Why does ECM reset, reprogramming and update?
Although all the hardware problems are fixed, the internal software-driven parameters cannot be changed. For example, ECM reset does not clear the historical faults records. So, these parameters are needed to be cleared, and the reprogramming maybe means that it clears every parameters in ECM.
What does ECM set p0101 and p2119 by?
It turned on P0101 and P2119. After replacing an air filter and cleaning MAF and throttle body, it seemed that everything is fine. However, in the next day, ECM set P0101 again. I replaced MAF filter and PCV valve, but it could not solve my problem. So, I have taken some experiments for 1 week, in order to confirm what the conditions set P0101 by.
Why does the ECM not turn on the cel?
If the ECU sets CEL based on only hardware-driven data, the ECM should not turn on the CEL. However, it still turns on the CEL. It means that ECU software sets the P0101 DTC by refering hardware-driven data as well as some software-driven parameters that do not go back to the normal condition.
What does reprogramming on ECM mean for Nissan?
1) If Nissan found the bug in their ECM software, the reprogramming means the update of new ECM software. Some articles that were posted earlier than 2013 mentioned that the ECM reprogramming is needed to fix the P0101 problem.
Why do I need to Reset my ECM?
If your check engine light comes on then chances are there may be an internal electrical issue within your vehicle that must be addressed. Before replacing any parts you want to reset your ECM to ensure that part replacements are absolutely necessary. There are a few ways to reset your Engine control modules.
How do you change the ECM on a car?
Plug in the electrical wires to the ECM. The wiring harness will lock in once it is pushed in far enough. Connect the battery cables to the battery. Tighten the cables with a socket wrench. Start the vehicle and allow it to idle for five minutes. If there are still conflicting codes, the “Check Engine” light will come on.
How to reset the engine control module ( ECU )?
The 2 most common ways to reset your car computer is by either unplugging the battery or by resetting the fuse related to the engine control module Will disconnecting battery reset ECU? Disconnect the battery and Switch the ignition key to the on position for about 15 minutes should reset the ECU
Do you need to reprogram a 2015 ECM?
According to the TSB, even 2015 model is needed to be reprogramming. It does not make sense. So, I think that the reprogramming is not the update of new ECM software that fixes the bug. The reprogramming may simply reinstall the same ECU software.