LMM: Check Engine Light

ikeG

Oughta Know Better
Apr 19, 2011
2,484
154
63
Western PA
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Can't seem to keep the CEL out on an LMM. Using the EFI scantool the 3 codes are:
B2978(Left front/driver or generic) door ajar circuit low
P2455 particulate matter trap diff press sensor circuit high Pending
P0546 exhaust gas temp sensor circuit high bank 1 sensor 1 pending

the b2978 code is red and says current
My questions are, which one is setting the CEL?
Would these pending DPF codes come up pending no matter what?
I have them set to not report. :confused:
 

chevyburnout1

Fixing it till it breaks
Aug 25, 2008
2,368
1
38
Berthoud, CO
Only the 'P' codes will set the check engine light. Just off the top of my head but did you turn the code to not report, AND set the same code to 'NO SES'? I've only delt with tuning an LMM once so I'm not quite sure exactly if the coding system is the same as my LB7