Chevy Cruze P0171 Code: What It Is And How To Fix It

Ultimate on sale for the 2019 model 12 months, the Chevrolet Cruze scored over 1.8 million product sales throughout the USA sooner than the popularity of SUVs assured its demise. These sedans have been equipped with a variety of powertrains, along with a 1.4-liter four-cylinder turbocharged mill and a 1.8-liter four-cylinder naturally aspirated engine. It’s these two engines which were inclined to triggering the P0171 error code, which signifies a lean scenario on monetary establishment 1, whereby the air-to-fuel ratio accommodates each too little gasoline or an extreme quantity of oxygen. Now we have lined the P0171 error code sooner than, as a result of it applies to all autos, nevertheless this time, we’ll take a deeper dive into the specifics of this widespread fault code that plagues the Chevy sedan.

What Does The P0171 Error Code Suggest?

The P0171 error code signifies the engine is working lean. The powertrain administration module (PCM) screens the oxygen content material materials of the exhaust post-combustion. If the Heated Oxygen Sensor (HO2S) signifies elevated ranges of oxygen content material materials, the PCM makes adjustments to the injector pulse to steadiness their-fuel ratio. This adjustment occurs constantly whereas the automotive is working. The P0171 error code is about when the weighted widespread of the adjustment differs from the calibrated value. In simple phrases: the PCM models the P0171 error code when there’s an extreme quantity of oxygen content material materials or too little gasoline throughout the air-fuel ratio.

What Causes The P0171 Error Code?

The PCM can set a P0171 error code for various faults. The most common faults for the P0171 error code are:

• Worn spark plugs
• Defective engine valve cowl
• Faulty oxygen sensor
• Faulty manifold absolute pressure sensor
• Faulty gasoline injectors
• Defective mass air flow into sensor

The subsequent are all potential faults which will set off the Chevy Cruze to set the P0171 error code:

• Vacuum hoses with splits, kinks, and improper connections
• Insufficient amount of gasoline throughout the tank
• Low gasoline pressure
• Gasoline contamination
• Malfunctioning gasoline injectors
• Missing, free, or leaking exhaust parts from the HO2S forward
• Vacuum leaks on the consumption manifold, the throttle physique, the brake booster hose, and the injector O-rings
• Leaking air induction system or air consumption ducts
• Missing air filter ingredient
• Cracked Evaporative Emission Administration (EVAP) system canister
• Evaporative pipes obstructed or leaking
• Leaking crankcase air move system
• Improperly put in HO2S
• HO2S electrical wires or connectors that can have contacted the exhaust system
• The B52A Heated Oxygen Sensor 1 sensor 1 signal circuit open, shorted to flooring or shorted to the low reference circuit
• The B52A Heated Oxygen Sensor 1 sensor 1 low signal circuit for an open circuit or extreme resistance
• Malfunctioning engine parts

Indicators Of The P0171 Error Code

The most common symptom reported by Chevy Cruze owners is the Service Engine Shortly (SES) mild, which could be illuminated. Totally different doable indicators Cruze drivers might experience are:

• Poor engine idle
• Engine stalling
• Lack of engine vitality
• Delayed throttle response
• Lowered gasoline financial system

Can I Drive My Chevy Cruze With This Drawback?

The P0171 error code won’t stop your Cruze from taking place the road. Nonetheless, there are a selection of points to note. In case your Cruze is setting the P0171 error code, it will not transfer emissions inspections, it’s possible you’ll experience lowered gasoline financial system, and your engine can endure a shortage of effectivity, a doubtlessly dangerous symptom. We advocate you restore the P0171 error code as shortly as it’s possible you’ll and forestall long-term continued operation.

How To Restore A P0171 Error Code On Your Chevy Cruze

Based mostly on GM’s Technical Service Bulletin (TSB), an improperly seated oil fill cap or dipstick tube will be the set off. We advocate checking this main, significantly in case your Cruze had newest repairs carried out. In case your engine oil cap and dipstick tube are appropriately seated, we advocate you give consideration to the Optimistic Crankcase Air move (PCV) system first.

The PCV valve hoses can break and crack, inflicting unmetered air to be drawn into them. You should rigorously study the PCV hoses connecting the engine valve cowl to the consumption.

AllData’s Uncover-A-Restore experiences one of many essential widespread repairs as an engine valve cowl. Because of the Cruze integrates the PCV valve into the valve cowl, it would not present a replaceable PCV valve requiring valve cowl substitute.

In our fundamental piece on the P0171 error code, we moreover lined how one can set up a lean engine in further ingredient.

How Lots Does It Worth To Restore?

Because of frequency of the P0171 error code for Cruze owners, repairing the fault mustn’t take an extreme quantity of diagnostic time or labor.

There’s on a regular basis the possibility that your automotive wouldn’t endure from the on a regular basis faults. Repairs corresponding to consumption gaskets and worn gasoline pumps can add as a lot as a costly restore bill. A gasoline pump substitute in your Cruze can run as a lot as $750. Consumption gaskets normally should not as pricey with substitute coming in between $200 and $400.

With practically all of repairs being spark plugs or valve cowl replacements, fixing the P0171 error code in your Chevy Cruze shouldn’t injury too badly. Using the commonest repairs, it’s possible you’ll anticipate the related payment to be anyplace from $25 to $200, consistent with RepairPal.

*Bear in mind: GM has updated the half amount for the valve cowl thrice. Make certain you order the latest mannequin.

Half Worth Estimates