Understanding Powertrain Control Modules

Known by many acronyms, vehicle computers use input from multiple sensors to make decisions about how to keep the vehicle running correctly throughout a wide range of conditions and then send their own signals to various actuators, modules and solenoids.
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[@jess8257]

When this goes out do that mean the cr going bad ?

[@darkracer1252]

this pcm is what detects a battery voltage fault when i park for a long time with my radio on and gives me a check engine light. that stays on for 2 drives. (if i take another drive the next day. and nothing happens, it goes away.. if i don't take another drive untill 2 weeks later it waited for that second drive. and then goes away after that drive.)

[@carlorocky]

One day after using a portable air compressor that plugs into my cigarette lighter, the AC compressor clutch will not engage. The entire system was replaced last year and has sufficient charge. Also, the clutch will engage when jumped out and blow cold air but will not work when I turn it on in the car. I think I might have fried the PCM. Any thoughts about this? Thank you

[@dianacordero7895]

I have 2010 Camaro ss 6.2l with a po340 code ,I put camshalf sensor with new harness and the code still dear. any suggestion

[@briandickinson1885]

How do I get the powertrains of the dash signal

[@barneygordon2585]

what is code reader says PCM not equipped?

[@ctgosey69]

Thxs!

[@Towerdawgg1979]

Will a pmc make my car not wanna shift?

[@bobbyz23]

Yes it controls the TCM transmission control module

[@Towerdawgg1979]

@@bobbyz23 thanks

[@Towerdawgg1979]

@bobbyz23 it's not wanting to shift after about 10 15 mins of driving and a mechanic had the car for months and finally said it was the pmc and he couldn't program it to the car that a Mazda dealer would have to do it because of the pats system

[@bobbyz23]

@@Towerdawgg1979 Correct the Maxda dealer will have to program it.

[@Towerdawgg1979]

@@bobbyz23 10-4 I appreciate the help

[@user-bf9wz7ei6r]

Tgi side by the hotel