Q: Does my ECM / PCM have to be reprogram after replacing with new one?

asked by on

On dashboard Hot Oil flashing comes on only when driving thru traffic jams and lots of red lights usually after driving over an hour then I don't see the Hot Oil sign till I turn engine off and back on again right after check engine light appears so I don't drive anywhere for like over an hour An half then the hot oil words go off as well as the check engine light I took it n to a transmission service and they replace the ecm /PCM and my car is still doing the sane thing, the mechanic told me the PCM for my car didn't need to b program at all , but I'm thinking it did cause a day after being service my car is doing the exact same thing and codes are reading ecm/ PCM so please help me out , whatever is going on the hot oil pops up.first then the engine after and once it cools they both disappear , so I was wondering if my ecm/PCM for my car has to b reprogram r this one comes program already?

My car has 1600000 miles.
My car has an automatic transmission.

Hi there. If you were to get an ECM (engine control module) from the dealership, the dealership will flash (program) the ECM to the VIN number to your vehicle and all of the specs. However, if you were to purchase an aftermarket ECM, you also will need to have it flashed to match your VIN number to your vehicle and all of the specs. If you need further assistance with replacing the ECM, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
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. Does my ECM / PCM have to be reprogram after replacing with new one?

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

Q: in my car where and how can i locate the ECM

First, why do you want to replace the PCM and/or BCM? It's very rare that a module goes bad. The problem is usually something else. I recommend having a professional, such as one from YourMechanic, diagnose and repair your vehicle;...

Q: How much to replace the two rear suspension coils?

Billing question was sent to CS for the cost of repairing / replacing the rear suspension coils on a 2006 Mercedes-Benz E350.

Q: car won't start after timing chain replaced

This would depend on the value of the vehicle and how much money you have into it all together. Oftentimes if the vehicle's value is lower than the amount of money that you have into it it is often better...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...