Close
Car Questions
RepairPal is your advocate for car care advice and guidance

I have 4 coders po354 po355 po356 po357 it say primary/ secondary circuit

(2003 Mercury Grand Marquis)
in Walnut, MS on May 05, 2013
what could becauing it and what is the primary and the secondary circuit i put new plugs and coils in it still not wolking on cyc d. e. f. and h
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I have an 2008 Grand Marqui LS 4.6L flex fuel vehicle Engine code P0128 was diagnosed. I am trying to find a clear ...
There's a red wire gray with red line has me stuck don't know what connects to gray black two whites
Didn't find what you were looking for?