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Robert R
Robert R, ASE Certified Master
Category: Dodge
Satisfied Customers: 4518
Experience:  Dodge Master Certified, Dodge Sprinter Certified
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006 Dodge Magnum R/T 5.7l stalls at idle (intermittent) PCM

Customer Question

006 Dodge Magnum R/T 5.7l stalls at idle (intermittent) PCM (reprogrammed per recall spec), TCM, Crank Position Sensor and Idle Control Module have all been replace by Dodge Dealer. Still happening...
JA: Is the check engine light on? Does the car stall at idle or when driving?
Customer: If problem persists them CEL will come on.... Sorry PCM = ECM. consistent codes are engine code PO700 - trans. fault and trans. code UO100 - loss of comm. with ECM. Other, random codes pop up such as P2638 - torque management feedback signal performance, B2100 - ignition run/start circuit fault, P12172 - high airflow/vac. leak detected, C121C - torque request signal denied, etc. etc. Only most of these codes only set once and new, different ones replace them
JA: What year is your Magnum?
Customer: 2006
JA: Are you fixing your Magnum yourself? What have you tried so far?
Customer: No... dealer (Sahara Dodge in Las Vegas, NV) has replaced PCM, TCM, and Crank Position Sensor. Also cleaned all connectors and this last time the codes were U0100 and U0101
JA: Anything else you want the mechanic to know before I connect you?
Customer: This is an intermittent problem and has become very frustrating
Submitted: 1 year ago.
Category: Dodge
Expert:  Robert R replied 1 year ago.

Hello, welcome and thanks for asking your question. My name is*****'m a Certified Auto Technician with 29+ years experience. I will do my best to assist you. please keep in mind that I may need to ask questions of you before I can answer. When you reply please feel free to add as much detailed information as possible pertaining to your concern.

How many miles on your Magnum?

Has the Spark Plugs been replaced? If so were these factory or aftermarket plugs?

Customer: replied 1 year ago.
Mileage is 90,248
Not sure on the replacement of the plugs but they are factory and not aftermarket.
Also I use Chevron Premium Unleaded fuel, the fuel injectors were recently cleaned manually and I have ran 2 bottles of Checron Injector Cleaner through the system. One in each of the last two fill ups.
Expert:  Robert R replied 1 year ago.

A 06 Magnum 5.7 with 90,000 miles should have had the spark plugs replaced 3 times by now. These are NOT platinum plugs and should be replaced every 30,000 miles.

I also found a Star Case related to this concern which has you replacing all spark plugs and if the problem persists replace one coil and swap it around until you find a faulty coil...

See the following document for additional info

--->> Click Here to view <<---

Keep me posted and let me know if you have any additional questions...

Thank you,


Customer: replied 1 year ago.
Wouldn't a faulty Coil Pack show up during diagnostic testing at the dealership? And/Or give an associated Fault Code?