What is the trouble code p1684, and p0455.

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

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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 ...
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Oct 21, 2020

Chrysler, Dodge, and Jeep Computer Error Codes - Allpar

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A code P1684 shows that the memory has been cleared recently and is not ... P0122Throttle Position Sensor Circuit Low Voltage; P0123 Throttle Position Sensor ... 2Circuit High Voltage; P0189 Fuel Temperature Sensor 2 Circuit Intermittent ...

Running rough, lots o' codes - The Chrysler Minivan Fan Club Forums

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Jun 4, 2010 - 10 posts - ‎4 authors
Sent lots of codes: P1684, P0122, P0118, P0106, P206, P1478, P1598. Can't find anything on the last two, but looks like an electrical prob ...

Dodge Caravan 2003 P1684 P0442 P0455 P0456 - OBD-Codes.com

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Jun 10, 2012 - Your OBD-II Trouble Codes Repair Site. Menu. Home · Trouble Codes... At first it was just the battery code P1684 and the small evap code P0442. Now the other two codes are showing as well. What are the chances that this ...

10127316 WHAT DOES P0122 CODE MEAN? - Download

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

yes. the rubber gaskets do wear out. on most vehicles the gas cap
should be tightened 'til it"clicks". you probably can't tell from the
"appearance" but if you tighten 'til it clicks then drive for awshile and still
get the same code, the next step is a NEW gas cap/

you can look up these codes on actron.com or google that code

this obd2 trouble code table can help you understand the meaning of code.
and for p0455, you can try:

Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.

Otherwise, replace the gas cap, and/or

Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary

P1684 - Battery Disconnected Within Last 50 Starts

P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)
This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Symptoms: You likely won't notice any drivability problems.

Causes: A code p0455 most likely means one or more of the following has happened:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
Other leak or damaged piece in EVAP system

Possible Solutions: With a p0455, the most common repair is to:
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary


Test and check it. Hope this helps.

Trouble code P1684 means: The battery has been disconnected within the last 50 starts . and p0455 is evaporative emission control system,( large leak )-- how to fix--try by either loosening gas cap or tightening it to see if this is where the leak is! most of the time it is the cap..

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

P0442, P0455 AND P0456 are all evaporative leak monitor test failures (small, medium and large leaks). These codes appear anytime the integrity of the air space above the fuel or the lines to/from the vapor canister or purge valve. If there is no damage to the canister, check the lines that run under the van from the fuel tank and canister to the purge valve (under the hood). Also, check to make sure that the hoses are not split or disconnected where they connect to the purge valve. The P1684 is abit more confusing. This is not a valid DTC for your vehicle. It's possible the scanner the shop you went to is an OTC scanner that is reporting a false code. It's also possible they wrote it down incorrectly. The closest thing that makes any sense is a P1486 which would indicate a pinched hose in the same monitor system as the other 3 codes. Best of luck!