‘2014, I’m surprised it’s still on the road.’
A common error code on a Chevrolet Cruze can point to several different mechanical problems under the hood.
The official TikTok account for Redding, California, auto repair shop Quality Auto Repair (@qualityautorepairredding) posted a video discussing the code P0171, or lean code.
In the clip, which has garnered over 2,150 views, a mechanic at the shop explains what might be causing the error code in a Chevy Cruze he’s working on at the moment.
“We got a ‘14 Cruze. It has lean codes,” he begins. “See a lot of these.”
The mechanic points to the intake manifold and explains that inside it is a small orange rubber PCV diaphragm that can wear out over time and cause vacuum leaks and lean conditions like P0171. That’s not the case with the vehicle he’s working on, though. “This one’s good,” he says.
He then points to another common reason the error code shows up. “Also super common to see valve covers,” he says. “We got a new valve cover coming for it.”
The P0171 code on a Chevrolet Cruze means the engine is running “too lean,” which means there is either too much air or not enough fuel in the air-fuel mixture, CarBuzz explains.
Other than the two common causes the mechanic revealed in the video, CarBuzz says things like worn spark plugs, a faulty oxygen sensor, or a defective mass air flow sensor can also trigger the same code on a Chevy Cruze.
The site reports that the most common symptoms of a lean condition for Chevrolet Cruze owners are a poor engine idle, engine stalling, delayed throttle response, and more.
Fixing a P0171 lean code on a Chevrolet Cruze usually starts with diagnosing the cause. According to GM’s technicians, CarBuzz reports, it’s a good idea to begin by checking for an improperly seated oil fill cap or dipstick tube.
Technicians also often inspect vacuum hoses, intake components, and the Positive Crankcase Ventilation (PCV) system for cracks or leaks that allow air into the engine.
Because there’s a wide array of issues that can trigger a P0171 code, repair guides generally recommend doing a full diagnostic inspection before replacing any parts.
Commenters shared an overall dissatisfaction with the model.
“Absolute JUNK engines, literally has to be one of the worst GM has ever designed,” one commenter wrote.
“Don’t see a lot of Chevy Cruz on the road around here already, they all broke down,” another noted.
A third commenter shared another common cause for the error code.
“Another big one is the turbo bypass valve,” they wrote. “The diaphragm splits or gets brittle. Gives an intermittent lean code. Just done one. GM part is very expensive. Go performance part instead for less.”
Motor1 has reached out to Chevrolet via email and Quality Auto Repair via contact form for comment. We will update this story if either party responds.
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