Code 0401 - Help Needed

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09-13-05 | 08:01 AM

#16

metalface

Driver School Candidate

Joined: Sep 2005

Posts: 25

Likes: 0

From: vt

Here is the section from my 1997 ES300 repair manual on diagnostics for P0401 "EGR Flow Insufficient".

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DI-71-80.pdf (102.5 KB, 1972 views)

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09-14-05 | 11:03 AM

#17

khhoang

Driver

Joined: Nov 2004

Posts: 145

Likes: 0

From: Alabama

i had the P0401 code last year and my mechanic changed the EGR gas temp sensor to solve my cel problem. the sensor is pretty pricey about $180 for a 95ES but definitely a DIY.

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12-21-05 | 08:40 PM

#18

chuckb

Lexus Fanatic

Joined: Aug 2004

Posts: 6,947

Likes: 4

From: Florida

Quote:

Originally Posted by 2K95es300

After replacing one of my front O2 sensors (next to the firewall) a week ago, I had my computer reset. Not long afterwards the "Check Engine" light came back on. I just had Auto Zone check the computer and it came up with the P0401 code, which they say is an EGR flow problem.

Anyone have suggestions on where I go from here?

this is so wierd--------that's EXACTLY what just happened to my 95 ES300! I got the p1035 cel for rear 02 sensor. fixed it. EXACTLY a week later, cell on again. this time 0401 EGR.

?????????????????

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