P1444

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE.

P1444

Fault symptoms

•	CHECK ENGINE.

On-Board Diagnostics

Type of diagnosis:

-	Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria

-	General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -7°C.

-	Engine running. Main relay voltage exceeding 10V. Output not active.

Fault criteria

-	Voltage below 2V for 1 s.

Dependents

-

None

System reaction to a fault

-	Fuel adaptation and purging are blocked.

OK report

-	Enable criteria fulfilled. Fault criteria not fulfilled within 60 s.

Fault handling: (For more information, see Fault handling III, other emission-related components and functions .)

Diagnostic help

Fault diagnosis concerns an electrical fault in the connecting leads or in the valve.

Functions in the diagnostic tool related to the fault:

•	Activate valve output.

For more information, see Menu "Activate" .

Checking the wiring

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.