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is the check engine light on is so have code read 1st-second try cleaning the throttle body where air goes into the engine where the rubber hose attaches clean with a throttle cleaner wipe cleaner out i say this due to the idle air control motor may be dirty,and last you may have a faulty egr valve
P1405 is an EGR code this can be caused by a bad EGR valve and vaccum selonoid and or a bad DPFE sensor and blocked or melted hoses going to the DPFE.I usally remove the EGR Valve and using a hand held vaccum pump ck the Valve to see if it opens correctly if it is then ck the DPFE hoses if they are ok . Now if the EGR valve is bad You need to replace the DPFE and the Selonoid and the valve because the Valve not working burns them up internally. If the Valve is good first replace the selonoid ... its the cheapiest .... if that doesn't fix it replace the DPFE and the hoses going to it . If you know some one with a good Scan tool it may have a EGR self test prcedure built in like mine does and makes this easier but if not i have told you how with out a scanner
code p1400 is a DPF EGR sensor CIRCUIT LOW VOLTAGE detected. most likely is a problem with the wiring to the egr or dpfe sensor. the pinpoint tests for code p1400 instruct you to test all wiring before replaceing the egr or dpfe sensor
A very common issue that can cause this code is the EGR valve but most commonly the DPFE Sensor differential pressure feedback egr. For the evap code would make sure no lines may have been disconnected while replacing the egr valve. It is possible the the evap code may be a separate issue.
did you try cleaning the idle control valve and the egr valve out with carb cleaner.try that before replacing any parts,also if there is any codes in the system those should also lead you in the right direction.
the ck eng light is displayed because ther is an issue with a computer controlled component such as eng sensors or egr system.it will have to be scanned to see what part is failing then repaird as needed.it will also have to have the codes that are stored cleared with a scan tool.before test drive to see if repairs are done proper.