# EGR 402 Excessive Flow **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [February 17, 2009, 5:16pm UTC](https://community.cartalk.com/t/egr-402-excessive-flow/26589 "2009-02-17T17:16:07Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Bob\_La\_Londe](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bob_la_londe/32/1170_2.png) [@Bob\_La\_Londe](https://community.cartalk.com/u/Bob_La_Londe)\ **Post date:** [February 17, 2009, 5:16pm UTC](https://community.cartalk.com/t/egr-402-excessive-flow/26589/1 "2009-02-17T17:16:07Z")
07 6.6L Turbo diesel keeps popping EGR 402 codes. GM cleaning procedure done ($90). EGR Valve replaced (free). No codes for a couple weeks then bam… three times in the last week. Reset with code reader each time to see if it was a stray code or a real problem. So what to do next? The dealership should be responsible at this point for tracking down the problem, but apparently they don’t know how. ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [February 17, 2009, 7:23pm UTC](https://community.cartalk.com/t/egr-402-excessive-flow/26589/2 "2009-02-17T19:23:13Z")
Is there some kind of solenoid that controls the EGR valve? That’s where I would suspect next. Could be just a flaky connector. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [February 17, 2009, 7:55pm UTC](https://community.cartalk.com/t/egr-402-excessive-flow/26589/3 "2009-02-17T19:55:05Z")
how about the flow sensor itself?