SOURCE: 2004 1500 Dodge Ram Check engine light on
U0155 definition is lost communication with the ipc control mod , (instrument panel cluster) , reasons include faulty IPC , loose / bad connections at IPC , i read some forums and and some found connection issues at fuse box , when the problem exists you could try wiggling wires at behind fuse box or the back of the IPC try to locate source if indeed it is a connection issue .
good luck.
SOURCE: Check engine light
RE: Check Engine Light
The check engine light may come on for several reasons
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It is not necessary to worry as it may be as simple as putting the gas cap on without fully clicking it shut!. If this is the case it will go away by itself in about a week at most!
You can take your car to an auto parts store to have them run a diagnostic (Some will do this for free).
If your car is running fine, re-tighten the gas cap, give it a week or have it diagnosed if you still feel uncomfortable with it.
jackiaria
SOURCE: check engine light on code
This trouble code is Evap Purge System Performance fault. 1) Check for a loose or missing fuel cap. 2) Check for a damaged or missing fuel cap seal. Recheck for other trouble codes. This fault wont cause the stumblering problem. It turns on the MIL lamp to say there leak in the EVAP system.
SOURCE: 2005 dodge Ram 1500 truck 5.7 Hemi check engine lights comes on
Two things you want to know about the check engine light on any vehicle. One is it's an emission warning. The most common cause is a loose gas cap, make sure it clicks when you gas up. Second, is that being an emissions light, is that it'll require some test equipment to find the problem if you checked the gas cap and it's tight. You will want to do that at your friendly Dodge dealer. Why? They'll not only know what it is, it might be fixed free in the emissions warranty which has some parts that are covered longer than the vehicle's regular warranty. The shop on the corner doesn't do warranty work and they're not going to tell you if it might be covered.
SOURCE: Check engine light
A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.
The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner.
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