Auto Parts and Repairs
Dodge Ram
Mazda Protege
Ford Ranger XLT

Why does the engine light keep coming on indicating code PO402 excessive EGR flow detected in a 2000 Mazda protege after the egr valve and EGR booster sensor were replaced?

Top Answer
User Avatar
Wiki User
2007-12-24 04:55:26
2007-12-24 04:55:26

The answer posted previously seems to be taken verbatim from this site, and probably copyrighted there:

Mazda EGR Flow: Low or Excessive?

and if that doesn't work, there are additional tips here:

P0402 EGR code Help - Automotive Message Forums

Related Questions

User Avatar

The power brake booster of a vehicle is replaced by removing the fluid reservoir, unbolting the booster from the firewall, and disconnecting it from the brake pedal. A new booster can then be connected and bolted into place.

User Avatar

The power brake booster on a 95 Chevy Blazer is replaced by draining and removing the master cylinder, unbolting the booster, and removing it from the vehicle. A new cylinder is then put in its place and bolted on.

User Avatar

Sounds like it could be a problem with the vacuum booster or vacuum supply to the booster Check for a vacuum leak Make sure the check valve on the booster is working Check the vacuum canister

Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.