2005 mazda 6 p2227 and p2144 what is the most popular part you replace

I did check a solenoid by self is working good and power from main relay good but no signal (ground) front PCM you got that problem on your experience.
QUESTION: some other sensor(boost sensor, EGR solenoid) make the PCM stop to send ground to solenoid... THANKS FOR YOUR HELP..... I did check a solenoid by self is working good and power from main relay good but no signal (ground) front PCM you got that problem on your experience.
QUESTION: some other sensor(boost sensor, EGR solenoid) make the PCM stop to send ground to solenoid... THANKS FOR YOUR HELP.....

2227 code is being stored due to whatever is setting the 2144 code. This code is stored for the following reason. PCM is looking at what the ground side voltage is for the solenoid inside the PCM. When the PCM turns the solenoid off or breaks the ground circuit then voltage at that ground circuit wire (green w/ yellow stripe) should increase to system running voltage or whatever voltage the main relay is outputting. This would be pin 93 at PCM. If your power from main relay is ok (White wire) and relay is working then would suspect a high resistance in the ground side circuit. No specs given for solenoid resistance but would guess between 25-100 ohms. Check continuity of ground path for solenoid between the solenoid and pcm. There is a connector in the middle and not a direct wire between the two. It is a 2 pin short cord that has both the ground and power wires to solenoid in it and has same wire colors as the solenoid valve. Located on the firewall and just to the inside of the brake master cylinder. See what you find there. 2227 code is being stored due to whatever is setting the 2144 code. This code is stored for the following reason. PCM is looking at what the ground side voltage is for the solenoid inside the PCM. When the PCM turns the solenoid off or breaks the ground circuit then voltage at that ground circuit wire (green w/ yellow stripe) should increase to system running voltage or whatever voltage the main relay is outputting. This would be pin 93 at PCM. If your power from main relay is ok (White wire) and relay is working then would suspect a high resistance in the ground side circuit. No specs given for solenoid resistance but would guess between 25-100 ohms. Check continuity of ground path for solenoid between the solenoid and pcm. There is a connector in the middle and not a direct wire between the two. It is a 2 pin short cord that has both the ground and power wires to solenoid in it and has same wire colors as the solenoid valve. Located on the firewall and just to the inside of the brake master cylinder. See what you find there.