garcia26233 Posted December 29, 2009 Share Posted December 29, 2009 Just got my first truck and need some help. I got a 1-1 code and don't know what it means, also I don't know if it's related to that but the EMI light comes on for a second when rpm goes right over 14, I noticed it does it on 8th and last 10th gear. Truck is a 99 CH with a E7. Any help would be great. Quote Link to comment https://www.bigmacktrucks.com/topic/11987-help-on-emi-light/ Share on other sites More sharing options...
Underdog Posted December 29, 2009 Share Posted December 29, 2009 Just got my first truck and need some help. I got a 1-1 code and don't know what it means, also I don't know if it's related to that but the EMI light comes on for a second when rpm goes right over 14, I noticed it does it on 8th and last 10th gear. Truck is a 99 CH with a E7. Any help would be great.On my E-TECH engine a 1-1 code indicates a voltage issue with the oil pressure sensor. Oil pressure is probably OK, just an electrical fault with the wiring or sensor. Quote Link to comment https://www.bigmacktrucks.com/topic/11987-help-on-emi-light/#findComment-46061 Share on other sites More sharing options...
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