Has anyone with the 6.7 been having the problem I am with the malfunction light coming on all the time? Just had the recall done with the o2 sensor and thought that may have done it but its back on again. This is 13 times since July? Back to the shop again.

 

I've hadmy truck since June and had two CELs. One got me a new turbo, the other was a loose fuel cap.

I think after 13 tripsfor service, I'd have a little heart to heart discussion with someone in management at the dealership. That is a significant investment of your time and probably actionable under the lemon laws. Start by talking nicely (but firmly) with the management, pointing out how much time you've spent at the dealership seeking warranty repair and thatyou continue to have issues. Collect and organize all your repair records and keep track of every visit and conversation you have (including names and dates). Carefully read the lemon law literature that came with your vehicle and understand how it applies in your state.

Hopefully you'll get it fixed, but you should be prepared for the alternative. Good luck.

 

Back from dealer. Code 2000 this time.Code cleared. Awaiting engineers explanation of code and remedy. Sure wish I got the 5.9.

 

P2000-NOX ADSORBER EFFICIENCY BELOW THRESHOLD - BANK 1
Theory of Operation
The engine aftertreatment system monitors the O2 content in the diesel engine exhaust. The ECM monitors the exhaust gases for oxygen content and varies the rich/lean fuel mixture of the intake air fuel mixture to adjust system. This diagnostic measures the Oxygen storage capability of the NOx Adsorber Catalyst. The ECM will set the fault if it detects that the Nox Adsorber performance is lower than expected. The ECM will illuminate the MIL lamp immediately when the diagnostic runs and fails. The ECM will turn off the MIL lamp diagnostic runs and passes in four consecutive drive cycles





Possible Causes

EXHAUST, EGR OR INTAKE LEAKS

DEGRADED OR POISONED NAC

USE OF HIGH SULFUR FUEL

TAMPERING OR REMOVAL OF THE NAC

O2 SENSOR FAILED IN-RANGE

MASS AIR FLOW SENSOR

Hope this sheds some light on the subject.......

 

Wow thanks for the info. My service guys here are trying hard to help me out but Im beginning to wonder if the experience is just not there. I just am getting tired of returning this truck evertime this light comes on.

 

Well trained diesel techs are few and far between.