GM 1.5 Turbo Engine Problems: Common Issues, Symptoms & Fixes

GM 1.5 Turbo engine, the Chevy’s remarkable piece of engineering that delivers an exhilarating driving experience, better fuel economy, and torque, is not perfect after all. This small, thrilling powerhouse can turn your Chevy rides into road beasts without compromising fuel economy, torque, or overall vehicle performance. Yet, it has its pitfalls, just like every other engine out there.

If you want to get a new ride with the 1.5 turbo engine, read these GM 1.5 turbo engine problems to know if it is a good fit for you. You’ll learn about the GM 1.5 turbo engine review, its history, vehicles that use it, and specifications.

GM 1.5 turbo engine explained.

The 1.5 GM turbo engine is a 1.5-liter inline-four-cylinder engine with four valves per cylinder — two intake and two exhaust. This overhead camshaft design ensures precise fuel injection and optimal airflow, delivering impressive horsepower and torque.

With its compact size and lightweight construction, it is a good fit for a range of engines, from agile crossovers to sporty sedans.

That’s not all. The 1.5 turbo engine features an advanced turbocharger engineered with precision — helping it to harness the energy in the exhaust gas. Invariably delivering relentless power output.

The engine is an inline-four — meaning it has four cylinders arranged in a straight line. It is also a transverse engine — it sits sideways in the engine bay.

The intake manifold is constructed with composite materials, and the engine block and cylinder head are cast aluminum. Inside the engine block lies a stunning steel crankshaft, connected to powered, forged metal connecting rods. The camshafts in the cylinder are constructed from steel.

The 1.5 turbo inline-four engine comes in three versions, each with a unique code name — LFV, LYX, and LSD. The LFV 1.5 turbo engine debuted in the 2015-2016 timeframe. The LYX first appeared in 2018 in the GMC Terrain and the Chevy Equinox. The LSD debuted as the base engine in a 2018 GMC Terrain and a 2023 Chevy Equinox.

The LFV version makes 163 horsepower and 184 pound-feet of torque, while the LYX produces up to 170 horsepower and 203 pound-feet of torque. The LSD produces 175 horsepower and 203 pound-feet of torque. Chevy, however, did not consider the LSD a new engine from the LYX. The only difference between them is a few tweaks made to enhance combustion and reduce emissions. 

GM 1.5 turbo engine specs

What vehicles use GM 1.5 turbo engine 

Before discussing GM 1.5 engine problems, let’s see the vehicles that feature these engines so you and I can be on the same page about the vehicles that have these issues.

LFV GM 1.5 turbo engine

LYX GM 1.5 turbo engine

LSD GM 1.5 turbo engine

Common problems of the GM 1.5 turbo engine

Every engine has its strengths and weaknesses. Hence, the 2016 GM 1.5 turbo engine problems and other problems associated with later models do not make it a bad engine. Instead, they are the issues that happen more often than others.

The most common problems with GM 1.5 turbo engines are turbocharger failure in cold weather, frequent check engine light illumination, cracked or melted pistons, and numerous sensor failures.

Let’s have a closer look at these 2018 GM 1.5 turbo engine problems for a better understanding. These problems are also common with other years’ versions.

Turbocharger failure

Turbocharger failure is one of the most common engine problems in all GM 1.5-liter engine versions. Several Chevrolet owners with 1.5 GM engines have reported that their turbochargers malfunction in cold weather. According to the owners, the solution to this problem is to park your car in a warm garage — preventing the engine from getting too cold.

This problem can prevent your car from starting in cold temperatures. And even if you start the engine, the vehicle may enter limp mode and struggle to move.

Numerous sensors failing

Most GM 1.5-liter turbo engine owners report frequent oil pressure sensor failures. Oil pressure is essential in determining the flow of oil in the engine, which affects the engine’s cooling and lubrication. The oil pressure sensors in 1.5 GM turbo engines fail to maintain stable oil pressure when they fail.

Few others who have covered 100k miles have also complained of failures in other car sensors. Luckily, car sensors are inexpensive —you can get them without breaking the bank.

Frequent illumination of the check engine light

While the illumination of the check engine light is panic-inducing, it can be triggered by a minor issue. The check engine light usually appears on the dashboard whenever the car computer detects any issue — telling you to diagnose and fix it before it escalates.

However, it seems like the check engine warning light appears more often on cars equipped with the 1.5 turbo engine, even when there’s no problem. Many owners noticed the CEL appearing frequently with no other signs of an underlying problem. When diagnosed with a scan tool, no error codes appear — which confirms that the check engine warning light can appear even when there are no issues.

Regardless of why the CEL appears, it is a serious issue. Because if you ignore the warning light, you won’t know when the onboard computer detects a serious issue that needs urgent attention.

Cracked or melted pistons and terrible blow-by

Another problem with the 1.5 turbo engine is that it runs too hot due to inadequate cooling. In some cases, this can cause pistons to crack or melt. Let’s be clear here. This is not a common issue and doesn’t happen often. But when compared to other engines, melted or cracked pistons are a common issue in 1.5 GM turbo engines, especially after a severe engine overheat.

Over time, this problem can cause shuddering, rough idling, and terrible engine blow-by. Some mechanics have speculated that the cause is poor mapping with the ECM or air-fuel flow. This can cause the engine to run lean. The turbocharger in the engine exacerbates the issue as it tries to provide the engine with extra power.

Frequently Asked Questions — FAQs

How many miles will the Chevy 1.5 turbo last?

The engine problems listed in this article do not mean the engine will not stand the test of time. The Chevy 1.5 turbo is a strong engine that can last up to 200,000 miles with proper maintenance. However, if you do not follow the maintenance schedule recommended by the car manufacturer, the engine may fail much earlier.

Who makes the Chevy 1.5 turbo engine?

The powerhouse Chevy 1.5 is a 1.5-liter inline-four gasoline engine manufactured by General Motors. The engine is designed for use in compact cars such as the 2018 Buick Regal, 2018 Chevrolet Malibu, 2018 Chevrolet Equinox, etc.

Is a 1.5 L 4-cylinder a good engine?

The 1.5-liter inline-four cylinder is known for its great combination of power and fuel efficiency. This is because the engine features a single-stage, single-scroll turbocharger that keeps the engine at optimum temperature during peak performance. The turbo gives the engine an added boost while reducing the risk of overheating to a minimum.

How much horsepower does a GM 1.5 Turbo engine have?

The GM 1.5-liter turbo engine LYX version debuted with 170 horsepower and 203 pound-feet of torque. The engineers made a few tweaks to the combustion and emissions systems and released the LSD version with a whopping 175 horsepower, while torque remained at 203 pound-feet.

Final Words

Let’s face it: while you have seen GM 1.5 turbo engine problems and customer complaints, it is a reliable engine with a great combination of power and fuel economy. There’s no engine on earth without one or two problems. All engines have their glory and pitfalls. And those pitfalls do not make them bad engines.

While these problems are common with GM 1.5 turbo engines, that does not mean they happen to all of them. It only means that the chances of experiencing them are fairly high.