I had a temporary check engine light for icp pressure code 1211 i believe. I checked it today with a scan tool and had a passenger watch. it stayed about 2500 on setting 3 (matts tunning). is this normal or low. on heavy tow it will hit about 3300. Is my hpop going or is it a bad sensor...... Truck is stock except tuning and gauges. 2001 cc