P0344: Unexpected intake cam events can trigger an intermittent circuit result

Ford identifies P0344 as intermittent bank 1 intake cam-position circuit behavior. The cited monitor evaluates cam events against engine-position events, so an event arriving in an unexpected location can matter even when the signal is not completely missing.

Compare event relationships

The source describes a ratio of engine-position events to cam events that depends on cylinder count. It separately identifies an intermittent cam signal by an unexpected event position. A simple pulse-count check therefore does not capture every way this monitor can fail.

Preserve the relationship between crank-derived events and the intake cam signal during the fault. The document lists continuous monitoring, an entry speed of 200 rpm and a duration below five seconds, but it does not provide a universal waveform or tooth arrangement.

Keep circuit intermittency separate from commanded timing

P0344 is in the cam signal check, whereas variable cam timing target errors are described elsewhere. The intermittent code does not establish that a phaser failed to follow a command or that a timing chain has moved by a particular amount.

Use the full code and correct bank/cam identity before applying the engine-specific circuit procedure. A plausible cam angle shown after the event does not prove the earlier signal relationship was valid. Verification should demonstrate consistent event placement while the monitor runs. The source alone cannot distinguish an internal sensor problem from circuit, target or other engine-specific causes.

Source and applicability

This explanation covers the cited Ford monitor variants, not every vehicle displaying this code. Match the engine, sensor architecture and calibration before applying numerical limits.

Ford OBD summary, PDF page 132.