ECU problems
ECU: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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engine control module
2015 Chevrolet Malibu Engine 143915 miles
code (P0506-00) : IDLE SPEED LOW
code (P2228-00) : BAROMETRIC PRESSURE (BARO) SENSORE CIRCUIT LOW VOLTAGE
code (P2228-00) : BAROMETRIC PRESSURE (BARO) SENSORE CIRCUIT LOW VOLTAGE
1 report
Intermittent idle drop 
Solved
2009 Chevrolet Malibu 2.4 150000 miles
The car will sometimes drop the idle for a moment while driving or at idle. While driving, you can feel a noticeable change in engine speed and also see a visual drop in RPMs. Same at idle. Condition is worse when outside temp is over 80 but will do it even when cold outside.
Have replaced and plugs, wires, throttle body, MAF and and other sensors that might control idle. Have reset the ECU every time I change something, just to be sure it relearns what changed.
Has been happening for the past 2 years and it never gets worse. It also never triggers a CEL or code. Just an annoying problem th… Read complete
2 reports
Had same issue, change tcu. Drain off ecm the let idle for 15 m before driving
Best answer (according to CarDad2025)
CarDad2025 from United States a year ago
The issue turned out to be a bad fuel injector on #1. Would never throw a code but had to drive the car for a long trip and it finally threw a code and led me to the issue. New injector solved the problem.
CommentCheck engine light, 3 codes (U01BO, U0284, U1345)
2020 Chevrolet Malibu LS 1.5 turbo 86020 miles
The other day my check engine light came on. I put a code reader on it and it threw 3 codes. U01B0 (Lost communication w battery sensor), U0284 (Lost communication w active grille air shutter I motor module) and U1345(Engine Control Module LIN Bus 1.
I checked all fuses, checked for damaged wiring, nothing. So I replaced the battery monitor module. Same problem. At first, my fan would be running going from slow to fast and back again the entire time, but that has stopped. I've checked the voltage on the lin bus wire coming from the negative terminal of the battery, apparantly it should be fro… Read complete
6 reports
Still unresolved, and no comments. StartMyCar asked me to make this comment.
Were you able to resolve this? I currently have the U0284 causing my check engine to be lot up right now. Let me know and thanks!
CommentRoll over no start
2007 Chevrolet Malibu 167853 miles
A friend was helping me try and get my tail lights to work he started doing things under the hood pulling fuses tightening the ECU and now my car won't start
2 reports
No crank no start
2008 Chevrolet Malibu Malibu 100000 miles
No crank no start loss comuinicatuon witg ecm/pcm
1 report
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