Hi,
OMG! They want to replace the engine? That doesn't even make sense at this point. Do me a favor, I need you to have the can-bus system scanned for diagnostic trouble codes. CAN stands for controller area network. Basically, all the modules and computers are tied together. By scanning it this way, it will indicate codes that can be related to any of the modules on the vehicle.
Here is a video showing how this is done:
https://youtu.be/InIlnsjOVFA
If the engine runs normally when the light goes off, it is likely a sensor or electrical problem and not the engine.
Let me know if you can have that done. If so, let me know the codes that are found. Also, if you have other questions, let me know.
Joe
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Thursday, December 17th, 2020 AT 9:08 PM