Interesting you said RPM fluctuations at idle. My fluctuations happen while accelerating with a "warm" engine. Once I'm up to speed all is well. (No, its not the transmission.) No RPM fluctuations during first drive of the day. Have you heard of this? I'm at my wits end.
What’s the vehicle? Sounds like throttle position sensor or throttle body getting stuck from carbon buildup. If you’re lucky just clean it, the sensor isn’t hard either.
hello i have a 2012 chevy malibu it will shut down without any warning at any speed will not start back unless you remove the battery cable and leave it off for a minute or so any help would be greatly appreciated
Hello! The issue with your 2012 Chevy Malibu shutting down unexpectedly and requiring a battery reset to restart sounds quite concerning. Here are some possible causes and steps you can take to troubleshoot and potentially resolve the problem: Electrical System Issues: This behavior might indicate a problem with the vehicle's electrical system. A poor connection or faulty battery terminal could cause intermittent power issues. Check the battery terminals for corrosion or looseness, and ensure the battery itself is in good condition. Ignition System: Problems in the ignition system, such as a failing ignition switch or issues with the ignition relay, can cause sudden shutdowns. These components might need testing or replacement. Engine Control Unit (ECU) Reset: The fact that removing the battery cable temporarily fixes the issue suggests that the ECU may be experiencing faults or errors that are cleared with a reset. This could be due to a software glitch or faulty ECU hardware. Let me know if you found the issue
I have a 2012 Malibu and tonight I was on the highway and the rpm’s flew up to 7 and then completely died and had to get a tow, It’s been shutting down random and crank but no start but tonight it completely died
@@natej9851I’d be suspicious of crank or camshaft position sensor throwing the engine into limp mode. Odds are low it actually revved itself that high, probably just thought it did from bad input.
I have a 2013 Ram 1500 hemi. Im thinking i have a bad PCM. Constant dinging, check engine light random low voltage at times, and now every once in a while it wont run above 1500 or so rpms, and it takes minutes to get up to speed. Flashes bad abs, traction control, trailer brake system and check shifter. The other day my whole instrument panel went out, including the entertainment center, when it came back up it said "no bus". All that said, is there tests to run on the PCM to make sure its bad? Ive checked all grounds, and connections, and battery voltage and all seem ok.
@@anthonybonilla8902 after 2 months on the struggle bus with this truck, I finally gave in and took it to a shop. They found I had an exposed bit of wire under the TIPM in the one of the harness pigtails. Been 3 weeks now, no dings or lights.
Hi there, Yes, a bad PCM (Powertrain Control Module) can affect the throttle body. The PCM controls the throttle body's operations in modern vehicles with electronic throttle control, so any malfunction in the PCM can lead to issues with throttle response and engine performance.
Hey man so look i have a 2010 chevy malibu im having issues with my coolant temperature sensor at first i replace it my self and it worked but only last me like 2 days i decided to take it to a shop they look at it and they say it was a wiring issue so they replaced the wires and it works car was starting and ac was working then 3 days later the temperature gauge stop working and it was difficult to start so i took it back to the shop they replaced the thermostat and then the car started working ac was good etc now yesterday in the morning i was driving and again the temperature gauge dropped and the ac stop working so what could it be man? I replaced the sensor the thermostat the wires what could be causing this 😢😢😢 help me out man
Hi. The recurring issue with the coolant temperature sensor, despite replacing the sensor, wiring, and thermostat, suggests there might be a problem with the PCM (Powertrain Control Module) or an intermittent short circuit in the wiring harness. A faulty PCM can cause erratic readings and improper operation of the temperature gauge and AC. An intermittent short circuit can also cause similar symptoms. At this point, it's best to have a professional mechanic perform a thorough diagnostic of the vehicle's electrical system, including the PCM, to identify and resolve the root cause of the problem.
Yes, a faulty Engine Control Module (ECM) can affect the Anti-lock Braking System (ABS). The ECM's role in processing data and communicating with the ABS control module means that communication errors or incorrect data processing due to ECM issues can hinder ABS operation. Additionally, ECM problems can trigger unrelated fault codes, affect electrical power distribution, and compromise integrated safety systems, including the ABS. Diagnosing such problems accurately is crucial, as ECM-related symptoms can resemble other issues. A qualified mechanic may need to reprogram or replace the ECM to resolve these issues and ensure proper ABS function.
Is it possible that the ECU can cause an engine knocking just during warm up.
Yes or no ?
Interesting you said RPM fluctuations at idle. My fluctuations happen while accelerating with a "warm" engine. Once I'm up to speed all is well. (No, its not the transmission.) No RPM fluctuations during first drive of the day. Have you heard of this? I'm at my wits end.
What’s the vehicle? Sounds like throttle position sensor or throttle body getting stuck from carbon buildup. If you’re lucky just clean it, the sensor isn’t hard either.
@@OCtheG already cleaned, no difference. Oh well, it was totalled a few weeks ago. Sigh. Not a problem now.
My ecu overheating. What could be problem?
hello i have a 2012 chevy malibu it will shut down without any warning at any speed will not start back unless you remove the battery cable and leave it off for a minute or so any help would be greatly appreciated
Hello! The issue with your 2012 Chevy Malibu shutting down unexpectedly and requiring a battery reset to restart sounds quite concerning. Here are some possible causes and steps you can take to troubleshoot and potentially resolve the problem:
Electrical System Issues: This behavior might indicate a problem with the vehicle's electrical system. A poor connection or faulty battery terminal could cause intermittent power issues. Check the battery terminals for corrosion or looseness, and ensure the battery itself is in good condition.
Ignition System: Problems in the ignition system, such as a failing ignition switch or issues with the ignition relay, can cause sudden shutdowns. These components might need testing or replacement.
Engine Control Unit (ECU) Reset: The fact that removing the battery cable temporarily fixes the issue suggests that the ECU may be experiencing faults or errors that are cleared with a reset. This could be due to a software glitch or faulty ECU hardware.
Let me know if you found the issue
I have a 2012 Malibu and tonight I was on the highway and the rpm’s flew up to 7 and then completely died and had to get a tow, It’s been shutting down random and crank but no start but tonight it completely died
@@natej9851I’d be suspicious of crank or camshaft position sensor throwing the engine into limp mode. Odds are low it actually revved itself that high, probably just thought it did from bad input.
I have a 2013 Ram 1500 hemi. Im thinking i have a bad PCM. Constant dinging, check engine light random low voltage at times, and now every once in a while it wont run above 1500 or so rpms, and it takes minutes to get up to speed. Flashes bad abs, traction control, trailer brake system and check shifter. The other day my whole instrument panel went out, including the entertainment center, when it came back up it said "no bus".
All that said, is there tests to run on the PCM to make sure its bad? Ive checked all grounds, and connections, and battery voltage and all seem ok.
Canbus connections Under seats it’s a clip
@@anthonybonilla8902 after 2 months on the struggle bus with this truck, I finally gave in and took it to a shop. They found I had an exposed bit of wire under the TIPM in the one of the harness pigtails. Been 3 weeks now, no dings or lights.
i have a 2005 pontiac grand prix gxp and i just order a new ECM. Will i have to get my car retuned ?
Hi, Can you please clarify a bit so I can give an informed answer
Can a bad pcm affect the throttle body?
Hi there, Yes, a bad PCM (Powertrain Control Module) can affect the throttle body. The PCM controls the throttle body's operations in modern vehicles with electronic throttle control, so any malfunction in the PCM can lead to issues with throttle response and engine performance.
I have a 2002 Monte Carlo. I'm pretty sure that its the ECM. But where is it located?
Air filter box maybe
Thank you!!
Hey man so look i have a 2010 chevy malibu im having issues with my coolant temperature sensor at first i replace it my self and it worked but only last me like 2 days i decided to take it to a shop they look at it and they say it was a wiring issue so they replaced the wires and it works car was starting and ac was working then 3 days later the temperature gauge stop working and it was difficult to start so i took it back to the shop they replaced the thermostat and then the car started working ac was good etc now yesterday in the morning i was driving and again the temperature gauge dropped and the ac stop working so what could it be man? I replaced the sensor the thermostat the wires what could be causing this 😢😢😢 help me out man
Hi. The recurring issue with the coolant temperature sensor, despite replacing the sensor, wiring, and thermostat, suggests there might be a problem with the PCM (Powertrain Control Module) or an intermittent short circuit in the wiring harness. A faulty PCM can cause erratic readings and improper operation of the temperature gauge and AC. An intermittent short circuit can also cause similar symptoms. At this point, it's best to have a professional mechanic perform a thorough diagnostic of the vehicle's electrical system, including the PCM, to identify and resolve the root cause of the problem.
Can it affect the ABS?
Yes, a faulty Engine Control Module (ECM) can affect the Anti-lock Braking System (ABS). The ECM's role in processing data and communicating with the ABS control module means that communication errors or incorrect data processing due to ECM issues can hinder ABS operation. Additionally, ECM problems can trigger unrelated fault codes, affect electrical power distribution, and compromise integrated safety systems, including the ABS. Diagnosing such problems accurately is crucial, as ECM-related symptoms can resemble other issues. A qualified mechanic may need to reprogram or replace the ECM to resolve these issues and ensure proper ABS function.