From Ross-Tech Wiki

Jump to: navigation, search


16556/P0172 - System Too Rich, Bank 1

Possible Symptoms

  • Irregular behavior

Possible Causes

  • Fuel system
  • Excessive fuel pressure
  • Leaking or contaminated fuel injectors
  • Leaking fuel pressure regulator
  • Low fuel pressure or running out of fuel
  • Vapor recovery system
  • Air leaks after the MAF
  • Vacuum leaks
  • Improper seated engine oil dipstick
  • Stuck EGR valve
  • Oil overfill
  • Cam timing
  • Cylinder compression
  • Exhaust leaks before or near HO2Ss.

Special Notes

Fuel Trim Info

Unless otherwise noted, all content on this site is Copyright © 2000-2010 by Ross-Tech LLC. All rights reserved.
"VCDS" is a Registered Trademark of Ross-Tech, LLC.
Ross-Tech is not affiliated with the Volkswagen Group in any way.