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Old 01 May 2018, 12:31 pm
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Location: Juliette ga
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Default 0401 code

I have an 02 nonturbo that I just put a motor in, it is running fine but I was driving it this morning and it threw a 0401 code, it says itís a egr problem, do I need to replace my egr valve to fix this, thabks
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Old 01 May 2018, 02:01 pm
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Location: Darien, IL | Forest Park, IL
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Default Re: 0401 code

you do not need to replace the valve. i fixed mine replacing this.
Capture.JPG

BUT SINCE YOU JUST DID A MOTOR SWAP..

there are two vacuum lines running from the transducer to the egr valve, and one line running from the transducer to somewhere else. you might investigate those vacuum lines, and make sure the electrical connector is seated properly. the transducer is kinda wedged up under the intake by the firewall.
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Old 01 May 2018, 06:34 pm
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Location: Thousand Oaks, CA
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Default Re: 0401 code

P0401 - EGR System Fault

Possible Causes:
EGR valve control circuit open, grounded or shorted to power
EGR exhaust transfer tubes blocked in the exhaust manifold
EGR solenoid EGR valve is damaged or has failed
PCM has failed

I would suggest checking to see if the transfer tubes are clogged up.
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