P0442 p0456 p0440 dodge durango engine codes my girlfriend was driving and diddnt put oil n there 4 a while and the engine cutt off and locked...wat should i do?

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

P0440 - Evaporative Emission Control System Malfunction

This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. 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 P0440 could mean one or more of the following has happened:
* The gas cap is not installed or working properly
* The purge solenoid has failed
* The canister is plugged and not working properly

Possible Solutions: With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
* Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
* Inspect the EVAP system for cuts/holes in tubes/hoses
* Inspect for damaged or disconnected hoses around the Evap purge solenoid
* Check and/or replace the sensor
* Check and/or replace the purge valve
* Have a professional use a smoke machine to detect leaks

Other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

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P0456....Evaporative Emission Control System Leak Detected (very small leak)

P0440....Evaporative Emission Control System

p0456
Evaporative emission (EVAP) control system leak detected (very small leak)
p0440
Evaporative emission control system malfunction

Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:

• A small leak in any of the EVAP hoses or fuel tank hoses
• A small leak in the purge valve or vent valve
• The EVAP Canister may be leaking

p0440-Evaporator Emissions Control Malfunction. P0522- Engine Oil pressure low. Replace the Gas cap and double check your engine oil level to make sure your not low. Reset the computer and see if the codes return. If your oil level is good when you check it you may have a problem with your oil pump.

It is possible that there are other causes, but if you just want to replace the output speed sensor:

it should be easy enough to find. it will be along the tail shaft pointing perpendicular to the drive shaft. It will have two wires for a harness. simply unplug the sensor, put a drop pan under it in case some fluid drops out. then just wrench it out, install the new one and hook everything back up. check fluid level if applicable... good luck

replace your evap solenoid this should fix it.

hello po442 ,po455,po456 is leak detected possible, check the gas cap , basicaly you have a leak that is larger than 0.020' and smaller than 0.040' in the gas evaporative system use your nose to find this one thanks

TRY REPLACING THE GAS CAP IF THE SEAL AROUND IT IS NOT SEALING IT CAN CAUSE THIS