaft actual positions during a throttle snap, followed by physical measurement of timing chain slack and tensioner piston extension under the valve cover.
Next Steps
Are you seeing this same pattern of dual over-advanced and over-retarded codes on modern 5.0L engines in your bay?
