Chrysler 300 Problems

Check Engine Light Due to Carbon Buildup on Valves on Chrysler 300

Problem Description and Possible Solution

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.

(53 people reported this problem)

Chrysler 300 Vehicles With This Problem

RepairPal Verified
Average mileage: 95,602 (29,000–200,000)
Engines affected: 2.7L V6, 3.5L V6, 5.7L V8 HEMI, V8
5 model years affected: 2005, 2006, 2007, 2008, more2011
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Viewing 1-15 of 15 comments
Hi i'm having the same issue with my 2006 chrysler 300 3.5L, I've had it into the shop 4 times due to check engine light on and when i come to stop or get off a exit on the highway it will just die on me. then it starts up again, the last time in came on it was flashing and took it to the dealer they pulled the code which is p0300 which is a multiple misfire however they cant figure out which one is misfiring, they've reset the computer and flashed it due to the TSB on this vehicle and they have cleaned the fuel injectors and i'm still having the same issue. the dealer has had the vehicle for 1.5 weeks and still cant get the problem to duplicate. i'm confused... any advice for me as to whats going on what would cause this, please help me....
Hi i have a 2007 chrysler 300 and my car starts to shake and the check engine light turs on
The car shuts down when I slow down to under 30 mph. No engine light comes on.This has happened 4 times in the last 5 months. Been in the shop and no-one can figure out why. Any suggestions?
My check engine light comes on and I really think it is because of this symptoms of the Carbon build-up on the valaves. I have not fixed the problem yet.
Same problem over and over till the dealer used an old chemical that they say they are no longer suppose to use. Also started using better gas Sunoco 91. been OK so far
same exact issues, shakes,stalls, car shuts down,...yep like everyone else talks about. & Off course right after its paid off :(
Check engine light on and while driving all ligts on the dash come on .I had the knock sensor and EGR valve replaced but the problem is still there and the dealers cannot detect the cause.
Gas light and engine light comes. I could be driving and the gas hand drops down to empty.
Check engine light came on during a 1400 mile road trip. Code says EGR valve. Haven't repaired it yet. I have noticed some hesitation and light bucking at very low speeds. Gas mileage also has been effected. Started using Shell 93 octane and I see a big difference. Light still on though. Will replace EGR this week. Hope that's the real reason for the light being on. Otherwise the car runs perfect. Now at 93000 miles.