Trouble code

Reply Subscribe

Thread Tools

Search this Thread

Mar 16, 2009 | 10:52 AM

chubbyboy88

Thread Starter

Senior Member

Posts like a Supercharger

Joined: Jan 2009

Posts: 198

Likes: 0

From: West Philly

Trouble code

I got the service engine code 0402 after I put in a new mass airflow sensor an reset it. I drove it today for a half an hour and the service engine light poped back on I pulled out my scanner and got that code.What does that code usually mean?

Mar 16, 2009 | 11:08 AM

Purplehazeir

Senior Member

True Car Nut

Joined: Sep 2008

Posts: 7,979

Likes: 2

From: Arlington, WA

See if this thread doesn't help you https://www.gmforum.com/t279443/

Mar 16, 2009 | 11:09 AM

tlsheff

Okie Hokie

Posts like a Camaro

Joined: Dec 2008

Posts: 1,107

Likes: 1

From: Durant, Ok 74701

DTC P0402 Exhaust Gas Recirculation Flow Excessive Detected

Mar 16, 2009 | 01:54 PM

BillBoost37

DINOSAURUS BOOSTUS

Expert Gearhead

Joined: Mar 2005

Posts: 41,391

Likes: 30

From: Enfield, CT

BillBoost37 is a glorious beacon of light

EGR flow is detected by the MAP sensor. However if it'* stuck open ...which it should also complain about that.

Excessive flow might be a vacuum leak as well.