Car Problem Reports

Chrysler Pacifica Check Engine Light Due to Carbon Buildup on Valves

Chrysler Pacifica Problem
19 Reports
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Model Years Affected: 2004, 2005, 2006

Engines Affected: 3.5L V6, 3.8L V6

Average Mileage: 122,407 mi (60,000 mi - 178,000 mi)


Carbon buildup on the valves may illuminate the Check Engine Light, indicating "Multiple Cylinder Misfires." The combustion chamber must be cleaned of carbon. There are updated valve spring retainers that will help prevent a recurrence.

  •  Rookie

    my check engine light is on as well whn they get buildup like that would it cause my car to back fire and hard to start,put in a new fuel pump worked for 2 days and it stopped agian.or what would make my fuel pump burn out so quick

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  • Visitor, , 3.5L V6, 155,427 mi

    Engine light comes on and just got a tune up and oil change.

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  • Visitor, , 3.5L V6

    misfire codes come up change all the coils and still get misfire and engine light blinking

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  • Visitor, , 3.5L V6, 65,000 mi

    Engine Misfire, cylinder replacements, timing belt and water pump. $3900/ Called Chrysler they said not under warranty and cannot help with resolution.

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  • GOLDENGODDESS, , 3.5L V6, 154,456 mi


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  • Visitor, , 3.5L V6, 60,000 mi

    If I try to maintain a steady speed of between 35 and 45, the car just "stutters". Higher speeds and lower speeds seem ok. My mechanic has cleaned all the cylinders because of the "cylinder misfire" code. He puts some stuff in to clean valves and it's ok for a while then starts again.

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  • Visitor, , 3.5L V6, 79,900 mi

    My motor light on

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  • tonygday, , 3.5L V6, 157,000 mi

    Engine light comes on and usually stays on. the Last car I brought with this same problem, I wasn't able to Pass the emissions Test.

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