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Ecm Code

3K views 6 replies 5 participants last post by  Brandenton 
#1 ·
Last night my Service Engine Soon light came on in my 05 Titan SE KK and today I ran the ECM Diagnostics and came up with a ECM Code of 0456. I can't find anywere what this code means. Any help from you guys would be great.
 
#2 ·
I didn't see 456, but here is 455
P0455 Evaporative Emission Control System Leak Detected (gross leak)

could be as simple as gas cap not on correctly?
 
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