2014 Chevrolet Spark engine problems

“Vehicle went into “limp mode” while merging onto a busy road, nearly causing a collision with both oncoming traffic and other vehicles attempting to merge onto the road. The vehicle was towed to a mechanic. The mechanic diagnosed the following: “Checked system codes. Found P0324 knock sensor module performance code. Found the attached TSB by GM. Believed to be the issue: engine has piston slap and would need rebuilt or replaced per TSB. Also discovered severe oil leak in front of engine.” Mechanic noted that the brakes were stuck as well. Engine scheduled to be replaced. Mileage: 72,503.”

“The vehicle experiences intermittent loss of power and unstable acceleration while driving at normal speeds (approximately 45–55 mph). The vehicle will surge, hesitate, and fail to maintain consistent speed, creating an unsafe condition in traffic. While driving, the vehicle does not consistently respond to throttle input and may unexpectedly lose acceleration. This creates a risk of being rear-ended or being unable to safely merge into traffic. The condition occurs during normal driving and has progressively worsened over time. Diagnostic testing indicates transmission-related faults involving pressure control and internal speed monitoring. This issue affects the safe operation of the vehicle and appears consistent with known transmission problems reported for this vehicle model. Supporting documentation has been provided, including manufacturer service program records indicating this vehicle was previously subject to a known transmission-related defect condition.”

“The GM bulletin N19227110 indicates that they are aware of over 10% of Chevrolet Spark models from the years 2014-2015 experiencing transmission problems. Although this bulletin expired last year, it is important to note that they do not provide coverage for vehicles purchased used with fewer than 120,000 miles. This situation poses a significant danger, as the transmission may potentially be contaminated with dirt and debris, leading to unexpected jerking or complete failure, and in some cases, vehicles have caught fire. Furthermore, unless the vehicle is taken to a GM service center, the issue may remain undetected. According to my research, this problem is similar to the one that Nissan faced with their CVT transmissions, which were subject to a recall for the same reason.”

“When taking off, sometimes the vehicle does not want to excellerate. It seems like the transmission is slipping or not switching gears-it makes a loud clicking gear sound. The vehicle also revs up really loud. It also sometimes feels like the vehicle sulks back when lifting your foot off the gas peddle when accelerating, more than it should. These mishaps make it nearly impossible to excellerate and is dangerous when excellerating onto the highway.”

“The gas guage meter failed to work and didn't show where the gas was and so this is dangerous because if you are driving and you were on the freeway and the car stopped because of gas, this could cause an accident and you could be hurt or killed. This part should be a recall on the car because I never should had to fix this for the lifetime of the car at all or at least after 100,000 miles, which it only had 39,000 and I had to end up paying for the ECM and having to reprogram it, which cost me over $1,000, which being disabled, I had to borrow money from a friend to do this. I paid $220 to have the Chevy Dealer tell me that was the problem and have paperwork to prove this. There was also an engine light that came, when this happened.”

“Si my cars been having issues for about a couple of weeks now with speed and it’s been driving rough, it hadn’t given me any check engine lights so I went to a mechanic he changed the throttle body thinking that was the issue however the issue persisted and even got worse. I’ve noticed it doesn’t seem to go into gear when I’m driving then when it finally does it looses power, it’s also really high on the rpm’s and when it’s in park it’ll seem like it wants to turn off.”