Misfire and/or Check Engine Light Due To Failed Ignition Coil on Cadillac DeVille

An ignition coil may fail causing one of the cylinders to misfire. Each of the two banks of cylinders has its own coil assembly. If one ignition coil fails the coil assembly for the corresponding cylinder bank must be replaced.

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Average mileage: 121,769 (8,000–204,442)
7 model years affected: 1997, 2000, 2001, 2002, more2003, 2004, 2005
46 people reported this problem
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problem details
2000 Cadillac DeVille 170,000 mi,
misfiring, poor acceleration, runs terrible! Changed coil pack, spark plugs, fixed & replaced o2 sensors and 2nd & 3rd cylinders...still no go!!! Trying fuel pump...not getting any codes!
2002 Cadillac DeVille 106,000 mi,
'Service engine soon' light is on. It states that 'Cylinder 8 misfire' is the problem. I'm hoping it's something simple like a failed ignition coil on that cylinder or a spark plug...
2001 Cadillac DeVille 145,000 mi,
Engine shaking occured during normal driving. Check engine light blinking constantly while driving.Replaced both ignition coils corrected the problem. Very costly.
when i go to give it some gas car starts shaking like, it doesnt stall, it feels like a misfire but not sure.
engine at different times starts to misfire runs roughand some time dies. poor accelerationi have replaced the o2senor on front and back exhaust manifolds and also the mass air flow sensor to no improvments.
replaced front three times with aftermarket. recommend against aftermarket their not reliable. Replaced the rear bank and now getting a misfire code on #7
2002 Cadillac DeVille 116,000 mi,
had this problem replaced coils and everything was fixed coils are very expensive the labor doesn't cost much the part itself was close to $350 total job cost was $800. recommend replacing spark plug with this coil job
2003 Cadillac DeVille 118,000 mi,
Dead miss confirmed by OBD II on no 6 cyl. Replaced coil pac.
2000 Cadillac DeVille 97,153 mi,
service engine soon light flashing had it checked said it was #4 cylinder misfire
2001 Cadillac DeVille 130,110 mi,
Front coil pack self destructed at about 126000 miles followed by the rear coil pack at 130000. These Caddys are built like an old AMF Harley...if you like it you will constantly be sinking money into it and working on it every couple of weeks. Typical American car that lasts about 100000 miles (for $50,000) and goes to hell. On another note my Mitsubishi just turned 300000 without ever having an issue and cost 1/3 of my gas guzzling American crap box. Being close to 50YO I have had lot of cars and the Japanese have completely kicked our asses. We have produced nothing but garbage since the 70's. Unless you got tons of spare cash, another car, and lots of patience I would avoid Cadillac and get yourself a Jap car that will last over 200000+ miles.
2003 Cadillac DeVille 87,000 mi,
car runs ruogh check engin light on says misfirer on number three cylinder.also has crankshaft senser bad.
2002 Cadillac DeVille 146,000 mi,
car shakes and runs rough due to coil packs needing to be replaced.
2002 Cadillac DeVille 111,000 mi,
replaced both coils
2004 Cadillac DeVille 150,000 mi,
Misfire on cylinder 5
2005 Cadillac DeVille 128,000 mi,
Is not fixed yet
replaced front module. now i am told the rear needs to be replaced also
2004 Cadillac DeVille 86,000 mi,
Missfire on cylinder 8. Car shaking on idle and shut off on low speed or under trafic light. Scanning toll show Crank position sensor B need to be replace. Swaped ignition coil 6 and 8, now is missfire on cyl 6, Went to autozone and replace front bank, $170 and problem is gonne, i hope this post will help someone.
Changed my spark plugs and I noticed that the middle spring on my coil was burnt the little plastic piece was melted to the spring I'm no mechanic but I'm guessing that the coil pack is bad and that's why my car is misfiring
2004 Cadillac DeVille 69,000 mi,
Not fixed yet! Quoted $800
2002 Cadillac DeVille 150,000 mi,
sputtering, check engine light blinking on and off, Belle Tire states misfiring of cylinders one and two. $800