Signs & Symptoms of a Failing ECU/ECM! (Engine Control Unit or Engine Control Module)

In today’s video, Zach dives into the heart of your vehicle's electronic brain - the ECM/ECU/PCM/DME - to shed light on its critical role, common symptoms of failure, underlying causes, and effective fixes. Whether you're a seasoned mechanic or a curious car owner, this video will hopefully equip you with the knowledge needed to diagnose and address ECM-related issues, ensuring optimal engine performance and reliability. Commonly referred to as the ECU, or Engine Control Unit, it also goes by many other terms and acronyms: ECM (Engine Control Module), DME (Digital Motor Electronics), or PCM (Powertrain Control Module).
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00:13 - What Does ECU Stand For?
01:19 - What Does a Vehicle’s ECU or ECM Do?
02:38 - Signs & Symptoms of an Engine’s ECU or ECM
05:18 - How to Diagnose a Faulty or Failing ECU or ECM

[@zanzimez]

For some reason the check engine light does not come on at all on my car, I have a ‘77 porsche 924 and it does not come on despite my car misfiring constantly. Cant even accelerate/ step on the gas without it misfiring and the car wants to cut off and is sputtering. Any ideas on what it could be?

[@d7895482]

My car engine runs just fine but in the last few years when I’ve gone out to start up it like misfires and the engine light is flashing becomes undrivable. I go inside wait 10 minutes and start it up and it runs just fine. It’s done like three or four times in the last few years.

[@8020Media]

D - Sorry to hear this.. Are you getting any engine codes?

[@ericjimenez6886]

I recently messed up my truck (2003 Silverado 1500) I connected my light bars positive wire to get power and connected it to my f/pmp relay and while I was doing it my truck shut off and ever since no crank , no start then I moved around the fuses and it starts but the dash doesn’t work and it says low power , when I go to turn off the truck it doesn’t turn off the engine keeps running for a minute then turns off . Any suggestions?

[@8020Media]

E - Are you getting any engine codes?

[@sierraproduction6581]

I believe my ecu/ecm is failing on my 18’ camaro throwing all those codes and giving a list of faulty sensors. Is it better to replace ecu first rather than going down the list and fixing all the list of codes? Ive replaced a couple of the codes like spark plugs, 2 ignition coils, and has fixed the misfires. now giving oil pressure fault sensor. And still idling rough

[@8020Media]

S - If it was up to us, we would change sensors first as they tend to be cheaper. Keep us updated.

[@Halal_Nasheed1]

My car drives amazing and everything but has a rough idle evap codes and stalls, and when the car is warm I have a no crank and I gotta wait almost a hour to be able to turn ir back on but I can’t figure out why I would love your and and I can get into detail if I get a comment back plz

[@8020Media]

Have you addressed the EVAP codes? I just did a video recently on P0449 issues on GM vehicles. It can certainly cause some of these issues depending on how gunked or clogged up the EVAP system is so I would recommend addressing that first.

[@Halal_Nasheed1]

@@8020Media it’s a 2012 Hyundai genesis 3.8 would it go the same for Japanese cars