william Posted June 27, 2019 Share Posted June 27, 2019 this is a national guard vehicle. it does idle a lot. I have been fighting this for about 3 years now. about every 6 months it will set this code and tech line has been no help. I have replaced eot and ect sensors overlayed eot sensor wiring replaced pcm. flushed coolant last time hot line said to check valley in upper oil pan for plug disloged internally. I did not see an issue but replaced it and the oil cooler. 2 months later it came back and hotline again suggested an overlay. I can never duplicate the issue sets overnight and the sensors read the same and when I drive it they both increase and stay with in 4 degrees of each other. does anyone have a suggestion on what I can do to resolve this? thanks for any help. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted June 27, 2019 Share Posted June 27, 2019 What are the conditions when the code sets in freeze frame data? Quote Link to comment Share on other sites More sharing options...
william Posted June 27, 2019 Author Share Posted June 27, 2019 73st light.pdf Quote Link to comment Share on other sites More sharing options...
8WA Sman Posted June 28, 2019 Share Posted June 28, 2019 MAF_A 928 g/s at idle? Issue with the signal return RE405, sensor or PCM needs a new calculator Run time is :02...This thing sure does warm up fast according to ECT & EGRT, is the block heater plugged in? Quote Link to comment Share on other sites More sharing options...
mchan68 Posted June 28, 2019 Share Posted June 28, 2019 ECT2 at 140F and EOT at 82.4F? Quote Link to comment Share on other sites More sharing options...
william Posted June 28, 2019 Author Share Posted June 28, 2019 I do not know if block heater is being used. according to the obd theory is should detect if block heater is being used. the run time is what I can not figure out. if I drive the vehicle a let it sit for a couple of hours I can not get this spread in temp difference. it does have a new pcm in it. Quote Link to comment Share on other sites More sharing options...
8WA Sman Posted June 28, 2019 Share Posted June 28, 2019 Entry conditions should be 8 hrs. soak, I can't remember if there is a key off timer pid. Just thinking out loud...maybe BCM or something is not waking up the PCM until the vehicle has been running for a while???? Quote Link to comment Share on other sites More sharing options...
forddieseldoctor Posted June 29, 2019 Share Posted June 29, 2019 Egt’s are within 10 degrees of aat, which would indicate that the runtime would be accurate. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted July 18, 2019 Share Posted July 18, 2019 By the freeze frame it Sure seems like the block heater is plugged in or it has an espar / webasto heater running. Soak time would be handy to know here. There was a reflash years back to prevent a cel and P012f when block heater was used overnight. Quote Link to comment Share on other sites More sharing options...
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