Service emission sys warning message on ford scape 2005

P0455- Evap Emission Ctrl Sys Gross Leak Detected
P0496 Evaporative Emission Sys High Purge Flow
This is the 2 codes you requested and they say you have a leak in the emission sys.

Warning Messages The warning messages can interrupt the display until cleared or reset by the driver. The warning messages are either single cycle, non-resettable, or repetitive warning messages.
The single cycle warning messages display once whenever the ignition switch is turned to the ON position or a fault occurs in a system, and can be cleared by pressing the RESET button. The single cycle warning messages are:

• liftgate ajar
• liftgate glass ajar
• service emission system
• low brake fluid
• service brake system
• check left headlamp
• check right headlamp
• check left turn lamps
• check right turn lamps
• check left high beam
• check right high beam
• check brake lamps
• check parking lamps
• washer fluid low
• check fuel cap
• change oil soon
• change oil now
• low fuel
• service 4x4
• turn signal on

It's a generic message telling you that it's time to "service" the emission system.

Injector Cleaner is not in any owners manual

It is a few onces in many gallons of gas & does nothing

Check for codes & have the car diagnosed --as with any and
all issue from the past on any vehicle

If you over fill it you can get fuel into the evap canister

VOTE FOR ME INFORM ME OF YOUR PROGRESS
P0450 Evap Emission Ctrl Sys Pres Sensor Error
P0451- Evap Emission Ctrl Sys Pres Sensor Range/Perf
P0452- Evap Emission Ctrl Sys Pres Sensor Lo Input
P0453- Evap Emission Ctrl Sys Pres Sensor Hi Input
P0454 Evap Emission Ctrl Sys Pres Sensor Interm
P0455- Evap Emission Ctrl Sys Gross Leak Detected
P0456- Evap Emission Ctrl Sys Very Small LeakDetected)
P0457 Evap Emission Ctrl Sys Leak (fuel cap loose/off)
P0458 Evaporative Emission Sys Purge Ctrl Valve Circ Low
P0459 Evaporative Emission Sys Purge Ctrl Valve CircHigh
P0460- Fuel Tank Level Indicator Circ Error
P0461- Fuel Level Sensor Circ Range/Per

P2408 Fuel Cap Sensor/Switch Circ
P2409 Fuel Cap Sensor/Switch Circ Range/Perf
P2410 Fuel Cap Sensor/Switch Circ Low
P2411 Fuel Cap Sensor/Switch Circ High
P2412 Fuel Cap Sensor/Switch Circ Interm/Erratic

the meanning of P1451 is Evap Emission Control Sys Vent Control Valve Circuit

OBD2 code reader

It simply means that its time for routing service and maintenance on your car. This will normally be reset when you take it in for an oil change. 1. Ford has issued a Special Service Message (SSM), stating that the owner's manual procedure is incorrect, and giving a revised procedure. The following is the text of the SSM:

18562 2005 FREESTYLE/FIVE HUNDRED/MONTEGO - OIL LIFE RESET PROCEDURE
THE 2005 FREESTYLE, FIVE HUNDRED, AND MONTEGO VEHICLE OWNER'S GUIDE OIL LIFE RESET PROCEDURE IS INCORRECT. TO RESET OIL LIFE ON VEHICLES WITHOUT MESSAGE CENTER, USE THE TRIP/RESET BUTTON TO TOGGLE THE ODOMETER DISPLAY TO 'OIL LIFE XX%'. THEN PRESS AND HOLD THE BUTTON FOR 10 SECONDS TO RESET TO 100%. THE INSTRUMENT CLUSTER WILL BEEP WHEN THE OIL LIFE IS RESET.
FOR VEHICLES WITH A MESSAGE CENTER, PRESS 'SETUP' TO DISPLAY 'PRESS RESET FOR SYS CHECK'. PRESS AND RELEASE 'RESET' TO START SYSTEM CHECK. WHILE 'OIL LIFE XX%' IS DISPLAYED, PRESS AND HOLD 'RESET' UNTIL 'IF NEW OIL HOLD RESET' IS DISPLAYED, THEN RELEASE. PRESS AND HOLD 'RESET' AGAIN UNTIL 'OIL LIFE SET TO 100%' IS DISPLAYED. THE INSTRUMENT CLUSTER WILL BEEP WHEN THE OIL LIFE IS RESET.
EFFECTIVE DATE: 04/20/2005

it can wait but you better check and see whats wrong. Good luck

it means that something is faulty in the emissions control , have the vehicle scanned by a reputable tech

To know what it exactly is, you need a code scanner hooked to it.
If there is an autozone near you, go there, tell them the engine light is on and you need the code, takes about 30 seconds. They don't charge, where other places do. Without that code you'll be replacing things you don't need to. There is other sensors in the emission system other than the 02 sensors.