99 TOD trooper, rear wheels blinking, CHECK lite
 

1999 trooper 3.5L engine with torque on demand. runs smooth but the rear wheels on the torque-on-demand panel blink and so does the red "CHECK" light. while the RPMs are normal-y-ish, i'm actually getting about 5-6 miles per gallon of gas. no spit. 5 mpg. plugs are good and platinum, but have a white ash on the prong side of the sparkplugs. thanks in advance -jack

poor economy.
 

More details! Do you know if it is locked in four wheel? Also does it start easy? Maybe economy is poor from one problem and the TOD flashes are a different concern.