2005 Kia Amanti Code P0401.

PRESSLAND

MEMBER
2005 KIA AMANTI
3.5L
V6
FWD
AUTOMATIC
147,000 MILES

2005 Kia Amanti. I had codes P0401, P0174 and P0171. I did change mass Air flow sensor, Egr vacuum switch, Egr valve, clean the egr tube, put new egr hoses, change Map sensor, change timing belt, water pump and so on.I did spend a lot of money.

I need HELP. ! After I did all that.I did clear the codes. Hard to start /crank. After start. The car drives the same like when I started the problems. Nothing change. When engine runs and I stop the car wants to move/go and the engine runs with rough idle, misfiring, hesitation, lack of power and sometimes stalling.

The code came again but just one, P0401. Can you tell me how to fix it or what do you think is the problem?Any professional suggestion or answer? We did try everything.

Thank you,
Takis

5 Replies

HMAC300

MECHANIC
48,601 POSTS

Check fuel pressure with a gauge sounds low autparts rent it

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Friday, August 22nd, 2014 AT 9:26 AM

PRESSLAND

MEMBER
15 POSTS

I did change the fuel pump, fuel filter last year.
I will check the fuel pressure.
Why it gives me P0401 code for EGR problem?
Thank you,
Takis

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Friday, August 22nd, 2014 AT 12:32 PM

HMAC300

MECHANIC
48,601 POSTS

Do this test of egr in pic. It cold be a plugged egr port though

Image (Click to make bigger)

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Friday, August 22nd, 2014 AT 12:57 PM

PRESSLAND

MEMBER
15 POSTS

Thank you for your respond.
It's so annoying.
Everything looks good.
Still code P0401.
I did fuel pressure w/50 which that's what supposed to be.
I don't know what else to check.
Please let me know if you have any other ideas.
How can I check if the ECM /PCM it's bad?
Thank you

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Monday, August 25th, 2014 AT 2:57 PM

HMAC300

MECHANIC
48,601 POSTS

If yo had a scanner pro style you could activate the solenoid to see if it' sworking if it si then it may lead ot a bad pcm or a poor connection at either end. A pro shold really check for that though.