Engine code p0455? - 2000 Ford Ranger SuperCab

Question edited for clarity. P codes for DTCs must have upper case P.

All questions need FULL 'year make model'.

White smoke is steam, and this is normal at this time of year and is mentioned on this website a LOT at this time of year. Gasoline has weather in it at molecular level and is burned off as steam.

P0300 unknown random misfire
P0303 Misfire on Cylinder 3
P0304 As above on 4

OBD-II Trouble Code - P0455

RepairPal.com https://repairpal.com > obd-ii-code-p0455
OBD-II code P0455 is a problem with an Evaporative Emission Control System Leak. Get expert information on fault code P0455.

P0455 Code: Evaporative Emission Control System Large ...

CarParts.com https://www.carparts.com > ... > OBD-II Trouble Codes
Aug 6, 2023 - Code P0455 is typically triggered when your vehicle's computer detects a large leak in the EVAP system. Symptoms of a P0455 include a lit check ... Videos

2:20
How to Fix P0455 Engine Code in 3 Minutes [2 DIY Methods ...
YouTube · nonda 2 minutes, 20 seconds
Oct 21, 2020

P0455 - large leak - take to a qualified repair shop an have smoke tested .
EVAP Leak Testing P0455 Gross Leak

large evap leak --check gas cap that it is on --look under truck at rear of fuel tank by spare tire and check the evap canister and hoses the following link will assist you
https://www.obd-codes.com/p0455 How to Fix Check Engine Light P0455 Emissions Purge Valve Replacement How to Fix Check Engine Light P0455 Emissions Purge Valve Replacement

Here's a link to your code.maybe try to reinstall the gas cap, http://www.obd-codes.com/p0455

Here's a link to your P0455 code. P0455 OBD II Trouble Code

OBD-II Trouble Code: P0455 Evaporative Emission Control System Leak Detected (no purge flow or large leak)

Most people find it is from the gas filler cap. Here is a page where people discuss the problem and what they did:

http://www.jeepforum.com/forum/f9/engine-code-p0455-1051189/

What code ? P0442 or P0456 or p0455
DTC EVAP P0442 P0455 P0456
EVAP Leaks P0442 and P0455

Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

P0455 EVAP EMISSIONS SYSTEM GROSS LEAK DETECTED.CK GAS CAP.IF IT IS TIGHT U WILL NEED A SMOKE MACHINE TO CK THE SYSTEM FOR LEAKS

P0455 Evaporative Emission Control System Leak Detected (gross leak) - check your entire engine bay contents for any type of leak, air conditioner when it's running, coolant, things like that.

P1684 Battery Disconnected Within Last 50 Starts - this is a code that will go away over time

A little late but check your gas cap first.

http://www.p0455.com