Adjust engine timing

is it far out mine wont pass its emission test first time the engine need to be red hot then it passes ok try changing the air filter or just for its m.o.t take the filter out as this will let more air into the engine as far as i know there is no way of adjusting the emissions the ecu does this

P0440 OBD II Trouble Code

The car probably will not pass emissions tests with the engine light on.

I have a 2013 dodge dart 1.4 liter rally have a po626 code on new alternator and battery I check the ground wires seams tight check my fuses i cant find anything and it won’t pass emissions test with the check engine light on

Take it to autozone or another place like it and have them read the codes and tell us what they are.

If egr valve is stuck open can cause raunchy smell from exhaust, hense high readings. usually this causes rough idle though.

What is the reason that it wont pass? High levels of WHAT? What is the year and make and model? Are there any check engine light codes?

Contact the dealer for a possible software update to cure this issue.

The code should mean the memory voltage to the computer has been off at some point in time.
Sometimes it is a blown fuse in the box in the engine compartment. I think its a 10amp fuse but not sure.
Sometimes the code is set if the battery voltage drops below 11 volts such as when the car has been parked for several weeks or months.

Has the battery been disconnected, or has it gone dead? Every time the battery is disconnected, all trouble codes are cleared, the check engine light is turned off, and all system monitors are reset. For the monitors to get back to a 'ready' status, the vehicle needs to go through one or more (sometimes quite a few) drive cycles.
When you go to the emission station, they check for codes, AND also check to see how many of your monitors are in a 'ready' status. (This keeps people from disconnecting the battery, and thus clearing any trouble codes, in order to pass emission tests).
If you have not disconnected your battery for a while, but the monitors are still not showing 'ready', you need to have a qualified shop check out your computer and other electronic systems.

What fault code is being set?