Q: Are the powertrain control modules in a 2004 Dodge Ram and 2008 Dodge Ram the same?

asked by on

We are trying to figure out the trucks problem. I got a p0601 code as well as ignition coil codes and evap system codes. We bought a truck from a dealer and the engine went out within a week, they replaced the engine with an 04, they disabled our check engine light in the process and i doubt they changed out the pcm to match the current engine that was put in. Would a pcm for a 2008 cause a 2004 engine to have ignition coil codes, and evap system codes. Im trying to figure out if I just need to get the right pcm or is this worse than im thinking?

My car has 174000 miles.
My car has an automatic transmission.

The powertrain control module (PCM) part numbers for the 2004 and 2008 model year trucks are different. So, it’s possible that the PCM could be the problem. However, there are countless things that could have gone wrong with an engine swap like this. Just one wire being left disconnected could cause all kinds of problems, including those you describe. I recommend taking the vehicle back to the shop that did the repairs to demand they make things right. If that doesn’t work, the team at YourMechanic would be happy to diagnose and repair your Dodge.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Are the powertrain control modules in a 2004 Dodge Ram and 2008 Dodge Ram the same?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking


It sounds like the voltage regulator may be overcharging causing it to essentially electrocute the PCM. As you may know, the voltage regulator regulates the voltage in the system by not allowing the alternator to over charge the battery. As...

Q: Engine light came on , was hesitant when i pulled off , sometimes cut off when at stop lights

Hi and thanks for your question. Sounds like there could be a fuel or spark issue with your engine. First you would need to scan the computer for what the engine light code has stored to have a starting place...

Q: I would like to know which engines are interchangeable in my 2003 Dodge Ram 1500

Hi there. You can use any engine from 2003-2008 Dodge that was equipped with the same engine. In 2006 they used two different 5.7 engines so it would be important to check the engine code to make sure that it...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...