Crankcase (pcv) problems of the 2017 Chevrolet Malibu

While driving at highway speeds, my vehicle suddenly experienced a loss of engine power and reduced acceleration. The traction control light and engine light illuminated, and a “reduced engine power” message appeared. The vehicle would not respond to the accelerator, creating a serious safety hazard. This occurred shortly after authorized dealer service involving the pcv system and related components. The vehicle did not have this issue prior to dealer service. I returned the vehicle to the dealer, and they stated they could not replicate the issue. The sudden loss of power could have resulted in a serious accident. I believe this may be related to improper dealer service, disturbed electrical connectors, or throttle body/engine management components. I am reporting this as a safety concern. I also would like to mention this safety issue has occurred now multiple times with my car on multiple separate occasions with the last prior occurrence being 12/20/2025.

The contact owns a 2017 Chevrolet Malibu. The contact stated that while driving approximately 20 mph, the vehicle stalled. The contact stated that the message to depress the brake pedal and shift to park(p) was displayed. The vehicle was restarted but stalled again. The contact had the vehicle towed to an independent mechanic who diagnosed the vehicle and determined that the oxygen sensor needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The contact stated that the failure only occurred while driving at speeds below 40 mph. The vehicle was returned to the same mechanic, and it was determined that the oxygen sensor needed to be replaced. The contact stated that the pcv valve and the valve cover were replaced; however, the failure reoccurred. The contact had taken the vehicle to a local dealer who diagnosed the vehicle and advised that the oxygen sensor was not oem and replaced the oxygen sensor with an oem part. The vehicle was repaired, but the failure reoccurred. The contact returned the vehicle to the dealer who diagnosed the vehicle and reprogramed the hybrid engine control module. The vehicle was repaired but the failure reoccurred. The contact had not taken the vehicle back to the dealer or to an independent mechanic. The vehicle was not repaired. The contact informed the manufacturer of the failure. The failure mileage was approximately 75,000.